BOTANY. 105 
small and imperfect specimens. Exterior achenia hirsute, as stated by Nuttall,” not the inner, 
as described by Hooker and Arnott. 
CALAIS PLATYCARPHA (Gray, in Bot., Whippl. Rep. р. 113 & 114,): scaposa foliis pinnati- 
partitis (vel integris?) glabris ; involucro calyculato ; acheniis immaturis brevibus truncatis, 
paucis extimis villosis ; pappi paleis orbiculatis seu latissime ovalibus integerrimis apice subito 
brevi-aristatis.—On clay hills, San Luis Rey, California; Parry. The specimen, although too 
young, affords characters which well distinguish this from the cognate C. Douglasii. The leaves 
are cut into numerous short and crowded lobes, and are as long as the young scapes. Involucre 
only 4 lines long, consisting of 8 or 10 oblong and rather obtuse scales of equal length, and of 
a few short calyculate scales. The young achenia are oblong, rather clavate, and largest at the 
truncate apex ; it is not likely that they become rostrate or even tapering at the apex. Some of 
the exterior ones are hairy, more so than in C. Douglasii; the others are glabrous, except a 
minute papillose pubescence on the ribs. Pales of the pappus 5, nearly 3 lines long, fully 2 
lines wide, entire, the midrib abruptly exserted into a scabrous awn of only one-third the length 
of the scale itself. 
HEMIPTILIUM, Nov. Gen. 
Capitula et habitus Stephanomerie.  Achenia angulata, utrinque truncata, costata, costis 
5 一 10 tuberculatis. Pappus 5-15-paleatus; paleis lineari-lanceolatis vel setiformibus inferne 
nudis, apicem versus breviter plumosis.—Herbe graciles, annus vel biennes, glabra, pani- 
culato-ramosissime ; ramis fere aphyllis; floribus roseis? Species 2, nempe: 
HEMPITILIUM бспоттп (sp. nov.): capitulis parvis 5-floris; acheniis 5-6-angulatis pluri- 
costatis, costis tuberculoso-scabris; pappi paleis 5-6 rigidis lineari-lanceolatis obtusiusculis 
achenio haud longioribus infra medium nudis marginibus leviter scariosis.—Camp Miller, valley 
of the Gila; May, 1855; Schott. Only branchlets or branches were collected; these bear 
merely small subulate bracts in place of leaves, and racemose-panicled small heads. Involucre 
only 3 lines long. Branches of the style clavate, glabrous. Color of the flowers not recorded. 
Achenia 14 line long: pappus of rigid palez, persistent or nearly во; the plumose hairs borne 
at the upper part not much longer than the breadth of the palea. "The plant resembles Ste- 
phanomeria paniculata in aspect. 
HEMIPTILIUM BIGELOVI (sp. nov.): caule paniculato-ramosissimo e radice annua seu bienni ; 
foliis radicalibus linearibus subpinnatifidis, rameis vix ullis; capitulis 6—9-floris; acheniis 
5-costatis, costis validis rugoso-tuberculatis ; pappo achenio duplo longiore e setis fragilibus 
19-15 basi dilatatis rariter denticulatis vel setulosis medio gracillimis nudis versus apicem 
barbellato-plumosis.—Frontera, New Mexico; Bigelow. Plant with the aspect of Stephano- 
meria minor, (with which it has probably been confounded,) but perhaps more upright. Invo- 
lucre 4 or 5 lines long ; the ligules exserted to about the same length, apparently white or rose- 
color. -Achenia with thick corky ribs, or strong angles. Pappus white, fragile, at the summit 
appearing like that of a Stephanomeria, although rather less plumose, but naked below, and 
paleaceous at the base. 
SrEPHANOMERIA MINOR, Nutt.; Gray, in W hippl. Rep. p. 114. S. minor & 8. runcinata, Nutt.; 
Gray, Pl. Wright. etc. Gravelly and rocky soil, from the Pecos, western Texas, to the блога 
of ће West. | 
SrEPHANOMERIA Тнгввеві, Gray, Pl. Thurber, p. 325. Sierra de los Animos, Sonora; Thurber. 
On the Santa Cruz river; Captain Smith. Near the Cobre and Mimbres, New Mexico; Bigelow, 
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