Irmgard und Siggi in Bonn Irmgard & Siggi HARTMEYER introduce Carnivorous Plants (CP)  Information, photos and movies on a fascinating hobby.
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Last update 2020 January 8th
Siggi & Mantis religiosa
Copyright ©2020 Irmgard & Siegfried R. H. Hartmeyer

CPN 48/4 2019
Photos above: Siggi with Mantis religiosaCPN Cover 12/2019

Our movies are non-profit productions to promote the knowledge on CP in an entertaining and science-based fashion. All photos/videos are protected by copyright. 
Recommended resolution 1920 x 1024 pixel (HD).
Welcome Trailer
Welcome Trailer on YouTube
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Our CP-collection
(listing with photos)

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Articles and reports on carnivorous plants
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Plant and seed offers
Available movies on
DVD & Blu-ray
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Springschwanz in Drosera callistos

NEW Button animiertHD ZeichenLast upload: 2019 December 26:

Tsunami 2004 Sri Lanka - Thumb

On 2019-12-26, exactly 15 years passed by; therefore,
Irmgard and I
decided to show our private shots also publicly..

Private DVDs on world wide carnivorous plants available on request.
Hunting Veggies Logo 2012
DVDs & Blu-rays on carnivorous plants.
© Irmgard & Siegfried R. H. Hartmeyer
Cover Karnivorentour Stew McPh GB
German and English language
Sarracenia - Endangered Gems/Gefährdete JuwelenDas Katapult der DivaCover Fleischfresser auf dem Blocksberg

Planet Wissen:
Pflanzen wie wir.

Neue Sicht auf unsere grünen Mitgeschöpfe
with technology writer Volker Arzt.

On air via the TV-stations SWRARD-alphaWDR, 1-plus, HR, RBB >view online<
Expert consultant is the famous technology writer Volker Arzt, who talks about the making of his documentary and book "Kluge Pflanzen" (Clever Plants). It was a pleasure to provide some film fooltage  for "Planet Wissen" (English: planet knowledge).
The worldwide first broadcast of a catapult-flypaper trap on TV.
Volker Arzt mailed us: "The editorial staff "caught fire" after looking at your clips on the internet ...".
The warmy recommended book by Volker Arzt: For everybody who is looking for more information on the defensive strategies and the sensoric performance of plants. It provides a plain, thrilling and entertaining insight into modern plant research. Enclosed is a DVD with two film documentaries!
Kluge Pflanzen. C. Bertelsmann, 2009 - ISBN: 978-3570010266
Planet Wissen 14.08.2015 58:32 Min.Available until 14.08.2020 SWR

Pflanzen können viel mehr, als die meisten Menschen denken. Pflanzen locken und lügen, sie warnen und wehren sich und sie wissen sich zu orientieren. Mit jeder neuen Untersuchung entdecken Botaniker weitere faszinierende Fähigkeiten. So sind Pflanzen in der Lage, Farben und Gerüche zu unterscheiden. Sie kommunizieren untereinander und mit Tieren. Sie erkennen, wer an ihnen frisst und reagieren mit passgenauen Abwehrstrategien. Gast bei Planet Wissen ist der Naturfilmer und Journalist Volker Arzt, dem mit "Kluge Pflanzen" ein preisgekrönter Film gelang.

Foto TVtotal 2002 Pro7-TV
TV total, November 2002.
Siggi on Germany's most famous sofa with Stefan Raab.
Siggi Hartmeyer's performance at TV total.
Click on the photo to view the broadcast on
YouTube Button.

Comedy meets Carnivorous Plants. Germany's popular entertainer Stefan Raab questioned Siggi on "the personal sensitivities of carnivorous plants".

A very special lesson. Here is much room for a lot of laughter.

More informationen at our page "The Hartmeyers on TV".
Byblis&Lindernia: Motion&Enzyme Tests
Byblis bewegt sich doch ... und Lindernia?
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A highlight for CP-enthusiasts! In 2018, first videos by Dr. Gregory Allan (GB) on Facebook showed an active motion of Byblis trichomes. However, the topic literature describes the carnivorous genus as immobile. To review that behavior, we made own time lapse shots with a microscope that turned out to be surprisingly even for ourselves.

They confirm clearly that the unicellular trichome stalks show an active motion down to the leaf surface after being touched by prey. Therefore, we looked up again the work of some CP pioneers like Charles Darwin (1875) or C.A. Fenner (1904), and included their findings and assumptions on Byblis complemented with excerpts from Dr. Gregory Allan's first shots (with his kind permission). In addition, we examined the related Lindernia cleistandra (all Lamiales) that likewise occurs in tropical Australia and that is like Byblis densly covered with glandular trichomes. However, its state regarding carnivory is yet unclear. We complemented the time lapse shots with an enzyme test, which we used even in 2010 to detect digestive enzymes in Byblis filifolia. Well, just view this film and you will know more about these interesting plants.

We would like to express our thanks to Dr. Gregory Allan, Dr. Jan Schlauer as well as Holger und Anja Hennern
for their kind support during the making of this film.
Thumb GB Realm of Emergences
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The Realm of Emergences shows the history and the currently most detailed description of the spider leg sundews (section Arachnopus) by their different emergences in an entertaining fashion. With D. hartmeyerorum, Dr. Jan Schlauer split the first species from D. indica for its unique morphology in 2001. Criticized by some experts at that time, today we can say with certainty that the plants in this section can actually be distinguished by their emergences, even if their function is often not known. Only the characteristics of the emergences of D. hartmeyerorum have been unequivocally proven. They function as optical lenses, which light up bright yellow even under a red laser beam. In D. cucullata we find structures that appear like ant abdomens and when the German couple Holger & Anja Hennern discovered a sundew with ice-lolly emergences in 2008, even the experts were amazed. These and further emergences that appear even more fascinating beneath the microscope help to identify the plants that have been distinguished from D. indica so far.
This film enables you to recognize the featured plants easily.
Der Indische Sonnentau
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Untangling the Indian Sundew Muddle. Even in 1753, Linnaeus described the Indian Sundew (Drosera indica) officially. In our film, we are especially happy to show the herbal records that existed at that time with the kind permission by the Trustees of the Natural History Museum London (GBR) and the Naturalis Biodiversity Center in Leiden (NLD). Despite their different appearance, between 1753 to 2001 all spider leg sundews (Drosera section Arachnopus) occuring from Africa over Asia to Australia were identified as D. indica. Some early attempts to assign plants as separate species, such as by Planchon in 1848, failed because the distinguishing characteristics were not considered sufficient and/or reliable.

Eventually in 2017, we were able to examine also the micromorphology of the "real" D. indica and found emergences, which were obviously misinterpreted and/or ignored in the existing literature. Until today, the spider leg sundews are often confused and therefore incorrectly labeled in botanical gardens as well as private collections. With our film "Untangling the Indian Sundew Muddle" we hope to be helpful to assign D. indica correctly. We are very grateful for the kind support by taxonomy expert Dr. Jan Schlauer, for the provision of seeds from the "real" D. indica by Gideon Lim and the photos of D. barrettiorum by Holger & Anja Hennern.
The Real Plant of Prey Thumb
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Always fascinating:
The "Real Plant of Prey" in action. One minute worth the time.
HD ZeichenYouTube Button Symbiotic bugs living on carnivorous plants in tropical Australia
A condensed summary of the discovery (1995, video & printed publications) of the mutualisms of several capsid bugs (Miridae) with Byblis filifolia, Drosera aquatica, D. ordensis and D. serpens. Prior to our publications, such mutualisms were only known in Australia from the area around Perth (Francis F. Lloyd, 1942 & W. E. China, 1953) on Byblis gigantea and some Drosera.
Symbiotic bugs YouTube Thumb

Predatory mirid bugs form biological communities with different sticky carnivorous plants. Such a symbiosis with Roridula and Pameridea bugs was first described from South Africa by the German botanist Rudolf Marloth in 1902. About half a century later, Lloyd (1942) and China (1953) reported on Setocoris and Cyrtopeltis bugs living on Byblis gigantea and some Drosera near Perth (Southwest Australia). In 1995, Irmgard and I were very fortunate to film and publish four of such mutualisms for the first time on tropical Byblis and Drosera in Northern Australia. On three journeys, we spent more than six months in Australia to capture news on carnivorous plants on film and found luckily even a not described sundew. As a positive consequence, our movies and articles on the discoveries found the interest of acknowledged scientists, and led to an invitation to hold a video lecture at the National Science Museum in Tokyo, Japan. That was both, a great honor and a confirmation of the relevance of our work. This film contains excerpts from our original footage and comments; however, remastered (includes English subtitles) as a brief entertaining (HD) summary on the bug - carnivorous plant mutualisms in tropical Australia.

The first publication of the mutualisms that we discovered on our video-tour through Northern Australia took place even in 1995 in the Bulletin of the Australien Carnivorous Plant Society (ACPS). A detailed description of the phenomenon followed in 1996, including a those days painstakingly collected listing of the systematics of mirid bugs (Diciphini), which live on sticky carnivores. Once again synchronically published in the German and English language in Das Taublatt Heft 27 (jetzt als PDF) and the Bulletin der ACPS Volume 15.
HD ZeichenYouTube Button Laser fire on Drosera hartmeyerorum (Tentacles act like residual light amplifiers.)
Our experiments suggest that the yellow emergences of Drosera hartmeyerorum act like a residual light amplifier, comparable to the eyes of crocodiles or cats when illuminated with a torch at night. The film provides our experiments with different light sources like halogen and red laser. CAUTION: Laser beams are dangerous. Protect your eyes  when you conduct such tests, especially when you observe the laser through a magnifier.
ICPS World Conference Tokyo 2002
We received on YouTube, Facebook and e-mail the same question: What benefit has the plant from these emergences ? Well, the incident sunlight is white and the reflected light is (flickering due to movement in the wind) bright yellow. That is very attractive to insects, especially on a strong contrasting dark red background, which appears black to insects. Yellow flypapers are very effective and often used to trap flying pests in nurseries and on fruit trees. The dark red background appears black to insects because their visual ability is shifted to the short-waved range of the spectrum. They don't see red, but they are able to see UV patterns. Regarding these facts, the emergences, which developed from simple sticky tentacles, are perfectly designed to lure prey into the sticky plant center.

CPN Cover

Click on cover
for full text (PDF).

Technical Refereed Contribution

Several pygmy Sundew species possess catapult-flypaper traps with repetitive function, indicating a possible
evolutionary change into 
aquatic snap traps similar to Aldrovanda.

Siegfried R. H. Hartmeyer and Irmgard Hartmeyer (2015). Carnivorous Plant Newsletter Vol. 44/4:172-184.

Click on text for an abstract (DE & GB).

HD ZeichenYouTube ButtonCatapults in Pygmyland / Katapulte im Zwergenland (bilingual English & German)

Catapults in Pygmyland

Amazing results: Pygmy sundews capture minute prey like springtails with rapid catapult action. Our experiments for this film (English subtitles) show that Drosera glanduligera is not longer the only sundew with a catapult-flypaper trapping mechanism. Also the snap-tentacles of several pygmy Drosera act with the speed of a closing Venus flytrap and fling walking prey from the periphery of the plant onto its sticky leaf. Therefore they turn out to be actually comparable with the amazing Drosera glanduligera, however, their catapults are multifunctional and possess a mechanism to avoid unessential movement: Like the Venus Flytrap. Under our microscope we examined 22 Drosera and received surprising results. Furthermore we were able to film many pygmy Drosera in situ on field trips with Allen Lowrie, Greg Bourke and Kirstie Wulf (1991 & 2001), providing these shots now for the first time on YouTube.
Miscellaneous Drosera hartmeyerorum Schlauer
Tentacles act like residual light amplifiers.
ICPS World Conference Tokyo 2002

Our film Fluorescent Pitcher Plants.
Nepenthes unter UV-Licht

Click on photo to view it on YouTube

Zirkumzenitalbogen Allerheiligen in Weil am Rhein
Circumzenithal arc on All Saints' Day 2014 over Weil am Rhein. (Photo S. Hartmeyer)

The catapult-flypaper trap at the Special Exhibition Carnivorous Plants (Regio-Messe Lörrach) and on German TV:
Siggi & Irmgard
Publications and videos on the fascinating catapult-flypaper trap
Cover Blu-ray: Das Katapult der Diva HD Zeichen The Diva's Catapult
Bilingual on DVD & Blu-ray (HD)
The Diva's Catapult - YouTube
>Publication in PLOS ONE<
In September 2012 our filmlet for the PLOS ONE article
Catapulting Tentacles in a Sticky Carnivorous Plant
Video of the week by the German magazine Bild der Wissenschaft.
Blu-ray & DVD View documentary on YouTube (Playlist) Public relations by the University Freiburg International press coverage
Tentakelkopf D. glanduligera Katapult-Leimfalle Kurzfilm

Digest: The catapult-flypaper trap in action.
Prey capture clear and brief on YouTube.

D. glanduligera table
Drosera glanduligera      a) Flower     b) Plants in bloom     c) Seed (SEM)
A. konjak Amorphophallus konjak flower
grew to 1.86 m height.
Cover Auf Karnivorentour DEpub
On CP-tour with
Stewart McPherson

Stew's trips to the Tepuis of Venezuela and their fascinating fauna and flora. A collaboration with the famous author of CP-books, who kindly provided us his raw film-footage for the editing and production of this documentary. We show all species of Heliamphora (described until 2010).
DVD description   The English movie as playlist on YouTube

CP-books and more by Stewart McPherson
Schnelltentakel und LandescheinwerferDrosera: Schnelltentakel und Landescheinwerfer Our examinations on sundew tentacles from 1994 to 2010.

YouTube   Drosera glanduligera

Publication in CPN      General view with microscope pictures
Drosera hartmeyerorum Braktee
Drosera hartmeyerorum -
The sundew with light
reflecting tentacles
Byblis cf. filifolia x liniflora
The Byblis-hybrid
B. filifolia x liniflora

Publication in CPN    YouTube
Byblis Kultivar Goliath
Pulvinus and movement
in Byblis

YouTube 1     YouTube 2
Nepenthes truncata mit Maus N. truncata eats 4 mice

Publication in Das Taublatt

Rob Cantley mit Nepenthes truncata black

Visit at Borneo Exotics in Sri Lanka 2004.

DVD    YouTube

Publication in Das Taublatt
Irmgard mit T-Rex
Trevor Hannam und Siggi auf Mount Bartle Frere
Pictures from Australia 2001

Catopsis berteroniana Samenkapseln
Catopsis berteroniana
EEE Leiden
EEE 2007 in Leiden (NL)
Dionaea muscipula Aktionspotenzial Messung Award by the Robert Bosch Stiftung: Dionaea-project in Berlin

Cover Gezeitenwechsel im Hochharz

Gezeitenwechsel im
a book by Christa Hartmeyer

Zoropsis spinimana

Zoropsis spinimana: a new invasive spider
An easy to operate, weather resistant time lapse camera (Video with Nepenthes on YouTube)
Schizandra-Blues by Brian Barnes on YouTube
Foto TVtotal 2002 Pro7-TV TV broadcasts

Auf YouTube
Nepenthes mirabilis var globosa
General view photo-pages and photo-reports

Recommended Links
D. glanduligera snap-tentacle head 3D. glanduligera snap-tentacle head 4D. glanduligera snap-tentacle straight 2D. glanduligera snap-tentacle triggered 2

In 2009 we upgraded our documentary on snap-tentacles for a CP-project at the University Würzburg. This has been
uploaded to YouTube in the German language (click on pictures). This lecture is also available on DVD.
Drosera glanduligera in February 2012
Nepenthes gymnamphora
Utricularia 'Nüdlinger Flair' in February 2012
Nepenthes gymnamphora
Drosera glanduligera in March 2012
Nepenthes gymnamphora
Hunting Veggies Logo
In retrospect 2012
2012 became the "Year of the Diva". The nickname Diva was coined forDrosera glanduligera for its unique catapult-flypaper trap, as well as for its really sophisticated growing conditions.
December 2012
Drosera glanduligeraA new generation of D. glanduligera germinated end of September after only three cool nights and  constant feeding is necessary. Too high night temperatures could trigger a premature flowering. We experienced the warmest Christmas ever recorded in Southern Germany.

September 2012

Drosera glanduligera Kinematik farbigThe result of our collaboration with the Plant Biomechanics Group was published on September 26th at 10pm by PLOS ONE (USA), online and with open access, entitelt "Catapulting tentacles in a sticky carnivorous plant" ... and due to a lot of interest their server was preliminary "on its knees" in the beginning. Thus, the term catapult-flypaper-trap has been successfully and scientific seriously established and achieved a world-wide feedback in more than 100 printed and online media.

January to March 2012

Drosera glanduligera Kopf REMOn invitation by the Plant Biomechanics Group of the Botanic Garden of the Albert-Ludwigs-University Freiburg we examined together the unique trapping mechanism of D. glanduligera with scanning electron microscope, high-speed camera and cross-sections. For that purpose we cultivated about 150 plants inside our cold greenhouse. The collaboration was absolutely pleasantly and successful.
Than we had to wait for the publication ...

January 2012

Drosera glanduligera Kopf REM

On January 25th we were invited for the semester opening of the VHS 
der Älteren (VHS=adult evening school) in Weil am Rhein at the Altes Rathaus and presented our film "Sarracenia - Endangered Gems". Like always at these VHS events the audience was very enthusiastic and enjoyed the pitcher plants in Alabama and Florida together with coffee and cake.
Hunting Veggies Logo
In retrospect 2010 & 2011
Byblis cf. filifolia x liniflora
December 2011
The story of our new Byblis hybrid is published in  CPN. The German translation became released in Das Taublatt (2011/3). And even the F2-generation is growing nicely ...

Cover Sarracenia Blu-ray DiscNovember 2011 Our new film "Sarracenia - Endangered Gems" is ready edited and available in HD on Blu-ray disc and in SD on DVD. Premiere took place November 21st at the VHS in the town of Lörrach (Germany).

Drosera glanduligeraOctober 2011 18 months after harvesting our first self propagated seeds of D. glanduligera, we are very happy that they show now rich germination. Another "Season of the Diva" started.

Byblis cf. filifolia x linifloraJuly 2011 Some healthy Byblis hybrids are flowering inside our greenhouse. Result of a successful cross-pollination of B. filifolia 'Goliath' with B. liniflora 'David'. But no Byblis hybrids have been reported in the wild so far.

Carow Stand Regio Messe May 2011 Guided by Brian Barnes, we are able to film several beautiful CP-growing sites in Alabama and Florida (USA).

CPN Cover  Vol. 39/4 2010
December 2010 Our article "Snap-Tentacles And Runway Lights" is an upgrade of our years lasting examinations on Drosera tentacles, published now in Carnivorous Plant Newsletter (CPN).
YouTube Video Snap-tentacles
October 2010 Our YouTube channel exceeds 100'000 downloads.

Cover DVD Stew
September 2010 After one year of editing our new film "On CP-Tour With Stewart McPherson" is released and started with a successful premiere in Basel (Switzerland).

ChloroFilms Banner

August 2010 Our report on the annual sundews awards a 2nd prize in ChloroFilms Plant Biology Video Contest.

Carow Stand Regio Messe March 2010
From May 20 to 28 another Special Exhibition Carnivorous Plants takes place after 11 years at the Regio Messe Lörrach. Attracting about 60'000 visitors this became a very successful event.
Nepenthes gymnamphora in summer 2011
Nepenthes gymnamphora

Nepenthes attenboroughii in winter 2011/12

Nepenthes attenboroughii 2012

Nepenthes attenboroughii in spring 2011

https://www.youtube.com/watch?v=O-xZOo3TxxkNepenthes attenboroughii 2010

Nepenthes attenboroughii_Type 2

Some hints for navigation

Irmgard & Siggi (Regio-Messe Lörrach 2010)

Special Exhibition Carnivorous Plants 2010
Regio-Messe Lörrach 2010

Our "collection listing" informs about the species that we cultivate. Green colour shows that a small amount is available. Details on available plants can be found at "offers". All plants have been propagated at our greenhouse from seeds, cuttings or by division. Nothing comes from nature! Our collection - exactly spoken those species protected by CITES - are registered at the Regierungspräsidium Freiburg (responsible authorities) since 1986. On "articles and reports" you can find our publications, translations, and also some book and DVD reviews.

We provide pictures from our collection, examinations on Drosera tentacles with our USB-microscope, information on the unique trapping strategies of particular plants like the catapult-flypaper-trap of Drosera glanduligera or the light reflecting emergences of Drosera hartmeyerorum. A page with changing content informs about our topic activities and shows even more photos. Or find information on some "TV-broadcasts" in which we participated, like "Welt der Wunder" (Pro7 TV), "Treffpunkt im Grünen" (SWR TV) and even in Stefan Raab's famous "TVtotal" late-night show. 

Or enjoy pictures of the European Carnivorous Plant Exchange and Exhibition (EEE) 2007 in Leiden (NL), Dinosaurs, or information on Christa Hartmeyers' book "Gezeitenwechsel im Hochharz" (only German language). More  serious websites on CP can be found at our links page.

Meanwhile, 130 CP-videos have been uploaded to YouTube. Just select a film from our overview, and enjoy them gratis.

Logo Tinnitus LigaOne of very few serious addresses for everybody suffering "ringing ears"

Deutsche Tinnitus Liga

The website provides also information in the English language.