BUCKWHEAT FAMILY 



391 



Involucral tube sulcate, its teeth 5, equal; bracts small 25. C. insignis. 



Involucre with spurs at base. 



Spurs 6, spine-like ; involucral teeth uncinate 26. C. leptoceras. 



Spurs 3, saccate, each about as large as involueral tube ; involueral teeth straight 



27. C. thurberi. 



1. C. membranacea Benth. (Fig. 67a.) Erect, % to iy 2 feet high, mostly 

 simple below, once to thrice dichotomous above, the involucres in solitary 

 capitate clusters along the branches or mostly terminal ; herbage lanate, floccose 

 in age, the upper surface of the leaves glabrate ; leaves linear, sessile, or grad- 

 ually narrowed into a short petiole, y 2 to l 1 /^ inches long; involucres urn- 



a 



Fig. 67. Involucres of CHORIZANTHE. a, C. MEMBRANACEA Benth.; 6, C. 

 NORTONI Greene; c, C. PUNGENS Benth. x 5. 



shaped, iy 2 to 2 lines long, wholly white-scarious between the awned teeth, 

 or some involucres, especially solitary ones in the lower forks, wholly desti- 

 tute of membranous border; awns slender, uncinate, and strongly divergent; 

 flowers 2 or 3, unequally pedicelled, of these 1 or 2 undeveloped or obsolete; 

 calyx woolly, its segments obovate or spatulate, the inner narrower, all clawed, 

 united only at very base ; stamens 9. 



Coast Ranges, mostly towards the interior from Tehama Co. south to the 

 Santa Inez Mts. ; Sierra Nevada, in the foothills and lower part of the Yellow 



Pine belt. May-June. 



Locs. Salt Creek, Tehama Co., Jepson; Scotts Valley, Lake Co., Tracy 1657; Napa Eange, 

 Jepson; Vacaville, Platt; Mt. Diablo, Jepson; Crystal Springs, San Mateo Co., Bolander ; 

 Mt. Day, Santa Clara Co., E. J. Smith; Big Sur Eiver, Davy 7435; San Antonio Trail, Santa 

 Lucia Mts., Jepson 1665; Estrella, Jared; Santa Inez Mts., Dunn; Old Colony Mill, K 

 Brandegee, Jepson 633; Toll House, Fresno Co., Hall fy Chandler 31; Yosemite, E. J. Smith; 

 Bowers Cave to Hazel Green, Jepson; Sheep Eanch, Calaveras Co., Davy 1610. 



Eefs. CHORIZANTHE MEMBRANACEA Benth. Trans. Linn. Soc. 17: 419, t. 17, fig. 11 (1837), 

 type from California, Douglas; Jepson, Fl. W. Mid. Cal. ed. 2, 129 (1911). 



2. C. nortoni Greene. (Fig. 67b.) Mostly 1-stemmed, 2 or 3-forked, or 

 sometimes many-stemmed from base, 4 to 7 inches high, the involucres con- 

 gested in terminal heads; leaves oblanceolate, 1 to 1% inches long; lower 

 bracts foliaceous, the upper reduced; herbage hairy; .involucres reddish, 

 cylindric-urnshaped, 6-ribbed, margined by a broad scarious purple 6-lobed 

 border; lobes unequal, the 3 larger triangular in outline, the 3 alternate often 

 small or obsolete, all ending in a short uncinate awn; some earlier involucres 

 solitary in the forks and these destitute of scarious margin; calyx rose-color, 

 little exserted, its short oblong lobes equal, undulate-erosulate ; stamens 6. 



Mountains bounding the Salinas Valley and westward to the Pacific Ocean. 

 June. Involucres often reticulate between the ribs. 



Locs. Big Sur, Davy 1431; Santa Lucia Creek, Jepson 4732; Burro Trail, Santa Lucia 

 Mts., K. Brandegee; Bitterwater, Eastwood; Estrella, Jared. 



Eef. CHORIZANTHE NORTONI Greene, Pitt. 2: 164 (1891), type loe. Gonzales, A. Norton. 



3. C. stellulata Benth. Stem erect, trichotomously branched, mostly above 

 the base, 4 to 6 inches high, the involucres in cymose clusters or somewhat cap- 

 itate ; herbage hairy ; leaves linear, acute, sessile, 5 to 8 lines long, in a rosette 



