AND GENERA OF PLANTS. , * 318 
Division I1].—CurysocomEe*. 
Receptacle naked. Capitulum wholly yellow, with or without rays, rays neu- 
ter or feminine. Pappus paleaceous or pilose, rarely wanting ; similar or 
dissimilar in the ray and disk. In the section Chysopsidet ‘Ws the | ex: 
terior short and chaffy. ese" , ¥ 
‘i “) 
* BRACHYRIS. — 
Bracuyris Euthamie. 
Has. In the Rocky Mountains, towards the upper branches of the Platte. Suffruticose. 
Brachyris * divaricata; suffruticose, glutinous, corymbosely and divaricately 
branched; leaves narrow linear, acute; flowers nearly all pedunculate; involu- 
crum turbinate, the scales ovate, rays about six, discal florets about seven or 
eight, pappus of the ray somewhat shorter, the rest elongated. 7 
Has. With the above, in the Rocky Mountains, to which it is nearly allied, but with larger and 
seldom sessile flowers. Very resinous and heavy-scented. 
*AMPHIACHYRIS. 
(Decanp. Vol. V., p. 313, as a section of BRAcHYRIS.) 
Character nearly that of Bracuyris, but with the involucrum obovate and 
bracteolate, scales few and obtuse, not herbaceous at the points. Recepta- 
cle deeply alveolate. “Rays feminine, eight to ten, oval. Discal herma- 
phrodite florets twenty-five to thirty, small. Pappus of the discal florets 
united at base, dividing into about six entire sete. Radial florets, with a 
very minute crown of scarcely visible sete.—A very distinct genus, allied to 
Hemiachyrts, but wholly different in the pappus, which scarcely differs from 
that of Grindelia, but it is united at base, and quite persistent. 
Amphiachyris dracunculoides. (Dxcanv., under Brachyris, Vol. V., p. 313.) 
I collected this plant in 1818, on the margins of - near Salt River of Ar- 
kansas. Flowerimg in September. 
4 vil.—4 D 
