BrcKWHKAT FAJIILV. 151 



Santa Cruz Mountains. The var. diffusa Parry (C. diffusa Benth.) 

 has the cauline leaves all reduced to narrow or very small bracts and 

 the margins of the involucre usually white. 



5. C. pungens Benth. Somewhat slender, villous-pubescent, the 

 branches prostrate or at first erect, 2 to 12 or 15 in. long, sub- 

 dichotomous; leaves spatulate or oblanceolate, J to IJ in. long, oppo- 

 site petiole!^ of the cauline leaves 3 lines long, those of the radical 9 

 lines ov less; bracts linear or subulate acerose; involucres clustered on- 

 short lateral branchlets 2 to 3 lines long, unequally toothed, the 

 alternate shorter; teeth of the involucre scarious margined, strongly 

 uncinate; cidyx narrowed at base, cleft about ^ the way down; seg- 

 ments equal, oblong, erose-denticulate at summit, mucronulate; 

 stamens '.I, unequal, tilaments plainly adnate to the lower part of the 

 tube; styles slender, equaling the stamens. 



Sand hills, San Francisco Peninsula southward to Monterey. C. 

 cuspidata Wats, is plainly a synonym. 



6. C. Cleveland! Parry. Plants prostrate, branched from the 

 base, 4 to 16 in. broad, hairy pubescent; radical leaves ovate-spatulate, 

 eauline leaves nai-rowand pungent; involucre with unequal divergent 

 uncinate teeth; outer calj'x segments shortly cleft, broadly ovate, 

 erose; inner narrow and laciniate; stamens 3. 



Coast Ranges north of San Prancisco Bay, toward the interior: 

 Napa and Lake Cos. 



7. C. uniarrstata T. & G. Stems prostrate, 2 to 6 in. long, with a 

 short soft pubescence; leaves broadly spatulate, the bracts oblanceo- 

 late, cuspidate; involucres numerous but rather loosely cymose on 

 the branches or sometimes densely clustered; involucral teeth not 

 margined but awned; one awn long and straight, the others very 

 short and hooked; ilowers cream-colored; outer segments of the calyx 

 entire, obovate, the inner J as long, oblons; stamens 3. 



Base of Mt. Diablo, June, 1884, M, K. Curran (the inner calyx 

 segments not entire); more common southward: Salinas, Palurer. 



4. OXYTHECA Nutt. 



Slender annuals with the internodes more or less covered with 

 stipitate glands and a repeatedly dichotomous inflorescence. Leaves 

 in a rosette at base. Bracts foliaceous and more or less connate, often 

 in 3's. Involucres few-flowered, more or less distinctly pedicellate, 

 campanulate or turbinate, 3 to 5-cleft, the teeth bearing a bristle or 

 awn, or awnless. Flowers mostly exserted. Calyx segments equal, 

 glandular-pubescent on the outside. Stamens 9. Achene commonly 

 lenticular. (Greek oxus, sharp, and theke, case, in allusion to the 

 spiny involucre.) 



1. O. hirtiflora (Gray) Greene. About 6 in. high, glandular- 

 puberulent; leaves oblong-spatulate, with scabrous ciliate mHrgins 

 and a broad red mid-vein; bracts hispid; involucres awnless, turbinate, 

 i line long, deeply and unequally 4-lobed, on erect or nodding pedi- 

 cels 1 to 3 lines long; flowers 8 to 5, yellowish, tinged with red, | line 

 long; aebenes triangular, exserted. — (Eriogonum hirtiflorum Gray.) 



