Neuwiedia borneensis
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Neuwiedia borneensis is a kind of the genus Neuwiedia in the family of orchid (Orchidaceae). The herbaceous plants are about 40 cm tall and come from Borneo .
description
Neuwiedia borneensis grows to 35 to 60 cm. The roots are 2 to 4 mm in diameter, they are branched and occasionally form thickenings at the ends. The leaves are linear, their size varies from 2.5 cm in length by 0.5 cm in width to 45 cm in length by 5.5 cm in width. There are nine to 31 leaf veins, seven of which are clearly visible.
The inflorescence is a terminal cluster , it is 8 to 13 cm long and does not protrude beyond the leaves. Flowering plants were found in September, November and January. One inflorescence contains 40 to 75 white, 16 to 21 mm large flowers . Inflorescence axis, bracts and petals are hairy, wherein the density of the hair varies between different individuals. The hairs are not glandular and of different lengths, the longest measuring 0.19 to 0.26 mm. The bracts are linear, they end pointed, their length is 5 to 20 mm, the width 1 to 5 mm. The flower stalk is 2 to 4 mm at 0.5 to 0.8 mm diameter, the oval ovary measures 6 mm in length at 3 to 4 mm in diameter. The petals are all quite similar: the sepals are more or less hairy on the outside, elongated-oval shaped, 8 to 12 mm long and 3 to 4 mm wide. The petals are provided with a longitudinal keel on the outside, this is hairy. At 3.2 to 4.5 mm, they are barely wider than the outer petals. One lip is hardly differentiated, it is slightly wider (3.5 to 4.5 mm) than the other two inner petals. All petals have a small 0.4 to 1 mm long attached tip. The column consists of three stamens and the stylus , the mm over a length of 1 to 2, fused together at the bottom. The free part of the stamens measures 0.5 to 1.5 millimeters, the anthers are lanceolate, 3.2 to 3.3 mm long and 1 mm wide. The free part of the stylus measures 5 to 6 mm and thus protrudes over the stamens. The scar is round or three-lobed, with a diameter of 1 to 1.2 mm, significantly wider than the stylus, which has a diameter of 0.4 to 0.6 mm. The fleshy fruit measures 8 to 9 mm in length and 4 to 5 mm in diameter and is likely to burst when ripe. It is round in cross-section, at the front it ends in a 1.5 to 2 mm long tip. The seeds consist of an oval central part and two thread-like appendages.
Occurrence
Neuwiedia borneensis grows in northwest Borneo. The locations are on wet, nutrient-poor sandy soils.
Systematics and botanical history
Neuwiedia borneensis was first described in 1969 by Eduard Ferdinand de Vogel using plants that Ridley had collected. De Vogel compares Neuwiedia borneensis with Neuwiedia griffithii , which also has glandless hair, from which it differs in details of the flower, the fruit and the seeds. A DNA analysis of some species from the subfamily Apostasioideae , including the three Neuwiedia species Neuwiedia borneensis , Neuwiedia veratrifolia and Neuwiedia Zollingeri , resulted in the following cladogram :
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Individual evidence
- ↑ a b c d Eduard Ferdinand de Vogel: Monograph of the Tribe Apostasieae (Orchidaceae) . In: Blumea . tape 17 , no. 2 , 1969, p. 313-350 .
- ↑ A. Kocyan, Y.-L. Qiu, PK Endress, E. Conti: A phylogenetic analysis of Apostasioideae (Orchidaceae) based on ITS, trnL-F and matK sequences . In: Plant systematics and Evolution . tape 247 , 2004, pp. 203-213 , doi : 10.1007 / s00606-004-0133-3 .