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i 



BOTANY. 



105 



small and imperfect specimens. Exterior achcnia hirsute^ as stated by Nuttall^ not tlie inner, 

 as described by Hoolver and Arnott. 



Calais platycarpha {Gvay^ in Bot.y Whij>pl. Bep. p. 113 & 114;): scaposa- foliis pinnati- 



partitis (vel integris?) glabris ; involucre calyculato ; aclieniis immaturia brevibus trimcatis, 

 paucis extimis villosis ; pappi paleis orbiculatis sen latissime ovalibus intcgcrrimis apice subito 

 brevi-aristatis, — On clayHtiillSj fSan Luis Rey, California ; Parry. The specimen, although too 

 youngj 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 clavatc^ 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. Palea? 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 Stephanomeria3. Achenia angulata, utrinque truncata, costata, costis 



5 — 10 tuberculatis. Pappus 5-15-paleatus ; paleis lineari-lanceolatis vel setiformibus inferne 

 nudis, apicem versus brevlter plumosis. — Herbfe graciles, annua? vel biennes, glabr.-e, pani- 

 culato-ramosissima3 ; ramis fere aphyllis ; floribus roseis? Species 2, nempe: 



HexMPITIUum ScnoiTii (sp. nov.): capitulis parvis 5-floris ; acheniis 5-6-angulatis pluri- 

 costatis, costis tuberculoso-scabris ; pappi paleis 5-6 rigidis lineari-lanceolatis obtusiusculis 



■ 



achenio baud longioribus infra medium nudis marginibus leviter scariosis. — Camj) Miller, valley 

 of the Gila ; May, 1855 ; Sclwtt. 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 1^ line long : pappus of rigid palete, persistent or nearly so ; 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 Bigelovii (sp. nov.): caule paniculato-ramosissimo e radice annua sen bienni ; 

 foliis radicalibus linearibus subpinnatifidis, rameis vix ullis ; capitulis 6-9-floris ; acheniis 

 5-co8tatis, costis validis rugoso-tuberculatis ; pappo achenio duplo longiore e setis fragilibus 

 12-15 basi dilatatis rariter denticulatis vel setulosis medio gracillimis nudis versus apicem 

 barbellato-plumosis. — Prontera, New Mexico ; Btgelow. 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 lengtb, 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, 



Stephanomeria mxoe, Nutt.; Gray^ in Whippl. Rep. p. 114, S. minor & S. runcinata, Nutt.; 

 Gray^ PL Wright, etc. Gravelly and rocky soil, from the Pecos, western Texas, to the Colorado 

 of the West. 



•SiEPHANOiiERiA Thurberi, Grai/, PI. Thurber,p. 325. Sierra delos Animos, Sonora; Thurher. 

 On the Santa Cruz river ; Captain Smith. Near the Cobre and Mimbres, New Mexico ; Bigdow 



14 k 





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