Comprehensive Description
(
anglais
)
fourni par North American Flora
Franseria nivea Rob. & Fern. Proc. Am. Acad. 30: 117. 1895
Perennial, 3-10 dm. high; branches white-tomentose; leaves alternate, petioled, interruptedly pinnate; blades ovate in outline, white-tomentose on both sides, about 5 cm. long; upper part of the petioles and the rachis winged; principal divisions pinnately lobed and toothed, with small triangular ones interposed; staminate heads in terminal racemes; peduncles about 3 mm. long, recurved; involucre saucer-shaped or nearly rotate, white-tomentose, 4 mm. wide, with 9-10,short ovate lobes; paleae of the receptacle hyaline, clavate, 1-nerved; corolla with brownish angles and margins; pistillate heads in the upper axils and at the base of the staminate raceme, sessile, subtended by small leaves; fruit ovoid, 6-7 mm. long, cinereous, woody, 2-celled; beaks 2, stout, conic, 2 mm. long, somewhat curved but not hooked; spines 22-30, in 4 or 5 series, conic, scarcely curved, 1.5 mm. long.
Type locality: Plains near Casas Grandes, Chihuahua. Distribution: Known only from the type locality.
- citation bibliographique
- Per Axel, Rydberg. 1922. CARDUALES; AMBROSIACEAE, CARDUACEAE. North American flora. vol 33(1). New York Botanical Garden, New York, NY
Ambrosia nivea: Brief Summary
(
vietnamien
)
fourni par wikipedia VI
Ambrosia nivea là một loài thực vật có hoa trong họ Cúc. Loài này được (B.L.Rob. & Fernald) W.W.Payne mô tả khoa học đầu tiên năm 1964.
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