Toha tree
| Toha tree | ||||||||||||
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Toha tree ( Amherstia nobilis ) |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Amherstia | ||||||||||||
| Wall. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Amherstia nobilis | ||||||||||||
| Wall. |
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The Toha tree ( Amherstia nobilis ) is a rare tree in the legume family from the carob subfamily. It occurs in Myanmar , Thailand and in India, Bangladesh , New Guinea and Java .
description
Amherstia nobilis grows as an evergreen tree with a dense crown to a height of around 15-18 meters.
The alternate and stalked, slightly leathery leaves are pinnate in pairs with 12–16 leaflets . The short-stalked, about 15-25 centimeters long, bald leaflets are entire and ovate, lanceolate to elliptical, lanceolate or obovate. At the top they are pointed to tailed. The larger stipules are sloping. The young leaves are reddish to copper, bronze and appear as a conspicuous, drooping and compact group.
Loose, pendulous and terminal, long, long-stemmed and florid grapes are formed. The long-stemmed, large flowers are hermaphroditic with a double flower envelope . There are two larger, reddish, persistent and petaloid bracts and a sloping bract . There are four sepals and two are fused. There are five red petals, one large, long nailed (flag), with a yellow point at the tip, two medium-sized, obscure-lanceolate ones with a yellow point at the tip, and two very small, dull ones. The 10 (or only 9) long and protruding stamens are diadel-like, the 9 are in the lower part in a long groove, at the top of the long, tubular flower cup , they are unequal in length in the front, free part. Sometimes the free stamen is missing. The anthers are alternately unequal in size. The elongated, short-stalked ovary is attached above the throat of the flower cup. The stylus is long and thread-like with a minimal heady scar . There is a discus .
Flat, pointed, about 10-20 centimeters long, leathery-woody and bare legumes with 4-6 seeds are formed. The flat, light brownish, 2–2.5 centimeters large seeds are egg-shaped to elliptical.
Taxonomy
The first description of the genus Amherstia and the species Amherstia nobilis was in 1829 by Nathaniel Wallich in Pl. Asiat. Rare 1: 1, t. 1, 2.
literature
- Benedict Lyte: Amherstia Nobilis: Plants in Peril 28. In: Curtis's Botanical Magazine. Vol. 20, No. 3, 2003, pp. 172-176, JSTOR 45065584 .
- August Wilhelm Eichler : Flowering Diagrams. Second part, Engelmann, 1878, p. 519.
Web links
- Amherstia nobilis in Flora Malesiana.
- Amherstia nobilis at Useful Tropical Plants.