BOTANY, 99 
of two or more feet in height; the branchlets whitish or yellowish, but with scarcely a percep- 
tible pubescence. Leaves more hoary, about an inch long, involute-filiform, slender. Heads 
fasciculate, 9 or 10 lines long, about a line and a half in diameter, therefore more slender than 
those of L. pulchella; the scales of the involucre almost as strikingly five-ranked as in that 
species, but thinner, not so sharply carinate, not green on the back, and not so much pointed, 
the somewhat scarious margins, especially of the outer ones ciliate with arachnoid and appa- 
rently viscid hairs. Corolla, style, and the slender achenia nearly as in L. pulchella; but the 
bristles of the pappus rather less copious, evidently finer and softer, and unequal in length, 
therefore intermediate between that of the latter species and of L. graveolens. This species is a 
peculiarly interesting discovery, on account of the transition it establishes between L. pulchella, 
a strikingly aberrant form, and the rest of the group to which I had referred to that plant. 
LINOSYRIS (CHRYSOTHAMNUS) PULCHELLA, Gray, Pl. Wright. 1, p. 96, € 2, p. 80; Torr. in 
Sitgreaves” Hep. t. 4. Gravelly hills on the upper Canadian, September. The margins of the 
leaves are denticulate-ciliolate, which was not observed in Mr. Wright's specimens. Dr. Schultz 
(Bipont,) informs me, in a letter, that he has indicated this as a new genus, ** Tetragonospermum 
pulchellum, C. H. Schultz, Mss.” I think that the preceding species forbids its separation from 
Nuttall’s Chrysothamnus, whatever view we take of that group. 
APLOPAPPUS (BLEPHARODON) SPINULOSUS, DC. and var. GLABER, Gray, Pl. Fendl. p. 75. On 
the Canadian, and Deer creek; August, September. 
APLOPAPPUS (BLEPHARODON) RUBIGINOSUS, Torr. & Gray, Fl. 2, p. 240. Sandy bottoms of the 
Canadian; September. ; 
APLOPAPPUS (PRIONOPSIS) CILIATUS, DO. Prodr. 5, p. 346; Gray, Pl. Wright. 1, p. 98. Prairies 
on the Canadian; September. 
APLoPAPPUS (JSoPAPPUS) DIVARICATUS. Isopappus divaricatus, Torr. & Gray, Fl. 2, p. 239. 
Sand-banks of the Canadian, near the Shawnee villages; August. A state with rather larger 
heads, approaching Isopappus Hookerianus, which most probably is not distinct. 
APLOPAPPUS (ERICAMERIA) LARICIFOLIUS, Gray, Pl. Wright. 2, p. 80. White Cliff creek, New 
Mexico; on hills and rocks. Cañon creek, Western New Mexico. The flowers have all fallen; 
but there is little doubt about the species, which Dr. Bigelow formerly gathered in the Organ 
Mountains, near El Paso. 
AMMODIA OREGANA, Nutt. in Trans. Amer. Phil. Soc. T, p. 321; Torr. € Gray, Fl. 2, p 235, 
California, on the Stanislaus; May 8. This was also gathered in northern California by the 
United States South Sea Exploring Expedition, and by Mr. Allen on the Yuba river. 
STENOTUS LINEARIFOLIUS, Torr. & Gray, Fl. 2, p. 238. Cañon Pass, New Mexico; March 16, 
1854; California. 
Curysopsis HISPIDA, Hook.; Nutt. in Trans. Amer. Phil. Soc. n. ser. T, p. 316. Sandstone 
rocks and hills, on the Canadian ; August—September. 
CHRYSOPSIS FOLIOSA, Nutt. 1. c. Hilly prairies on the Canadian; September. Intermediate 
between C. villosa and C. canescens. 
HETEROTHECA GRANDIFLORA, Nutt. in Trans. Amer. Phil. Soc. n. ser. 1, p. 315. Cocomungo, 
California. ۲ š 
GRINDELIA HIRSUTULA, Hook. d: Arn. Bot. Beech. p. 147 & 351. Hill-sides, at Knight's 
ferry, on the Stanislaus, California; May 7. A narrow-leaved state. ER 
PENTACHETA AUREA, Nutt. l. ری‎ Torr. & Gray, Fl. 2, p. 249. Corte Madera, California ; 
April Very like Nuttall's original specimens, except that the leaves are broader. 
APHANTOCHJET, ANov. Gen. 
Capitulum heterogamum, 8-10-florum; floribus radii 3-5 foemineis, tubulo corolle stylo 
breviore truncato eligulato; disci 4-5 hermaphroditis, corolla tubuloso-infundibuliformi apice 
5-dentata. Involucrum circiter 10-phyllum, biseriale; squamis 29ء‎ 0 4 
