Nepenthes mantalingajanensis
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Nepenthes mantalingajanensis , floor jug |
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| Mink & Wistuba |
Nepenthes Mantalingajanensis is a Kannenpflanzenart from the family of pitcher plants plants (Nepenthaceae). Thespecies nativeto the Philippines was discovered in 1992 by the botanists GCG Argent and EM Romero and was first described in 2007.
description
Habitus
Nepenthes mantalingajanensis is a plant that usually grows as a native rosette and is 20 to 40 centimeters high, rarely climbing up to 300 centimeters high.
The stem axis is about 1 centimeter thick and cylindrical. The leathery leaves are formed from a 15 to 25 centimeter long and 5 to 6 centimeter wide, broad, lanceolate, apparent leaf blade , which, however, in the strict sense only represents a transformed leaf base . This is divided by a central rib, from where it starts, 2 side ribs run parallel to it.
The tendril that grows out at the tip of the leaf base is 25 to 40 centimeters long and around 3 millimeters thick, at its end it merges into the base of the pot, only then is the actual leaf blade.
Pitchers
The yellow-green to pale red, round to inverted egg-shaped, leathery pitchers are 15 to 20 centimeters, in exceptional cases up to 25 centimeters high and around 8 centimeters wide, their inside is completely glandular.
They occasionally have two fringed wings that run down from the peristome (the edge of the can opening) over a third of the height of the can and then continue as narrow ribs to the base of the can. If the wing bar is missing, it is reduced to the rib.
The can opening pointing horizontally is round. The finely ribbed, 2 to 2.5 centimeter wide peristome is cylindrical, the ribs are 1 to 2 millimeters apart, the teeth on the inner edge are 2 to 4 millimeters long, but reach lengths at the neck (the connection between the jug and lid) up to 10 millimeters.
The lid is round to heart-shaped with a diameter of 6 to 7 centimeters and has fine glands on the surface (except near the midrib). From its middle rib three side ribs go off on each side.
Flowers, fruits and seeds
Like all pitcher plants, Nepenthes mantalingajanensis is dioecious , that is, a plant is either female or male, but never hermaphroditic.
The male inflorescences are grapes , the flower stem is 30 to 35 centimeters long and 5 to 6 millimeters thick. The flower stalks carry 8 to 10 millimeter long single flowers, often with 1 millimeter long bracts at the base. The perigone consists of four oval bracts , which reach a length of around 3 millimeters and a width of around 2 millimeters. The female inflorescences are grapes, the flower stem is 30 to 35 centimeters long and 5 to 6 millimeters thick.
The pedicels of the lower flowers are 12 millimeters long, those of the upper 6 millimeters. The capsule fruits are 12 millimeters long and 5 millimeters thick, the seeds 3 to 4 millimeters long. Freshly bloomed flowers are yellow-green and later completely deep red.
Distribution and ecology
Nepenthes mantalingajanensis is only known from Mantalingajan Mountain in Palawan in the Philippines from altitudes around 2000 m.
The plants mostly grow there in open vegetation, with a stature height of no more than 1 meter, associated with grasses and rhododendron species.
Botanical history and systematics
The species was first discovered in 1992 by George Argent and EM Romero, it was first described in 2007 by Joachim Nerz and Andreas Wistuba after it was long known as “ Nepenthes spec. Palawan 1 ”had been led; the epithet refers to the homeland of the species.
According to its geographical distribution, Nepenthes mantalingajanensis is a systematic link between the Filipino species and those of Borneo . The closest relatives of the species are Nepenthes rajah in Borneo and Nepenthes mira in the Philippines.
proof
- ↑ a b c d e f g h i j k l m n o Joachim Nerz , Andreas Wistuba : Nepenthes mantalingajanensis (Nepenthaceae), a remarkable new species from Palawan (Philippines). In: The Taublatt. Issue 3, 2007, ISSN 0942-959X , pp. 17-25.
further reading
- Stewart McPherson: Pitcher Plants of the Old World. Edited by Alastair Robinson and Andreas Fleischmann . 2 volumes. Redfern Natural History Productions, Poole 2009.
- Alastair S. Robinson, Andreas S. Fleischmann, Stewart R. McPherson, Volker B. Heinrich, Elizabeth P. Gironella, Cemencio Q. Peña: A spectacular new species of Nepenthes L. (Nepenthaceae) pitcher plant from central Palawan, Philippines. In: Botanical Journal of the Linnean Society. Vol. 159, No. 2, 2009, ISSN 0024-4074 , pp. 195-202, doi : 10.1111 / j.1095-8339.2008.00942.x .
