AND GENERA. OF PLANTS. 391 



merits in the central florets merely filiform. — An exceedingly branched herb, 

 with a smooth stem. Leaves alternate, small, linear-oblong, imbricately 

 crowded on the branchlets and around the capitulum, remarkable for their 

 abundant, soft, white, silky hairs, thickly spreading from the margin, so as 

 to resemble almost the foot of a hare. Capitulum terminal, sessile among 

 the leaves. Rays wide and conspicuous, three-lobed, very evanescent, and 

 convolute when withered. Allied to Madia, but with a very different habit 

 and distinct achenium, almost exactly like that of Parthenium. — (Named 

 from the leaves being clad with long, soft hairs.) 



Lagophylla * ramosissima; vl 



Hab. In the prairies near Walla-Walla, in Oregon. Stem two or three feet high, exceedingly 

 branched; smooth and shining, brownish. Leaves deciduous from the lower part of the stem and 

 branches; upper branchlets very numerous, alternate, short and one-flowered, crow^ded with small 

 linear-oblong leaves. Leaves about a third of an inch long, less than a line wide. Rays pale 

 yellow, and large, but very evanescent, only expanding, apparently, in the sun-shine. Achenium 

 black and shining, three-sided by an internal carination, without any of the elegant granulations 

 visible on the seeds of Madia. Slightly bitter from minute glands on the surface of the leaves. 



HARTMANNIA. (Decand.) 



Hartmannia *glomerata; O, hirsute; leaves alternate, pinnatifid, sessile, 

 upper ones entire; stem branching above; flowers in terminal clusters; rays 

 about five, dilated oval, trifid at the summit; achenium gibbous, muricate and 

 rugose, in the ray naked, in the disk infertile with a six to eight-leaved, acute, 

 paleaceous pappus. 



Hab. St. Pedro, Upper California. Common; flowering in April. Involucrum viscid and 

 fragrant, as well as the bractes and upper leaves. A very elegant species with abundance of bright 

 yellow flowers, in dense clusters; sepals and bractes lanceolate, acute; sterile flowers six to eight, 

 surrounded by a nearly entire pentangular involucrum. Pappus six to eight, acute, lacerated 

 scales, nearly half the length of the floi-et. The plant six to eighteen inches high, and more or less 

 hirsute. 



*OSMADENIA. 



Capitulum many-flowered, radiate; rays feminine, about five, long tubular, 

 with the border equally three-cleft to its base. Discal florets hermaphrodite, 

 tubular and attenuated, the border deeply five-toothed and glandularly pu- 



