Chorizanthe. TULYGONACl'LE. 35 



involucres scattered on tlie slender brandies, 1^ to 3 lines long, strongly angled and 

 silicate, becoming corrugated, mostly 4-tootlied : ilowers a line long, pubescent, the 

 equal oblong perianth-segments laciniately fringed. — Torr. & Gray, 1. c. 197. 



Oil (by hills in the Coast Ilangcs, from Stanislaus County {Brewer) southwaid ; Fort Tcjoii 

 {Xanlus) ; on the Mohave Kiver, Pahiicr. 



4. C. Californica, Gray. Kesembling the last, but soniewliat more hirsute : 

 liracts more lateral, rarely perfoliate, and the disk more deeply lobed : involucres on 

 contracted branchlets and often clustered in the axils, more obtusely angled and not 

 sulcate, usually 2 - 3-toothed and 2-3-sided : segments of perianth obovate, entire. 

 — Torr. cV: (iray, 1. c. Mitcronea Californica, IJenth. Linn. Trans, xvii. 419, t. 20. 



Ill the Coast llaiigos from San Luis Obispo to San Diego. 



§ 2. Involurres coriarcous, 1-Jiowered, (j-anr/led and -sulcate, the nnequal divergent 

 teeth tcnnhtafin;/ in stout rusjts or aivns, viostlij tuicinate : fowers nearbj 

 sessile, included or onh/ partialh/ exserfed, ()-(drft {rarclij \)-paHed), gla- 

 brous or bristlji-rilloHs on the midreins {rarelij jmhesrcnt) : stamens 9 {rarclif 

 '\ or G), mostlij adnate to the tube near the base or below the middle: bract- 

 lets obsolete. Jfore or less viUous-pubeseent or hirsute, not glandular, 

 fragile: bracts 1 to 3, distinct, often foUaceous, at least the uppermost 

 acicular-subulate : involucres ■usuallg more or less clustered or cajjitate. — 

 EuciioRiZANTUK, Torr. & (iray. 



=.v Involucres in close cymes {heads) ; margins of the teeth often scarious: stems 

 more or less leafg and the bracts mainlg foliaceous. 



■h- ]\[argin of the involucre becoming vjholhj scarious and 2>ctaloi<l between the 

 awns (those in the forks niarginless) : stem erect and heads dense. 



5. C. membranacea, IJenth. Slender, floccose-tomentose, leafy, ^ to 2 feet 

 high, sjtaringiy branched above, the branches ascending : leaves linear, scattered 

 along the stem, an inch or two long, acute : bracts mostly similar, cusjiidate : heads 

 sessile, solitary or few upon the branches : involucres tomentose, 2 to 2k lines long, 

 with at length a broad dilated linil) and c(iual uncinate teeth, the triangular tube 

 coiitracte<l in the middle: llowcirs villous, i becoming Ih lines long, G-parted : seg- 

 ments spatulate, the inner narrower and slightly shorter : stamens at the base : pedi- 

 cel e(pialling the Uower. — Linn. Trans. 1. c, t. 17, f. 11 ; Torr. S: CJray, 1. c. 193. 



Central California, from Mendocino County to San Luis Ohispo. The llower in this species is 

 tliat of tlic preceding section. 



G. C. Stellulata, IJenth. Ilirsutely pubescent, 3 to G inches high, umbellatcly 

 branched above : leaves linear-oblanceolato, scattered or the upper ones opposite, 

 an inch long or less : heads few and terminal ; the upper bracts broadly acerose 

 and coarsely hirsute : involucres 2 or 3 lines long, strongly 6-costate becoming tri- 

 angular, e(]ually toothed, the margin not broadly dilated : flowers sessile, glabrous, 

 equalling tiie involucre, tubular, equally G-cleft : the segments obcordately 2dobed : 

 stamens adnate near the base. — PI. llartw. 333, & DC. 1. c. ; Torr. S: CJray, I. c. 



Known only from Ifdrttcoj.i specimens, collected in the "valley of tlie Sacramento." 



7. C. Douglasii, Benth. I'esembling the last, but the leaves verticillate in one 

 or two whorls upon the stem: bracts .setaceous, villous, purplish: involucres Ih 

 lines long, .somewhat uiuniualiy toothed : Ilowers distinctly pedicelhid, glabrous, a 

 line long, uot cleft to the midille: the broadly cuneate-obloiig segments truncate, 

 the outer cuspidate, the inner shorter and retuse : stamens adnate near the base. — 

 1)C. Proilr. xiv. 25; Torr. & Gray, 1. c. 



Collected only by Domilas. Specimens from Santa JLargarita Valley (501 & 893 Brcwrr), 

 referred here by Torr. k Cray, 1. c, are probably distinct, beiiifj more slender and more softly 

 jiubescent, and the stem naked exeeptinj? the .•? "leafy bracts subtending 3 slender rays; (lowei-s 

 sessile, bristly-viUous on the midveins, the longer sef,'nients scarcely mucronate. 



