BUCKWHEAT FAMILY 7 



9. Chorizanthe Xantii S. Wats. 

 Xantus' Chorizanthe or Spine-flower. Fig. 1313. 



Chorizanthe Xantii S. Wats. Proc. Amer. Acad. 12: 272. 1877. 



Stems erect, simple below or branching from the base, 5-25 cm. high, with an appressed 

 pubescence, sometimes sparsely so. Leaves basal, 2-5 cm. long, long-petioled, the blades oblong- 

 ovate to oblong-oblanceolate, tomentose beneath, villous above and on the slender petioles ; lower 

 bracts foliaceous, similar to the leaves, the floral ones acicular ; involucres solitary in axils or in 

 small clusters forming a rather flat-topped cyme, the tube 4-4.5 mm. long, narrowly cylindric, 

 canescent, teeth 6, widely divergent, uncinate, 3 outer larger than the inner ones ; calyx 5-6 mm. 

 long, white or rose-colored, outer lobes 2 mm. long, oblong or elliptic, the inner a little shorter 

 and narrower ; stamens 9. 



Dry ridges and flats, mainly Upper Sonoran Zone; southern San Luis Obispo, Kern and Inyo Counties south 

 mostly through the desert regions to Cajon Pass, San Bernardino County, California. Type locality: near Fort 

 Tejon, Kern County, California. April-June. 



Chorizanthe Xantii var. leucotheca Goodman, Ann. Mo. Bot. Gard. 21 : 60. 1934. Plants lower, 5-10 cm. 

 high; involucres densely white-tomentose. Sandy mesas, Lower Sonoran Zone; western Colorado Desert, Kiver- 

 side County, California. 



10. Chorizanthe Wheeled S. Wats. 

 Wheeler's Chorizanthe or Spine-flower. Fig. 1314. 



Chorizanthe Wheeleri S. Wats. Proc. Amer. Acad. 12: 272. 1877. 

 Chorizanthe insularis Hoffmann, Bull. S. Calif. Acad. 31 : 56. 1932. 



Stems simple or branched from the base, erect or spreading, frequently trichotomously 

 branched at first node, 6-20 cm. high, rather densely cinereous-pubescent. Leaves basal, 2-3 cm. 

 long, the blades ovate-spatulate to oblong, hoary-tomentose beneath, abruptly narrowed to a 

 slender elongated petiole ; lower bracts often in a verticil at first node, foliaceous and similar to 

 the leaves, the floral ones acicular and opposite; cymes terminal on the branches, closely con- 

 gested; involucres becoming reddish, cylindric, 2.5-3 mm. long, sparsely tomentose or glabrate, 

 6-toothed, the teeth short, widely spreading, uncinate; calyx 3-3.5 mm. long, the outer lobes 

 oblong-elliptic to lanceolate, obtuse, the inner a little smaller and narrower ; stamens 6. 



Dry gravelly or sandy ridges, Upper Sonoran Zone; along the coast of Santa Barbara and Los Angeles Coun- 

 ties and on Santa Cruz and Santa Rosa Islands, California. Type locality: Santa Barbara, California. April- 

 June. 



11. Chorizanthe Parryi S. Wats. 

 Parry's Chorizanthe or Spine-flower. Fig. 1315. 



Chorizanthe Parryi S. Wats. Proc. Amer. Acad. 12: 271. 1877. 



Plants diffusely branched, decumbent or ascending, 4-30 cm. long, appressed-pubescent. 

 Leaves basal, oblanceolate, 2-7 cm. long, narrowed to the petiole, more or less appressed- 

 pubescent ; lower bracts similar to the leaves but more distinctly mucronate, the floral ones 

 acicular ; involucres in small numerous clusters forming a loose cyme, the tube 6-ribbed, urceolate, 

 3 mm. long, canescent with appressed hairs ; outer teeth widely spreading, about as long as the 

 tube, more or less uncinate, the inner 3 much reduced, uncinate ; calyx-lobes spreading, the outer 

 oblong-obovate to oblong, obtuse, erose, the inner linear-lanceolate. 



Dry sandy plains and washes, Upper and Lower Sonoran Zones; interior valleys of cismontane southern 

 California, Los Angeles and San Bernardino Counties to San Diego County. Type locality: Crofton, San Ber- 

 nardino County, California. April-June. 



Chorizanthe Parryi var. fernandina (S. Wats.) Jepson, Man. Fl. PI. Calif. 298. 1923. {Chorizanthe 

 fernandina S. Wats.) Outer involucral teeth widely divergent but straight not recurved nor uncinate, the inner 

 also straight and very much reduced. Nearer the coast than the typical species and extends from San Fernando 

 Valley and coastal valleys of Los Angeles County to Orange County, California. 



12. Chorizanthe Breweri S. Wats. 

 Brewer's Chorizanthe or Spine-flower. Fig. 1316. 



Chorizanthe Breweri S. Wats. Proc. Amer. Acad. 12: 270. 1877. 



Stems ascending to decumbent, branching from or near the base, 6-15 cm. long, cinereous 

 with a short appressed pubescence. Leaves basal, pubescent with upwardly curved hairs, long- 

 petioled, the blades spatulate to ovate, 6-12 mm. long; lower bracts foliaceous, similar to the 

 leaves, the upper acicular; involucres in small dense rather distinct cymes, cylindric, 3-4 mm. 

 long, short -tomentose and reddish ; teeth spreading, uncinate, the 3 inner shorter than the alter- 

 nating outer ones ; calyx 3-3 . 5 mm. long, partly exserted, outer lobes elliptic to obovate-oblong, 

 the inner broadly ovate, shorter ; stamens 9. 



Dry rocky (mostly serpentine outcrops) hillsides, Upper Sonoran Zone; San Luis Obispo County, from 

 vicinity of Atascadero to San Luis Obispo, California. Type locality: dry rocky hillsides, San Luis Obispo. 

 April-June. 



13. Chorizanthe Palmeri S. Wats. 

 Palmer's Chorizanthe or Spine- flower. Fig. 1317. 



Chorizanthe Palmeri S. Wats. Proc. Amer. Acad. 12: 271. 1877. 



Stems erect, mostly simple at base, dichotomously branched above, 8-20 cm. high, more or less 

 cinereous with a short tomentose pubescence. Leaves basal or nearly so, Z-A cm. long, the blades 

 oblanceolate, narrowed to a petiole of about equal length ; cauline bracts when present verticillate 



