Burmannia madagascariensis
| Burmannia madagascariensis | ||||||||||||
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| Burmannia madagascariensis | ||||||||||||
| Mart. & Zucc. |
Burmannia madagascariensis is a species ofthe Burmanniaceae family . It is native from South Africa to Madagascar.
description
Burmannia madagascariensis is an annual, leaf-green, thread-like slender, unbranched to very seldom branched herbaceous plant that reaches a height of 10 to 30 centimeters. It is semi-mycotrophic . A rhizome is absent or short and creeping, the roots are fibrous and relatively short. The leaves are three-veined, linear to linear-lanceolate and pointed, 2.8 to 14 millimeters long and 1 to 1.5 millimeters wide. They stand as a down-to-earth rosette and close to the stem, where they are pointed and 1.8 to 8.6 millimeters long and 1.2 millimeters wide.
The inflorescence is a double wrap consisting of three to five flowers . The weakly to strongly stalked flowers are 5.5 to 12 millimeters long and from very dark purple to light purple, rarely green, with yellow lobes. The flower tube is cylindrical three-cornered and 2 to 4 millimeters long, the 1 to 3.8 millimeter wide wings are halved elliptical, halved heart-shaped to halved inverted-ovoid and run from below the base of the ovary to the base of the outer lobes. The outer lobes are ovate to ovate-triangular, thin and upright, with curled or weakly curled edges and 1 to 2.3 millimeters long, the inner triangular, thin, and upright, sometimes decrepit and 0.4 to 1.3 millimeters long . The stamens are sessile and start in the pharynx, the connective has two short, lateral arms that carry the thecae . The stylus is thickened and thread-like, at its end are the three almost sessile, trumpet-shaped scars .
The ovaries are elliptical or inverted egg-shaped and 2 to 6 millimeters long. The inverted egg-shaped capsule opens along transverse slits. The seeds are yellow and elliptical.
distribution
Burmannia madagascariensis is native from Rwanda to southern Africa, Madagascar and Mauritius at altitudes between 500 and 1900 meters, rarely descending to sea level. It is found together in swamps with species of Sphagnum , Cyperaceae , Eriocaulon , Xyris , Drosera , Utricularia , Genlisea and Lobelia .
Systematics
The species was first described in 1824 by Karl Martius and Joseph Gerhard Zuccarini .
literature
- Dianxiang Zhang : Systematics of Burmannia L. (Burmanniaceae) in the Old World , pp. 218-223, in: Hong Kong University Theses Online, Thesis (Ph.D.), University of Hong Kong, 1999
Individual evidence
- ↑ Rafaël Govaerts (ed.): Burmannia - World Checklist of Selected Plant Families of the Royal Botanic Gardens, Kew. Last accessed on June 23, 2018.