Decaisnea insignis
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Branch with leaves and fruits |
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| ( Handle. ) Hook. f. & Thomson |
Decaisnea insignis is a species of the genus Decaisnea within the finger fruit family(Lardizabalaceae). It is common in eastern and southern Asia.
description
Appearance and leaf
Decaisnea insignis grows as a deciduous shrub that can reach heights of up to about 5 meters. The strong but brittle branches are with Mark filled and have a yellow rind . The lenticels are circular to elliptical in shape. The egg-shaped winter buds have a pointed tip and the outer bud scales are warty.
The alternate leaves are arranged in a petiole and a leaf blade. The petiole is 10 to 20 centimeters long. The pinnate compound leaf blade is 30 to 80 centimeters long and has 13 to 25 pinnate leaves. The membranous pinnate leaves are egg-shaped to oblong-egg-shaped with a length of 6 to 14 centimeters and a width of 3 to 7 centimeters. The blue-green underside of the leaflets is mealy-hairy and bald with age, while the upper side is glabrous. The base of the leaflet is rounded to broadly wedge-shaped and the tip of the leaflet is pointed to tail.
Inflorescence and flower
Decaisnea insignis is single sexed ( monoecious ). The flowering period extends from April to June, at least in China. The flowers are in a terminal, racemose inflorescence , which is 25 to 40 centimeters long. The bracts are narrow-linear with a length of 0.6 to 0.8 centimeters. The flower stalk is 0.5 to 2 inches long.
The functionally unisexual flowers are radial symmetry and threefold. The six sepals , which overlap almost like a roof tile, are ovate-lanceolate to narrow-lanceolate with a long, pointed upper end, grooved and powdery, finely hairy or glabrous. There are no petals . In the male flowers, the three outer sepals are 1.7 to 2, rarely up to 3 centimeters long and the three inner sepals are slightly shorter. Each male flower has six stamens 0.8 to 1 centimeter long . The 3 to 4.5 millimeter long stamens are and are to a thin tube. The free anthers are about 3.5 millimeters long, consist of two counters and open with longitudinal slots. The connective ends in a 2 to 2.5 millimeter wide, flattened horn-shaped appendage. The sterile carpels are about half as long or rarely as long as the stamen tube. In the female flowers, the approximately 1.5 millimeter large staminodes are fused together like a ring and the free-standing anthers are 1.8 to 2 millimeters in size. In the female flowers, too, the connective ends in a horn-shaped appendage that is 1 to 1.8 millimeters in size. The three fertile carpels are conical with a length of 0.5 to 0.7 centimeters. The crooked scar is horseshoe-shaped.
Fruit and seeds
The fruits ripen in China from July to August. The hanging bluish black colored fruits have a warty surface which can have ring-like markings and are cylindrical with a length of 5 to 10 centimeters and a diameter of around 2 centimeters. Their tip is wedge-shaped and the seam on the underside of the fruit forms a conical navel. The brown to black seeds are obovate to oblong and about 1 centimeter in size.
Occurrence
The natural range of Decaisnea insignis s. l. lies in eastern and southern Asia. It extends over the Chinese provinces of southern Anhui , southern Gansu , eastern Guangxi , Guizhou , Hubei , Hunan , Jiangxi , southern Shaanxi , Sichuan , Yunnan , eastern Zhejiang as well as south-eastern Tibet , northern Myanmar , Bhutan , Nepal and the two Indian ones States of Arunachal Pradesh and Sikkim .
Decaisnea insignis thrives in China at least at altitudes of 900 to 3600 meters in mixed forests, on mountain slopes and in damp locations in ravines.
Taxonomy
The first description as Slackia insignis was in 1855 by William Griffith in Itinerary Notes of Plants Collected in the Khasyah and Bootan Mountains , Volume 2, page 187. The new combination to Decaisnea insignis (Griff.) Hook. f. & Thomson was published in 1855 by Joseph Dalton Hooker and Thomas Thomson in Proceedings of the Linnean Society of London , Volume 2, pages 349-350. Perhaps Decaisnea fargesii is Franch. a synonym for Decaisnea insignis (handle.) Hook. f. & Thomson , then the genus Decaisnea would be monotypical .
use
The fruits of Decaisnea insignis are edible.
swell
literature
- Dezhao Chen, Tatemi Shimizu: Lardizabalaceae . Decaisnea. In: Wu Zhengyi, Peter H. Raven, Hong Deyuan (eds.): Flora of China . Caryophyllaceae through Lardizabalaceae. Volume 6. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 2001, ISBN 1-930723-05-9 , Decaisnea insignis , pp. 440 (English, Decaisnea insignis - online - this printed work is online with the same text).
Individual evidence
- ↑ a b c d e f g h i Dezhao Chen, Tatemi Shimizu: Lardizabalaceae . Decaisnea. In: Wu Zhengyi, Peter H. Raven, Hong Deyuan (eds.): Flora of China . Caryophyllaceae through Lardizabalaceae. Volume 6. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 2001, ISBN 1-930723-05-9 , Decaisnea insignis , pp. 440 (English, Decaisnea insignis - online - this printed work is online with the same text).
- ^ Decaisnea insignis in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved May 24, 2015.
- ^ Decaisnea insignis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed on May 24, 2015.
