AND GENERA OF PLANTS. 365 
opposite, the rest alternate ; lower sepals foliaceous, squarrose, the inner linear-lanceolate. Rays 
fifteen to twenty, twice as long as the disk, two-toothed at the tip, wholly abortive, pale yellow; 
discal florets cylindric, narrower below, with five erect, blunt, pubescent teeth. Stigmas some- 
what ovate, with a short pubescence. Achenium obovate, compressed, ciliated, with two to four 
subulate, rather wide awns from the angles, and about four minute, intermediate, obtuse squa- 
melle; the awns scarcely as long as the achenium. 
Leigha * lanceolata; herbaceous, nearly smooth; stem terete, grooved, about 
three or more flowered; intermediate leaves opposite, above and below alter- 
nate, lanceolate, acuminate at each extremity, entire, petiolate, three-nerved ; 
involucrum foliaceous, subsessile; sepals linear-lanceolate, squame retuse; 
achenium short, obcordate, with two to three slender, persistent awns, twice 
its length, the intermediate squamelle minute. 
Has. Rocky Mountain plains and Upper California? Perennial; st Ive to eighteen inch 
high; smooth below; lower leaves six to eight inches jong;-an Soli broad, 5 hitie pildigs Rays 
about twelve to fourteen, pubescent beneath, twice as long as the disk, deep yellow. Palew retuse, 
pubescent at the tip. Achenium compressed, alated, smooth, (not ciliated,) short and obcordate, 
with two or three very long, slender, scabrous, awns from the two compressed angles; squamelle 
minute, acute, (in the germ appearing like mere hairs.) Mature seed not seen, in the ie 
it somewhat resembles that of Actinomeris. 
Leighia? Hookeriana. Helianthus Hookerianus; ew V., p. 590. 
H. longifotus; Hoox. Flor. Bor. Am., Vol. I. p. 313, non. Pursn. Nearly 
allied to the preceding, but with obtuse leaves, and broad, lanceolate, ciliate 
sepals. The pappus apparently almost the same. 
Leighia longifolia. Helianthus longifolius; Porss, non. Hooker. Interme- 
diate squamelle of the achenium minute, mixed with a terminal ‘gf of hairs; 
the rest of the fruit smooth.+ i 
+ To complete the history of this genus I will add the following species, collected in some = 
of South America, by the late indefatigable’ Doctor Baldwin. 
Leighia * Baldwiniana; herbaceous and scabrous, (apparently decumbent;) leaves piietéa, 
linear-oblong, entire, acute, sessile, three-nerved, the nerves running contiguous to the revolute 
margin; panicle few-flowered, subcorymbose; sepals linear-lanceolate, acuminate, imbricate and 
squarrose, somewhat ——— achenium villous. 
; like Hels, h rae A Rr 4 ta + 1 eee gies 1 he ee : 
Has. South A Z tif g Stigma 
pubescent, thick and sbi Pappus of two awns, ae shout oi six pilose, narrow, indistinct scales. 
Leighia * debilis; herb dd bent; stem terete, slender, and scabrous, wells sparsely 
pilose above, t the base of the i ] RF se J i} opposite li J te, serrate, 
? eed cares ase ’ €; . 
“a 
Vil.—4 R am ae 
