20 ERYTHEA. 
large corolla quite circular by the overlapping of the num- 
erous broadly obovate or almost obcordate yellow petals. 
A most beautiful alpine or subalpine species of the Rocky 
Mountains in Colorado, Wyoming, and Idaho, apparently 
somewhat rare, but gathered sparingly, and in poor speci- 
mens even by Hall and Harbour, in whose collection it is 
mixed with R. adoneus as far as distributed. Better speci- 
mens have been obtained by Mr. Buffum of Laramie. 
x Ranunculus Missouriensis. Stems slender, decumbent, 
rooting at the lower joints, very leafy: leaves ample, 2 inches 
broad, scarcely as long, short-petioled, triternate, 7. e. divided 
into 3 cuneate-flabelliform parts, these ternately parted and 
their segments deeply cleft: inflorescence terminal, naked or 
small-bracted, of a few slender peduncles: petals round- 
obovate, 14 lines long: head of achenes oblong-ovoid; 
achenes small and long-beaked, the body more than half 
encircled by a very prominent callous margin. 
A Missouri species, distributed by Mr. Bush. Manifestly 
allied to the common yellow-flowered water crowfoot, but 
very distinct by its broad geranium-like leaves and much 
elongated head of achenes. 
Erigeron oxyphyllus. Erect, 2 feet high or somewhat 
less, from a suffrutescent base; stems stoutish, simple up to 
the somewhat fastigiate rather small corymb, striate-angled, 
the whole plant glabrous: leaves 2 or 3 inches long, linear, 
acute at both ends, rather few and scattered, those of the 
branches of the corymb reduced to subulate and somewhat 
appressed bracts: heads hemispherical, 4 lines broad and 
nearly as high; bracts of involucre much imbricated, very 
slenderly subulate, obscurely glandular-puberulent. 
An uncommonly well marked species of Arizona, collected 
near Yucca, 1884, by Mr. Marcus Jones and distributed as 
E. peucephyllus, to which species it does not bear resem- 
blance in any way. 
Erigeron Covillei. Erect, 1 to 14 feet high from a deep 
seated perennial root or rootstock; stem very rigid and 
