DROSERA DOCUMENTATION

articles and reports

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DVD reviews:

Victor Brown wrote a review on CPUK forum, Chiara di Biase wrote a review in the Italian language for the magazine of the Italian CPS (AIPC) and provided an English translation. The newspaper BADISCHE ZEITUNG wrote 2006 AUG 11 (translated):

"... a DVD on sundew herbs ... showing impressive macro- and microscope shots with 200 fold magnification."

DROSERA: SNAP-TENTACLES AND RUNWAY LIGHTS

(German edition: Drosera: Schnelltentakel und Landescheinwerfer)

Drosera glanduligera snap-shots in 0.16 seconds!! An amazing record. Enjoy our speed contest sundew versus Venus Flytrap! Rapid moving marginal tentacles without mucilage-glands appear world-wide and their distinct development during the continental shift draw serious conclusions from the evolution of the sundew family. With numerous macro-, microscope- and timelaps pictures this phenomenon becomes summarised for the first time on our DVD, in an interesting manner for laymen and experts.

Our HUNTING VEGGIES^® SPEED CONTEST between the Venus  Flytrap and the fastest sundew on earth may be called a highlight. At the moment we don't know any literature that shows mostly macro- and partly microscope pictures of 53 Droseras from all continents (absolutely, Antarctica is too cold meanwhile), sorted by their sections. Meanwhile, one year after releasing the DVD and article, more than 100 species have been examined on the phenomenon. So this documentation is unique until now and even CP-experts have been surprised. As a consequence also the sundew family has now a member which moves within the tenth part of a second. Actually, showing the runway lights (left picture) is one more highlight that we are able to add to the story of snap-tentacles.Additional we show an amazing footage that solves the mystery of the "yellow emergences" of Drosera hartmeyerorum: "... simply use a torch!"

The whole story is well edited and we even composed an own soundtrack called: Snap-Tentacles And Runway Lights. Pictures from our movie can also be found with our articles "Clandestine Diversity: The Snap-Tentacles of Genus Drosera"and "Drosera hartmeyerorum - Der Sonnentau mit Lichtreflektoren", Hartmeyer, I. & Hartmeyer, S. (2006).

€ 15,- (+ postage)

D. glanduligera

D. pulchella

D. cuneifolia

Drosera burmannii

Drosera sessilifolia

D. aliciae                       D. cistiflora

D. occidentalis                          D. montana

           D. binata Snap-Tentacles         Speed Contest

"Runway lights" of D. hartmeyerorum

The International Carnivorous Plant Society showed it at the ICPS World Conference 2006 in Frostburg (USA), and it was scheduled for the European Exchange and Exhibition 2006 in Bonn (Germany). 2007 we are invited to show it in Switzerland and January 2007 it has been presented by the Volkshochschule (VHS adult evening classes) in Weil am Rhein (Germany). A free download event on EZTV was used more than 20'000 times.

Table below: our published articles on the topic

Drosera glanduligera: Der Sonnentau mit Klapp-Tentakeln (Das Taublatt)

Verborgene Vielfalt: Die Schnelltentakel der Gattung Drosera (Das Taublatt)

La diversità nascosta: i tentacoli a scatto nel genere Drosera (AIPC Magazine)

Supplement: Meanwhile we know without any doubt that also Drosera rotundifolia develops snap-tentacles, but not all times. Therefore our statement that "... no sundew developing winter resting buds shows snap-tentacles"must be corrected for the round leaved sundew. For D. anglica, D. filiformis, D. intermedia and D. linearis our observations are right. Why we did not find the snap-tentacles at our own domestic Drosera will be for ever a miracle to us :-))))). The other results that we found with adult plants are meanwhile confirmed in many cases. Also confirmed is our expectation (mentioned in the film) that the seedlings of many more species develop snap-tentacles, but loose them when growing older. For example most seedlings of section Drosera, but also of section Lasiocephala (i.e. D. ordensis, D. petiolaris) where until now no adult species with snap-tentacles could be found. The topic remains exciting.