Chorizanthe. POLYGONACE.E. 



35 



iavolucros scattereJ on the slender branches, 1 ^ to 3 lines long, strongly angled and 

 sulcate, becoming corrugated, mostly 4-toothed : flowers a line long, pubescent, the 

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



On ih-y hills in the Coast Ranges, from Stanislaus County {Brewer) southward ; Fort Tcjoii 



{XaiUtis) ; on tin- Mohave Kiver, Pabticr. 



4. C. Californica, Gray. Resembling the last, but somewhat more hirsute : 

 bracts mure latt^rul, raiely perfoliate, and the disk mcjre 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. & Gray, 1. c. Macronea Californica, Benth. Linn. Trans, xvii. 419, t. 20. 



In the Coast Ranges from San Luis Obispo to San Diego. 



§ 2. Iiioolwres coriaceous, 1-Jiowered, 6-anf/led and -sidcate, the unequal divergent 

 teeth termnathig in stout cusps or aivns, mostly uncinate: Jlowers nearly 

 sessile, iw'liuled or only partially exserted, 6-cleft (rarely d-parted), fjlor- 

 hrous or bristly-villous on the midveins {rarely pubescent) : stamens 9 (rarely 

 3 or 6j, mostly adnate to the tube near the base or beloiv the middle : bract- 

 lets obsolete. More or less villous-pubescent or hirsute, not glandular, 

 fragile : bracts 1 to 3, di^stinct, often foliaceous, at least the uppermost 

 acicular-subulate : involucres usually more or less clustered or cap/date. — 

 EucHORiZANTHE, Torr. & Gray. 



% Involucres in close cymes (heads) ; margins of the teeth often scarious : stems 

 more or less leafy and the bracts mainly foliaceous. 



■i- Atargin of the involucre becoming wholly scarious and petaloid heticeen the 

 a tens (f/i')se in the forks marginless) : stem erect and heads dense. 



5. C. membranacea, Benth. Slender, floccose-tomentose, leafy, J to 2 feet 

 higli, s[)ariugly branclied above, the branches ascending : leaves linear, scattered 

 along tlie steiu, an inch or two long, acute : bracts mostly similar, cuspidate : heads 

 sessile, solitary or few upon the branches : involucres tomentose, 2 to '1\ lines long, 

 with at lengtli a broad dilated limb and equal uncinate teeth, the triangular tube 

 contracted in the middle : flowers villous, \ becoming \\ lines long, 6-parted : seg- 

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

 cel equalling the flower. — Linn. Trans. 1. c, t. 17, f. 11 ; Torr. & Gray, 1. c. 193. 



Central California, from Mendocino County to San Luis Obispo. The flower in this species is 

 that of the {irereding section. 



G. C. Stellulata, Benth. Hirsutely pubescent, 3 to 6 inches high, umbellately 

 branched above : leaves linear-oblanceolate, 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, equally toothed, the margin not broadly dilated : flowers sessile, glabrous, 

 equalling the involucre, tubular, equally 6-cleft : the segments obcordately 2-lobed : 

 stamens adnate near the base. — PI. Hartw. 333, & DC. 1. c. ; Torr. & Gray, 1. c. 



Known only from Hartiveijs specimens, collected in the "valley of the Sacramento." 



7. C. Douglasii, Benth. Eesembling the last, but the leaves verticillate in one 

 or two whorls \\\)o\\ the stem: bracts setaceous, villous, purplish: involucres 1^ 

 lines long, somewhat unequally toothed : flowers distinctly pedicelled, gla])rous, a 

 line long, not cleft to the middle: the broadly cuneate-oblong segments truncate, 

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

 DC. Prodr. xiv. 25; Torr. & Gray, 1. c. 



Collected only by Douqlas. Specimens from Santa Margarita Valley (50f & 803 Brcw,-r\ 

 referred here by Torr. & Gray, 1. c, are probably distinct, being more slender and more softly 

 pubescent, and the stem naked excepting the 3 'leafy bmcts subtending 3 slender rays ; flowers 

 sessile, bristly-villous on the midveins, the longer segments scarcely mucronate. 



