linjln exii 11 id. (_<0 M I'os I T /!<: 



42!) 



a MViuo,;r_^i,A, Eaton, 1. c t. 20, of Nortliwoston. Utali, is a more simpler i.nr.nnial species, 

 with aiiialldr 3-iloweml heads ; ami l>-^>v.3, 



a. TiiuiinKUI, (Imy, PI Thurb., a larRer-flowere.! annual or biennial of Arizona and New 

 Mexico. Iheso are the only recognized species, besides those here described. 



* « Involucre broader, about 1 0-floivered, and with some outer locales of intermediate 

 length : stem,s leafy to the top ; the short peduncles mostly naked. 

 6. S. lactucina, Gray. .Stoms a span or two lii^Mi from a perennial root 

 cnryinhosely l)ranclH!<l : loaves linear or hmceolatc, nuicinatcdenlienlato or entire' 

 elongated : mvolncm half an in.-h long, of C, to 'J inner scales, a few looser calyeu- 

 late ones, and one or two of intermediate length and diameter : akenes oblong- 

 linear, terete, very smooth, the ribs slender. — Proc. Am. Acad. vi. 552. " 



^ Wooded region of the Sierra Nevada, at about 5,000 and 6,000 feet, in and near the Marii>osa 

 se-iuoia grove {Brewer Bo/andr.r) ; also in the northern part of the State, at McCumbers (Acw- 

 >ernj), and pine woods of Mount Shasta, Brewer. Leaves 2 to 4 inches long, 2 to 4 lines wide 

 ['lowers delicate rose-color. 



more 



Se 



b. 



Flowers delicate rose-color. 



§ 3. Heads larger, about \2-fl,owpred : scales of the campanulate involucre 



numerous and imbricated in about 3 series, the outer successiveli/ shorter: 



receptacle alveolate, and the margins of the alveoli fimbriolate-hirsute : bristles of 



the pappus 15 to 20, short plumose for their whole length. — Alloseris, Gray. 



7. S. Cichoriacea, Gray. Minutely toraentose-puberulent when younc^, ri^id • 



stem 2 leet or more high, leafy below, and with virgate branches naked above • 



leaves coriaceous, lanceolate, runcinately toothed, the teeth rigid : heads somewhat 



mcemoso or panicled, short-peduncled : scales of the involucre rather loose and 



rigid, lancoolato : young nkoiios short and smooth : pappus sordid or dull wliite. — 



Proc. Am. Acad. vi. 552. 



Near Fort Tejon, Dr. Horn Leaves 4 or 5 inches long (the lower unknown), not unlike those 

 of Cichory, but rigid Involucre fully half an inch high. Corollas probably roso-color. An 

 ambiguous i.lant, both on account of the involucre, to which, however, the prece.ling species 

 Iliiil Ime "" ''"P^"'''"^ "" account of the alveolate receptacle, the short-plumose pappus, and its 



Cn^TADEM'.iA WiiEP.r,r,ni, Oray, Proc. Am. Acad. ix. 218, discovered in Southern Nevada 

 on the borders of Arizona, has been recently detected in N. W. Nevada, by I^mnwn and Cnsr so 

 near the border of the State that it may bo expected within. The plant has the a.speut of a Sir- 

 phnnomcria, or of a Lygodcsmia ,- but tiio akones of the live (hnvc-rs nin severally imrtly enclosed 

 in the cannato base of the subtending scales of tlio iiivolu.'re, and the papi.us consists of f,vo 

 ngid awnlike naked scales, having a few shorter bristles adiiatc to their base, 3 to 5 on each side 

 The root is perennial. 



111. RAFINESQUIA, Nutt. 

 Head many- (15-30-) flowered. Involucre conical-cylindraceous, of 7 to 15 

 equal linear acuminate principal scales, and a few loose and shorter calyculato ones. 

 Recej)tacle naked, flat. Akenes terete, slender, obscurely 5-ribl)ed or angled (nearly 

 smootli and glabrous, or the outermost pubescent), gradually atteiniated into a slen- 

 der beak; the broad base hollowed at the insertion, but destitute of a distinct callo.s- 

 ity. Pappus white or whitish, of 10 to 15 capillary bristles which ai-e .soniy long- 

 plumo.se from the ba.so to below the tip. — Leafy-stemmed and branching glabrous 

 annuals ; with pinnatifid leaves partly clasping at base, and rnther lar^e heads 

 terminating the paniculate branches; corollas white or flpsh-color. — Nutt. in Trans. 

 Am. Phil. Soc. n. ser. vii. 429 ; (imy, PI. "Wright, ii. 103. 



A well-marked genus (although joined to Slephannm/'ria by nenthaniX "f two known 8i>ecics, 

 both Californian, and one exclusively so. The akenes are excavated at tlip brnnd insertion in the 

 manner of Scorzonera and Aficroserii, but wholly want the callous ai)p(>n(inge. In fho fint siiociea 

 the flowers are only transiently expanded according to Nnttall, and the appeai-nnoe of all the 

 specimens conforms to this. Hut Dr. Holamlnr h.is loun<l th.in o|)eii during tlie whole ilny. 



