CHORIZANTHE. 57 



lucral bracts acicular, densely ciliate ; involucres oblong-triangular, 2-3 

 lines long; divisions unequal, slightly divergent, with scarious margins, 

 and short recurved uncinate awns; flowers shortly pedicellate, perianth 

 partly exsert; segments nearly equal, shortly mucronate, and erosely 

 denticulate at the tip; stamens 9, adnata to the lower tube, anthers 

 oval; style and akene same as the preceding; embryo with oblong 

 cotyledons, and short radicle. 



Habitat : Dry, sandy soil near Santa Cruz, June, varying greatly in 

 size according to soil or exposure. 



14. C. Breweri, Watson. "Slender, 2-4 inches high, softly pubes- 

 cent, leaves ovate or rounded, 3-6 lines broad, on slender petioles; 

 bracts foliaceous, linear-oblanceolate, pungent; heads small; involu- 

 cres 1/4 lines long, the short sHghtly unequal divisions united at base 

 by an inconsi)icuous margin, stout and curved; shortly awned; flowers 

 1/4 lines long, glabrous or villous; segments broadly oblong, the inner 

 ones shorter; stamens 9 at the base." 



Habitat: San Luis Obispo. Copied from Watson's Bot. Cal., Vol. 

 TL, p. 36. Known only from scant specimens. 



-J- -(- Involucral divisions without scarious margins; perianth segments unequal. 



15. C. VALiDA, Watson, 1. c. Stout, 6-18 inches high, villous hairy, 

 branching above; radical leaves oblanceolate, with long petioles, upper 

 leaf whorls similar and shorter; involucres smooth externally, divisions 

 slightly unequal, divergent, with straight av\ns; flowers short pedicel- 

 late; perianth segments exsert, unequal, oblong, outer entire, inner one 

 half shorter, erosely denticulate; stamens 9, partly adnate to the lower 

 tube;' anthers oblong; style and akene like the preceding. 



Habitat: Russian River, Petaluma, Cal. Acad. Herb. In general 

 habit closely resembles C. Douglasii. 



16. C. Palmeri, Watson, 1. c. Rather slender, 4-12 inches high, 

 hoary-pubescent, stems more or less copiously and irregularly branched 

 above, with capitate, axillary, and terminal cymose clusters; radical 

 leaves spathulate, with slender petioles, cauline foliaceous whorls 

 smaller and irregular, upper bracts setaceous pungent; involucres an- 

 gular, ciliate hispid on the angles, tube contracted toward the throat; 

 divisions 6 : three longer (one exceeding the others), three intermediate, 

 smaller, all divergent, curved and uncinate; flowers short pedicelled; 

 perianth segments partly exsert, outer deeply bilobed, inner shorter 

 and narrowly laciniate; stamens 9, inserted on a thickened ring at the 



[Puof. D. A. N. S., Vol. IV..] b [April 30, 1884.] 



