Heliamphora minor

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Heliamphora minor
Heliminor.JPG

Heliamphora minor

Systematics
Nuclear eudicotyledons
Asterids
Order : Heather-like (Ericales)
Family : Pitcher family (Sarraceniaceae)
Genre : Swamp Jugs ( Heliamphora )
Type : Heliamphora minor
Scientific name
Heliamphora minor
Gleason
The high plateau of the Auyan-Tepui

Heliamphora minor is a carnivorous plant and the smallest species from the genus of the marsh jugs ( Heliamphora ). The plant is only known from a table mountain in Venezuela.

features

With tubes 10 to 15 centimeters long and 3 to 5 centimeters wide at the opening, Heliamphora minor appears rather stocky. The lower part of the hose is slightly bulbous, the upper part cylindrical to slightly funnel-shaped. The constriction between the two parts is usually not very pronounced.

The inside of the plant is densely covered with fine hairs, which are 0.1 to 0.5 millimeters long. These fine hairs are barely visible to the naked eye or are completely absent and the inside of the tubes appears mostly smooth. This characteristic can be used to distinguish it from Heliamphora pulchella, which is also small but has significantly longer hairs . At the edge of the opening there is a hem of 1 to 3 millimeter long hairs that point inwards and prevent an insect from crawling out of the trap. Another ring made of 4 to 5 millimeter long hairs is located on the inside in the middle part of the trap.

There is an incision 5 to 15 millimeters long on the front of the leaf, which serves as an overflow for the rainwater. The helmet-shaped lid sits on a small handle, it measures 0.5 to 1 centimeter in diameter. If there is enough light, the tubes turn red.

Occurrence

Heliamphora minor is endemic to the Auyan tepuis in the Canaima National Park in southern Venezuela .

Research history

Heliamphora minor was first discovered by George Henry Hamilton Tate in 1937 . The first description goes back to the work of Henry Allan Gleason , who described the flora of the Auyan-Tepui in 1939. In 1984 Julian Alfred Steyermark described a form of Heliamphora minor f. laevis .

Occurrences on the Chimantá massif and the surrounding tepuis such as the Aprada and Akopan tepui , which were previously attributed to Heliamphora minor , were separated as a separate species in 2005 under the name Heliamphora pulchella .

literature

  • Henry A. Gleason, Ellsworth P. Killip: The Flora of Mount Auyan-Tepui, Venezuela. In: Brittonia. Vol. 3, No. 2, 1939, ISSN  0007-196X , pp. 141-204, ( JSTOR 2804811 ; first description).
  • Stewart McPherson: Pitcher Plants of the Americas. The McDonald & Woodward Publishing Company, Blacksburg VA 2007, ISBN 0-939923-74-2 , pp. 146-149.

Individual evidence

  1. ↑ Stewart McPherson: Pitcher Plants of the Americas. The McDonald & Woodward Publishing Company, Blacksburg VA 2007, pp. 146-149.
  2. ^ Andreas Wistuba , Thomas Carow, Peter Harbarth, Joachim Nerz: Heliamphora pulchella, a new species related to Heliamphora minor from the Chimanta region, Venezuela. In: The Taublatt. Issue 53, 2005, ISSN  0942-959X , pp. 42-50 , here p. 42, (first description of Heliamphora pulchella , German translation).
  3. ^ Adrian Slack: Carnivorous Plants. 3rd imprint. MIT Press, Cambridge MA 2000, ISBN 0-262-69089-6 , p. 24.
  4. ^ Henry A. Gleason, Ellsworth P. Killip: The Flora of Mount Auyan-Tepui, Venezuela. In: Brittonia. Vol. 3, No. 2, 1939, pp. 141-204.
  5. ^ Andreas Wistuba, Thomas Carow, Peter Harbarth, Joachim Nerz: Heliamphora pulchella, a new species related to Heliamphora minor from the Chimanta region, Venezuela. In: The Taublatt. Issue 53, 2005, pp. 42-50 .

Web links

Commons : Heliamphora minor  - collection of images, videos and audio files