niennospcnna. CO M PCS IT. K. 395 



1. S. Fremontii, (5r;iy. Two or tliroo iiichos Iil^'li, much rcsciubling Adino- 

 h'pin Wttlhicn: l(!aves spiifculato or narrow cuncatc, .'J-lolu-d at l.li(i apex, or some- 

 times nearly entire : earliest liead slender-peiluncled, the otliers clustered : Uowcra 

 golden yellow. 



In the desert region of tlio soutlieiistern borders of the .'^talo (Soda Lake, Dr. Cooper), and in 

 S. Nevada and Utali {Fremont, Ncicbcrrij, Capt. JJishop, rnhncr). Ilea.ls 3 lines, rays barely 2 

 lines long. 



82. TRICHOPTILIUM, day. 



Head many-ilowored ; tlio flowers all perfect and tubular. Involucre hemispher- 

 ical, of about 10 ovate-lanceolate thin-herbaceous almost eipial scales, somewhat in 

 two series. Receptacle flat and naked. Corolla cylindiaceous, Avith 5 short and 

 sproadin<; ovato lobes ; fdaments inserted just alwve its base. Style-branches with 

 dilated and very obtuse or truncate tips, but no proper appendage. Akencs oblong- 

 turbinate, hirsute. Pappus of 5 broad hyaline or at length firmer nerveless chafTy 

 scales, -which arc dissected into slender but rather rigid bristles, the middle ones 

 little shorter than tho corolla. — A single species. 



1. T. incisum, Gray. A small and depressed winter-annual, diffusely branched 

 from tho root, a span or less in height, clothed throughout with long and loose or 

 somewhat deciduous white wool, under which it is somewhat hirsute or glandular : 

 leaves alternate or the lower opposite, oblong-cuneate or si)atulate, coarsely and 

 sharply toothed or cut-lobed : heads (about 4 lines long) solitary on slender petlun- 

 cles, tho earlier ones scapo-liko : corolla " yellow." — 15ot. Me.x. Pxnind. 97; Torr. 

 IV.if. \{. Rep. v., t. f). 



Gravelly hills, of the Colorado desert region near Fort Ynina, Mohave, kv., Fremont, Thurhry, 

 Lieut. Dn Bnrrii, Cooper. Tho latter, who fonnd it in ravines of the Caldo Valley, states that 

 tho flowers are yellow. Akenes inenibranaecous, slightly f) - (inerved, soniewlmt angular : mp- 

 pus-scales (including the bristles, of which the outer are regularly shorter) about the length oi 

 the akene. 



83. BLENNOSPERMA, bes.s. 



Head many-flowered, with 5 to 12 pistillate rays, atid sometimes as many apeta- 

 lous pistillate flowers ; tho disk-flowers numerous, all sterile. Scales of the hemi- 

 apherical involucre 5 to 12, in a single series, equal, oblong, jdane, membranaceous, 

 somewhat united at base. Receptacle flattish, naked. Rays an elliptical or oblong 

 entire ligule sessile on the ovary, without a tube. Corollas of the disk-flowers with 

 narrow tube abruptly expanded into the broadly campannlate 4 - 5-lobcd limb. 

 Anthers oval. Style in the fertile flowers with flat linear or oblong stigmatic lobes, 

 in the staminate flowers undivided and capitate or disk-sliaped at summit : tlioso 

 flowers with barely a rudiment of ovary. Fertile (ray) akenes pyriform, obscurely 

 8-10-ribbed, destitute of pappus, powdered as it were with pa])illro which when 

 moistened apparently develop into jelly. — Low and difl'usely bmnching annuals 

 (of Chili and California), glabrous or nearly so j with alternate leaves pinnately 

 parted into narrow linear divisions, and rather small pedunculate heads of light 

 yellow flowers, terminating the brapches. — Torr. & Gray, Fl. ii. 272; Gray, Proc. 

 Am. Acad. ix. 200. 



1. B. Californicum, Torr. Sc Gray. About a span high : !><'id."s of the involu- 

 cre and rays 7 to 12 : a series of pistillate flowers within and alternating with the 

 rays : style-branches of the fertile flowers oval or oblong, flat. — Coniothele Cah- 

 fornir.a, DC. 



