Debregeasia
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Debregeasia is a genus of plants in the nettle family(Urticaceae). The sixor sospecies are mainly found in the tropics and subtropics of eastern Asia . The Debregeasia species do not have stinging hairs .
description
Appearance and leaves
In debregeasia TYPES is evergreen shrubs or small trees . The Debregeasia species do not have stinging hairs .
The alternate arranged leaves are divided into petiole and leaf blade. The simple, more or less thin, paper-like leaf blade is three-veined. The leaf margin is sawn. The underside of the leaf is often snow-white or silvery woolly hairy. The cystolites are point-shaped. The interpetiolaren, early sloping, membranous stipules are partially fused with each other, but with a clear two-piece top. The relatively small cotyledons ( cotyledons ) are wide.
Inflorescences and flowers
Debregeasia species are single- sexed ( monoecious ) or dioecious ( dioecious ). In the leaf axils stand individually or in pairs, then in dichotomous cymes , on inflorescence shafts, dense spherical inflorescences , which always contain only flowers of one sex.
The male flowers are usually four, rarely three or five-fold. The mostly four, rarely three or five bracts of the male flowers are fused at their base. These bracts , which are often depressed in the bud, have a valvate or ragged bud cover , which means that they touch without covering one another. There are usually four, rarely three or five stamens , the stamens of which are bent inward in the flower bud. In the male flowers there is a rudimentary ovary with woolly hair at its base. In the female flowers, the three or four bracts are fused to an obovate or jug-shaped tube, the throat is narrowed and there are only very short three or four perianth lobes. There are no staminodes in the female flowers. The bracts are usually fused with the ovary and fleshy; seldom they are not fused with the ovary and are membranous. In the female flowers there is an ovary , a short stylus and the brush-shaped stigma with a tuft of long hair. The ovules are orthotropic.
Fruits and seeds
The somewhat stone fruit-like achenes are obovate and somewhat flattened. The achenes are enveloped by the often fleshy, durable, enlarged, overgrown bracts. The seeds contain endosperm .
Systematics and distribution
The genus Debregeasia was established in 1844 by Charles Gaudichaud-Beaupré in Voyage autour de Monde éxécuté pendant les Années 1836 et 1837 sur la Corvette la ~ Bonite ~ ... - Botanique Atlas : Plate 90. Charles Gaudichaud-Beaupré used the type species Debregeasia velutina Gaudich. , which is now a synonym of Debregeasia longifolia (Burm. f.) Wedd. is. Synonyms for Debregeasia Gaudich. are: Leucocnides Miq. , Missiessya Wedd. , Morocarpus Siebold & Zucc. 1846 non Boehmer 1760 .
The genus Debregeasia is mainly found in the tropics and subtropics of eastern Asia . One species is also found in eastern Australia and one in northern Africa. All six species are native to China .
There are about six Debregeasia species (here with distribution):
- Debregeasia elliptica C.J.Chen : It occurs in mixed forests in karst mountains at altitudes of 100 to 1900 meters in southwest Guangxi , southeast Yunnan and northern Vietnam .
- Debregeasia longifolia (NLBurman) Weddell (Syn .: Conocephalus niveus Wight , Debregeasia dichotoma (Blume) Wedd. , Debregeasia libera Chien & CJChen in CJChen , Debregeasia velutina Gaudich. , Missiessya velutina Wedd. , Morocarpus dichotius ( Burmolus longifus Blume , Morocarpus dichotius Blume , CJChen) .) Flower , Morocarpus velutinus flower , Urtica angustata flower , Urtica dichotoma flower , Urtica longifolia Burm. F. ): It is widespread from the Indian subcontinent via Cambodia , Laos , northern Myanmar , Thailand , via China and Vietnam to Malaysia , Indonesia and the Philippines .
- Debregeasia orientalis C.J.Chen (Syn .: Debregeasia edulis auct. ): It occurs in northeast India , in Bhutan , Nepal and China , in Taiwan and Japan .
- Debregeasia saeneb (Forsskål) Hepper & Wood (Syn .: Boehmeria hypoleuca (Steud.) Hochst. Ex A.Rich. , Debregeasia hypoleuca (Steud.) Wedd. , Debregeasia salicifolia (Roxb. Ex D.Don) Rendle , Procris hypoleuca Steud . , Rhus saeneb Forssk. ): The wide distribution area includes Eritrea, Ethiopia , Saudi Arabia , Yemen and Afghanistan , southwestern Xinjiang and southern Xizang , Nepal, India and Pakistan .
- Debregeasia squamata King ex Hook. f. (Syn .: Debregeasia spiculifera Merr. ): It occurs in Vietnam, Thailand, Malaysia and in northern Borneo .
- Debregeasia wallichiana (Weddell) Weddell (Syn .: Missiessya wallichiana Wedd. , Debregeasia ceylanica Hook. F. , Debregeasia leucophylla Wedd. , Morocarpus ceylanicus (Hook. F.) Kuntze , Morocarpus wallichianus (Wedd.) In flower. ): southern Yunnan, Nepal, Bhutan, Sikkim , India, Sri Lanka , eastern Bangladesh , Cambodia, northern Myanmar and Thailand.
use
The fibers from the logs are used to make ropes and fishing nets. The fruits are eaten or made into wine.
swell
- Chen Jiarui, Ib Friis & C. Melanie Wilmot-Dear: Debregeasia , p. 185 - same text online as the printed work , In: Wu Zhengyi, Peter H. Raven & Deyuan Hong (eds.): Flora of China , Volume 5 - Ulmaceae through Basellaceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2003. ISBN 1-930723-27-X .
Individual evidence
- ↑ a b c d e f g h i j Chen Jiarui, Ib Friis & C. Melanie Wilmot-Dear: Debregeasia , p. 185 - same text online as the printed work , In: Wu Zhengyi, Peter H. Raven & Deyuan Hong (eds .): Flora of China , Volume 5 - Ulmaceae through Basellaceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2003. ISBN 1-930723-27-X .
- ^ Debregeasia at Tropicos.org. Missouri Botanical Garden, St. Louis
- ^ A b Debregeasia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
