Apostasia odorata
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Apostasia odorata is a kind of the genus Apostasia and thus belongs to the family of orchid (Orchidaceae). The herbaceous , up to 40 centimeters large plants inhabit an area in tropical Southeast Asia.
description
Apostasia odorata forms a rhizome 2 to 4 millimeters in diameter, it is surrounded by dry, 2.5 to 10 millimeter long lower leaves. The roots arise not only along the rhizome, but also above ground in the area of the lower leaves. Their diameter is 1.5 to 4 millimeters.
The ascending, mostly unbranched shoots reach heights of 15 to 40 (up to 50) centimeters and carry the regularly and densely arranged leaves . The leaves are oval to linear in shape, they measure 11 to 35 centimeters long and 1 to 2 centimeters wide (the "Flora of China" gives somewhat smaller dimensions). The leaf base is wedge-shaped in a 1 to 2 centimeter long petiole, which surrounds the shoot and completely covers it. The leaf blade contains 20 to 37 longitudinal veins, of which three to five stand out clearly. The tip of the leaf is combined into a tip over a length of 0.5 to 2 centimeters. The leaf margin can be very finely serrated.
The inflorescence is terminal, mostly it is bent over to drooping. In addition to the main axis, there are usually one to five minor axes, each bearing around ten to 20 flowers . These are yellow, rarely whitish in color and measure 1.8 to 3.8 centimeters. Sepals and petals hardly differ, they are each 1 to 2.2 millimeters wide and 6.5 to 11 millimeters long, they have a 0.5 to 1.5 millimeter long tip. The lip can hardly be distinguished from the other petals, it can be a little narrower or a little wider and is convex in shape. The column arises from two fertile stamens , a staminodium and the stylus , which are all fused together at the base. It can be straight or strongly curved, at the base it has two appendages. The free part of the stamens measures 1 to 2 millimeters, the anthers are somewhat asymmetrical, as one chamber is longer than the second. The staminodium is shorter than the stylus, the end is free to 0.4 (1) millimeters. The stylus is about as long as the stamens, its free part measures 4.5 to 6 millimeters, it has a rounded or slightly three-lobed stigma at the end . The resulting capsule fruit measures 20 millimeters in length and 1.5 to 2, rarely up to 2.6 millimeters in diameter.
The "Flora of China" specifies the flowering time from May to June, while de Vogel observes a year-round flowering time over the large distribution area.
Occurrence
Apostasia odorata is widespread in tropical Southeast Asia. The northern limit of distribution runs from northeast India through southern China. To the southeast, the area stretches across back India and Malaysia to the Indonesian islands of Sumatra and Sulawesi . Altitudes from 700 to 1400 meters, more rarely up to 1700 meters, are populated. The locations are in the shade of evergreen, moist forests. In Java only the southwest of the island is populated at altitudes of 1000 to 1200 meters.
Botanical history
Apostasia odorata was first described by Carl Ludwig Blume in 1825 . It is the type species of the genus Apostasia . The name odorata means "fragrant". Within the genus Apostasia , de Vogel places Apostasia odorata in the Apostasia section ; In contrast to the Adactylus section, these plants have a staminodium.
literature
- EF de Vogel: Monograph of the Tribe Apostasieae (Orchidaceae) . In: Blumea . tape 17 , no. 2 , 1969, p. 313-350 .
Individual evidence
- ↑ a b c d e f g EF de Vogel: Monograph of the Tribe Apostasieae (Orchidaceae). In: Blumea. Volume 17, No. 2, 1969, pp. 343-344.
- ↑ a b c Chen Xinqi, Stephan W. Gale, Phillip Cribb : Apostasia odorata . In: Wu Zhengyi, Peter H. Raven (Ed.): Flora of China . tape 25 : Orchidaceae . Missouri Botanical Garden Press, St. Louis 2009, ISBN 978-1-930723-90-0 , pp. 20 ( eFloras.org ).
- ^ Rafaël Govaerts (Ed.): Apostasia odorata. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew .
- ↑ Jim B. Comber: Orchids of Java . Bentham-Moxon Trust, Kew 1990, ISBN 0-947643-21-4 , pp. 17-18 .