POLYGONACEAE. 105 



spatulate, 2.5 cm. long or less, not tomentose, bracts mostly small; 

 involucres 2-3 mm. long, the alternate teeth strongly divergent, 

 about equaling the tube, uncinate; flowers sessile, 2.5 mm. long, 

 glabrous or somewhat villous, segments equal, narrowly oblong, 

 obtuse, entire; stamens inserted at the base. 



Frequent in the San Gabriel Mountains, Davidson. 



6. C. femandina Wats. Procumbent, rather stout, strongly 

 silky-pubescent, 6-10 cm. long; leaves narrowly oblanceolate, not 

 tomentose; lower bracts foliaceous, the upper narrowly linear; tube 

 of involucre 2 mm. long, the teeth stout, with straight awns; flowers 

 white, 2 mm, long; lobes nearly equal, broadly oblong, the alternate 

 ones slightly narrower. 



First collected in San Fernando Canyon. Otherwise only known 

 from Chatsworth Park. 



7. C. parryi Wats. Branching from the base, 5-8 cm. high, 

 villous-pubescent; leaves narrowly oblanceolate, 2.5 cm. long, 

 not tomentose; lower bracts as large, similar, pungent; tube of 

 the involucre 2 mm. long, the alternate teeth strongly divergent, 

 as long or longer; flowers nearly sessile, white or pinkish, 3 mm. 

 long, villous on the nerves, cleft nearly to the middle; segments 

 recurved, somewhat undulate, oblong-ovate, acutish, crenate, the 

 inner ones about the same length, but narrower; stamens inserted 

 at the base. 



Scarcely reaching our eastern borders, but rather_ frequent on 

 dry plains and foothills in San Bernardino and Riverside Counties. 



5. ACANTHOCYPHUS Small. 



Slender nearly glabrous acaulescent annual herbs, 

 with erect wiry forking scapes. Leaves basal, firm, den- 

 ticulate with spinulose teeth, dilated at the base. Bracts 

 scale-like, ternate, united at the bases, inclined to one 

 side of the axes. Involucres turbinate, truncate, on 

 wire-like peduncles, with 18-20 hard ribs, which are 

 prolonged into as many rigid acicular awns, these sur- 

 passing the tube in length. Flowers 5-14, of 2 kinds: 

 staminate, included; pistillate, exserted. Pedicels sub- 

 tended by linear or linear-spatulate bractlets. Perianth 

 glabrous, segments 6. Stamens 9, inserted at the base 

 of the perianth. 



1. A. parishii (Parry) Small. Slender, 2-5 dm. high; stems 

 with short-stalked glands at the base and for a short distance above 

 the forks, otherwise glabrous and more or less glaucous; leaves 

 3-4 cm. long, finely spinulose-denticulate, tube of involucre 2 mm. 

 long, much surpassed by its slender whitish bristles. {Oxytheca 

 parishii Parry.) 



Common in the pine belt of the San Gabriel and San Bernardino 

 Mountains. 



