AND GENERA OF PLANTS. 299 
florets fifteen to twenty. Pappus exserted beyond the involucrum, as long as the florets, of two 
kinds, one bristly, the other clavellate, or wider towards the extremity. Receptacle alveolate, 
alveole with elevated, lacerated margins, much more distinctly so than in any Sericocarpus. 
Tt t Achenia smooth, flowers white. 
Eucephatus albus, leaves lanceolate linear, scabrous on the margin, remote, en- 
tire, radical ones denticulate, lanceolate; corymb few-flowered; rays fourteen 
to fifteen, white——Chrysopsis alba, Nutr. Gen. Am., Vol. IL, p. 152. Heke- 
astrum album, Decanp., Vol. V., p. 264. Certainly not a congener with H. 
paludosum, which (notwithstanding the variation of pappus) is a true Aster. 
Involucrum of three series of greenish carinated scales. 
+ t t * Lacatrea.—Inner scales of the involucrum longer; pappus scarcely 
clavellate. 
Eucephalus glaucus; smooth and glaucous; leaves linear-oblong, acute, sub- 
amplexicaule, entire; stem branching above; flowers racemose, corymbose ; 
scales of the involucrum oblong-ovate, obtuse. 
Has. Towards the sources of the Platte, and in the Rocky Mountains. Rays purplish, nar- 
row, about fourteen. Pappus slender, nearly or wholly equal; tubular florets, about fifteen to 
twenty. Flowers fastigiate, but sometimes racemose on the branchlets. Stem twelve to eighteen 
inches high. Leaves two to three inches long, smooth and somewhat coriaceous, reticulately 
veined, a little scabrous on the margin, less than half an inch wide. Scales of the involucrum 
about three series, the innermost longer, thin and acute. 
Eucephalus *ericoides; a small alpine, cespitose plant, canescently hirsute and 
glandular, with appressed short hairs; leaves subulate, minute, channelled, ci- 
liate and acute, almost imbricately approximate, erect; branching from the 
base, branches one-flowered ; rays white, about fifteen ; achenia smooth. 
Has. Towards the summit of the Rocky Mountains. Collected by Dr. James. Inula? eri- 
coides, Torrey, Lyceum Nat. Hist., N. York, 1. c. Chrysopsis ericoides, Earon’s Manual; |. c. 
About four or five inches high, with leaves about the size of those of Juniperus virginiana, and 
nearly as much imbricated as the younger leaves of that tree, about a line long and half a line wide, 
white, with appressed hairs, nearly smooth on the upper side and pointed with a bristle, the lower 
ones strongly ciliate. Involucrum ovate, campanulate, imbricated in t jual series of appressed, 
lanceolate, acute scales, membranous on the margin. Rays apparently white, or purplish, with 
exserted, filiform, smooth stigmas. Stigma in the discal florets pubescent. Pappus of rather few, 
searcely scabrous, slender white rays. No double pappus. 
