Nepenthes inermis

Nepenthes inermis
	Nepenthes inermis
Systematics
	Eudicotyledons
	Nuclear eudicotyledons
Order :	Clove-like (Caryophyllales)
Family :	Pitcher family (Nepenthaceae)
Genre :	Pitcher plants ( Nepenthes )
Type :	Nepenthes inermis
Scientific name
	Nepenthes inermis
	Danser

Nepenthes inermis is a carnivorous plant from the genus of pitcher plants ( Nepenthes ). It occurs exclusively in Sumatra and has only been little explored.

description

Nepenthes inermis is a perennial, evergreen , climbing plant. The stems are 3 to 5 mm thick, irregularly shaped and have an obtuse triangular cross section.

The lanceolate-spatulate, pointed or blunt leaves of the climbing shoots, tapering in a wedge shape towards the base, are thin, leathery and sessile, 5 to 12 centimeters long and 1 to 1.5 centimeters wide. The leaf base covers the stem to a third to half. The leaf veins are irregularly reticulated. Usually three longitudinal veins arise from the leaf base on each side and run parallel to one another in the outer half of the leaf blade. The tendrils are as long to twice as long as the blade, a loop can be present.

Little is known about the floor jugs. Observations in nature show that they are very small and their peristome is similar to that of Nepenthes lowii . A collection has not yet taken place.

The green air cans are 5 to 9 centimeters high, in the lower part tubular to slightly trumpet-shaped, in the upper part trumpet-shaped. Wings are missing, the ribs are inconspicuous. The jug opening, which is slightly compressed on the side, measures up to 5 centimeters in diameter. A peristome is almost completely absent and is only pronounced as a weak ring around 0.2 millimeters wide. The inner surface is almost entirely covered with 600 to 900 tiny, slightly arched glands per square centimeter, which makes the outside of the can appear slightly " hammer- blown ". The red-brown spotted lid is very narrow, wedge-shaped, up to 5 centimeters long and 0.3 to 0.4 centimeters wide below the rounded tip. The underside contains many glands, near the midrib these are elongated-round, round towards the edge. The spur is 3 to 4 millimeters long, unbranched and attaches close to the lid.

The male inflorescences are wedge-shaped clusters . The inflorescence is 5 centimeters, the inflorescence axis 12 centimeters long, at the base it measures 1.5 millimeters in diameter. The flower stalks are single-flowered, at the bottom and in the middle around 8 millimeters long, towards the top they become shorter, the highest measure around 4 millimeters. The lower flower stalks have small, thread-like bracts above the base . The bracts are elongated-round to lanceolate, tapering to a point and around 3 millimeters long and 1 millimeter wide. The stamens , including the anthers, are up to 4 millimeters long.

The female inflorescences are similar to the male, but are slightly shorter, the flower stem and flower stalks are around 3 centimeters long. The densely hairy ovary is sessile. The fruit is less tapered at the base than at the tip.

distribution

Nepenthes inermis grows exclusively on Sumatra at altitudes between 2300 and 2590 meters in mossy forests.

ecology

As one of the few known species of the genus, Nepenthes inermis grows epiphytically . Hopkins, Maulder and Salmon saw specimens piled high in trees.

The pitchers smell strongly sweet and aromatic, the percentage of prey from the group of two-winged animals is relatively high compared to other species in Sumatra. The digestive fluid contained in the jugs is extremely viscous , so it can pull extremely long threads. Experiments in culture have shown that due to the shape of the cans and the very viscous catching liquid, rainwater cannot collect in the cans and wash out the prey.

Systematics

Nepenthes inermis was first described in 1928 by the naturalist Benedictus Hubertus Danser , the specific epithet is borrowed from the Latin word in-armus (in German “unarmed”, “unarmed”).

Individual evidence

↑ ^a ^b ^c ^d ^e Benedictus H. Danser : The Nepenthaceae of the Netherlands Indies. = Contributions à l'étude de la flores des Indes Néerlandaises. XV. In: Bulletin du Jardin de Botanique. Series 3, Vol. 9, No. 3-4, 1928, ISSN 0852-8756 , pp. 249-438, ( text online ).
^ ^A ^b ^c Mike Hopkins, Ric Maulder, Bruce Salmon: A Real Nice Trip to Southeast Asia. In: Carnivorous Plant Newsletter. Vol. 19, No. 1/2, 1990, ISSN 0190-9215 , pp. 19-28, ( digital version (PDF; 1.72 MB) ).

^ ^A ^b ^c ^d Matthew Jebb, Martin Cheek: A Skeletal Revision of Nepenthes (Nepenthaceae). In: Blumea. Vol. 42, 1997, ISSN 0006-5196 , pp. 1–106, here pp. 36–37, ( digital version (PDF; 8.82 MB) ).

^ Charles Clarke: Another Nice Trip to Sumatra. In: Carnivorous Plant Newsletter. Vol. 26, No. 1, 1997, pp. 4–10, ( digital version (PDF; 1.57 MB) ).

↑ Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Birkhäuser, Basel et al. 1996, ISBN 3-7643-2390-6 .

Web links

Commons : Nepenthes inermis - album with pictures, videos and audio files

Nepenthes inermis at fleischfressendepflanzen.de

[danser-1] Benedictus H. Danser : The Nepenthaceae of the Netherlands Indies. = Contributions à l'étude de la flores des Indes Néerlandaises. XV. In: Bulletin du Jardin de Botanique. Series 3, Vol. 9, No. 3-4, 1928, ISSN 0852-8756 , pp. 249-438, ( text online ).

[trip-2] A ^b ^c Mike Hopkins, Ric Maulder, Bruce Salmon: A Real Nice Trip to Southeast Asia. In: Carnivorous Plant Newsletter. Vol. 19, No. 1/2, 1990, ISSN 0190-9215 , pp. 19-28, ( digital version (PDF; 1.72 MB) ).

[skeletal-3] A ^b ^c ^d Matthew Jebb, Martin Cheek: A Skeletal Revision of Nepenthes (Nepenthaceae). In: Blumea. Vol. 42, 1997, ISSN 0006-5196 , pp. 1–106, here pp. 36–37, ( digital version (PDF; 8.82 MB) ).

[4] Charles Clarke: Another Nice Trip to Sumatra. In: Carnivorous Plant Newsletter. Vol. 26, No. 1, 1997, pp. 4–10, ( digital version (PDF; 1.57 MB) ).

[5] Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Birkhäuser, Basel et al. 1996, ISBN 3-7643-2390-6 .