Trifolium gordejevi
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| Trifolium gordejevi | ||||||||||||
| ( Com. ) Z.Wei |
Trifolium gordejevi is a species of the genus clover ( Trifolium ). It is endemic to the southern Ussuri Valley and is considered a relic species. Besides Trifolium lupinaster , it is the only species of clover that can be found this far east.
description
Trifolium gordejevi is a perennial , herbaceous plant . The slender stem is hairy when pressed and branches out. It is creeping with drooping stolons or prostrate to ascending. The plants form relatively long, thick rhizomes .
The short stalked leaves are three-ply in the lower part. The individual feathers are between 8 and 15 millimeters long and 4 to 10 millimeters wide. The leaves of the leaflets are inverted ovoid or elliptical-inverted ovoid. They are bluntly edged and sharply serrated almost to the base. The leaf veins are protruding and end in the teeth on the leaf margin. The upper side of the leaf is glabrous, the underside pressed, finely hairy. The stipules are lanceolate to awl-shaped. They have entire margins and almost their entire length fused with the petioles that surround them. Only a short tip is free.
The inflorescence axes are axillary and shorter than the respective petiole. The inflorescences are umbrella-like panicles of two to three individual flowers . The flowers are seldom solitary. The flower stalks are hairy and 5 to 7 millimeters long. The bracts are tiny and hardly recognizable.
The hermaphrodite butterfly flowers are zygomorphic . The calyx is bell-shaped and 8 to 9 millimeters long. The calyx teeth are subpulate and about twice as long as the calyx tube. The crown is about twice as long as the chalice. It is pink and darkens to red-brown after anthesis . After the fruit has ripened, it is retained and includes the legume . The flag is between 12 and 16 millimeters long and oblong, inverted ovoid. The wings are slightly shorter than the flag and as long as the shuttle . The shuttle and the wings overlap. The ovaries have four ovules .
The legumes are 8 to 9 millimeters long and about 3 millimeters wide. They are one to two-seeded and elongated, elliptical and flattened on the sides. They are hairless and inconspicuously ribbed. The tip is short and strongly curved upwards. The seeds are spherical to ovoid and smooth.
distribution
Trifolium gordejevi is endemic to the valley of southern Ussuri between Russia and the People's Republic of China. The species grows there in crevices, on damp stones and on pebble beaches on the river bank.
Systematics
Trifolium gordejevi is now part of the subsection Lupinaster in the section Lotoidea from the genus Klee ( Trifolium ) in the subfamily of the butterflies (Faboideae) within the family of the leguminous plants (Fabaceae).
It is clear that the species is closely related to Trifolium lupinaster , the only other species of clover found this far east. Yevgeny Grigoryevich Bobrov also saw them very closely with Trifolium eximium , which Trifolium gordejevi is strikingly similar. However, both types were assigned to different subsections by Michael Zohary .
The botanical history of Trifolium gordejevi is difficult. Wladimir Leontjewitsch Komarow described the species in 1932 as Medicago gordejevi . IT Vassilczenko then moved the species into the monotypical genus Ursia in 1979 . In the meantime it was also assigned to the genera Melilotoides , Melissitus and Trigonella . The genus Ursia was only dissolved in 1987 and Trifolium gordejevi was assigned to the genus Klee ( Trifolium ).
literature
- Ernest Small: Reduction of Ursia to Trifolium . In: Taxon . tape 36 , no. 3 , August 1987, pp. 578-583 , JSTOR : 1221849 .