Appendicula

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Appendicula
Appendicula carnosa (fig. I) Appendicula torta (fig. II and III) Illustration in volume 2: Heinrich Gustav Reichenbach: Xenia Orchidacea (1874)

Appendicula carnosa ( fig. I)
Appendicula torta (fig. II and III)
Illustration in volume 2:
Heinrich Gustav Reichenbach :
Xenia Orchidacea
(1874)

Systematics
Order : Asparagales (Asparagales)
Family : Orchids (orchidaceae)
Subfamily : Epidendroideae
Tribe : Podochileae
Sub tribus : Eriinae
Genre : Appendicula
Scientific name
Appendicula
flower

The genus Appendicula from the family of the orchid (Orchidaceae) consists of approximately 153 species . The plants usually grow epiphytically , they occur in tropical Asia.

description

The Appendicula species grow sympodially . The rather thin shoots are branched in some species, their cross-section can be round or compressed. The stem axis is densely covered with two-line leaves . The leaf bases enclose the shoot and completely cover it, between the leaf base and blade there is a separating tissue. In some species, the leaf blades are rotated so that they all lie in one plane. The inflorescences, densely covered with several small, resupinated flowers , arise laterally from the leaf axils or are terminal, in some species both. The flowers are white, greenish or pink in color. The petals are not fused together, but the lateral sepals and the lip together with the extended base of the column (column base) form a short bulge. The lip is single or trilobal and has a backward appendage at the base. At the end of the short column is the stamen with six club-shaped pollinia in two groups. These are connected by one or two stalks with a common small adhesive disc (Viscidium). An elongated, mostly two-lobed rostellum separates the stamen from the stigma .

distribution

The species of the genus Appendicula are common in tropical Asia. In the northwest the area stretches along the southern slope of the Himalayas, to the southeast becomes southern China, rear India and the Indonesian island world, one species still reaches northern Australia. A great diversity of species can be found in Sumatra and New Guinea.

They are mostly epiphytic growing plants of ever-humid and seasonally dry tropical forests, some species prefer to grow on rocks or terrestrially.

Systematics and botanical history

The genus Appendicula is counted to the subtribe Eriinae within the tribe Podochileae. Related genera are Chitonochilus , Poaephyllum and Podochilus .

Appendicula cornuta

Appendicula was described by Carl Ludwig Blume in 1825 ; the name refers to the characteristic appendage on the lip.

The following 153 types are validly described:

See also

literature

  • Jim B. Comber: Orchids of Java . Bentham-Moxon Trust, Kew 1990, ISBN 0-947643-21-4 , pp. 193-200 .
  • Chen Xinqi, Zhu Guanghua, Ji Zhanhe, Lang Kaiyong, Luo Yibo, Phillip Cribb: Orchidaceae . In: Wu Zhengyi, Peter H. Raven (Ed.): Flora of China . tape 25 . St. Louis ( Orchidaceae (draft) ( August 12, 2007 memento on the Internet Archive ) [accessed August 6, 2008]).
  • DL Jones, T. Hopley, SM Duffy, KJ Richards, MA Clements, X. Zhang: Australian Orchid Genera. Retrieved July 11, 2009 .

Web links

Commons : Appendicula  - album with pictures, videos and audio files

Individual evidence

  1. ↑ a b Rafaël Govaerts (Ed.): Appendicula. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 5, 2020.