154 POLY GONE ^. 



exserted, 6-parted or -cleft ; bractlets minute or obsolete. Stamens 9 

 (rarely 6 or 3). Achenes triangulai-. 



* Villous or hirsute; involucres usually clustered, 6-anqled and snlcafe, 



the teeth cuspidate; bractlets obsolete: perianth 6-cleft, the sta)iteiis 



inserted at or near its base. — Chorizanthe proper. 



■^Erect or erect-spreading ; involucres mostly in dense cyrnuse clusters. 



•M- Margins of inrolucral loJies scarious. 



1. C. membranacea, Benth. Trans. Linn. Soc. xvii. 419. t. 17 (1837). 

 Floccose-tomentose, erect, sparingly branched, with long internodes and 

 leafy nodes, }4 — 2 ft. high : leaves linear, acute, 1 — 2 in. long : bracts 

 similar to the leaves but cuspidate : heads sessile, solitary or few upon 

 the branches : involucres tomentose, 2 — 2% lines long, the limb at 

 length dilated and with uncinate teeth : tube contracted in the middle : 

 perianth villous, becoming II2 lines long, 6-parted, the segments oblong 

 or spatulate : achene broadly triangular and rostrate-attenuate. — In 

 rocky places among the foothills and lower mountains. May. 



2. C. stellulata, Benth. PI. Hartw. 333 (1849). Pilose-pubescent, 

 3 — 6 in. high, umbellately branched from near the base: leaves scattered, 

 or the upper opposite, 1 in. long, linear-oblanceolate : invohicres solitary 

 in the lower axils, capitate-congested at the ends of the branches ; tube 

 strongly (j-costate, becoming triangular, the angles ciliate or glabrous ; 

 segments equal, with not greatly dilated scarious margins, the awns 

 recurved : perianth short-pedicellate, the segments exserted, nearly 

 equal, obcordately lobed : achene narrowly triangular. — A rare or local 

 species, long known only from Hartweg's specimens obtained somewhere 

 in the valley of the Sacramento, but rediscovered by the late Dr. Parry 

 on volcanic rocks near Chieo perhaps the original station. May. 



3. C. Douglasii, Benth. Trans. Linn. Soc. xvii. 418 (1837). Dichoto- 

 mously branching and widely spreading from a short and simple main 

 stem, this bearing one or two whorls of oblong-spatulate leaves which 

 taper to a short winged petiole ; upper leaves reduced to sessile bracts : 

 herbage hoary pxibescent : involucres in small terminal clusters with 

 setaceous bracts, oblong-campanulate, contracted above, sharply angled, 

 transversely corrugated between the angles ; teeth spreading, shorter 

 than the tube, scarious-margined to near the uncinate tips and pinkish : 

 perianth short-pedicellate ; lobes slightly unequal, truncate, the outer 

 cuspidate, the inner shorter and refuse : achenes narrowly winged. — 

 Apparently local in the Santa Cruz Mountains, near Felton and Ben 

 Lomond, in sandy soil. Parry; first collected by Douglas, probably in 

 the same district. A var. albeiis, Parry, 1. c, more pub'escent, and with 

 white flowers, occurs in the valley of the Salinas. 



4. C. robusta, Parry, Proc. Davenp. Acad. v. 176. (1889). Stout, erect, 



