12 POLYGONACEAE 



23. Chorizanthe Douglasii Benth. 

 Douglas' Chorizanthe or Spine-flower. Fig. 1327. 



Chorizanthe Douglasii Benth. Trans. Linn. Soc. 17: 418. 1836. 

 Chorizanthe Nortonii Greene, Pittonia 2: 164. 1891. 



Stems erect, usually simple below and dichotomously branched above, 10-30 cm. high, villous- 

 tomentose. Leaves basal, 2-5 cm. long, short-villous with ascending hairs, petioles about as long 

 as the blades ; bracts foliaceous, similar to the leaves but shorter-petioled, the lowest verticillate, 

 the upper opposite, the floral ones narrowly acicular ; cymes reddish purple, head-like, terminating 

 the dichotomous branches ; involucral tube 3 mm. long, hirsute, 6-toothed, the teeth shorter than 

 the tube, spreading, delicately uncinate, broadly membranous-margined to the summit, the mem- 

 branes purplish and continuous through the sinuses; calyx 3.5 mm. high, outer lobes obovate to 

 oblong, truncate or retuse, denticulate and apiculate at apex, the inner a little shorter and emargi- 

 nate; stamens 9. 



Gravelly or sandy slopes, Upper Sonoran Zone; southern Coast Ranges from San Benito and Monterey 

 Counties to San Luis Obispo County, California. Type locality: California. April-June. 



24. Chorizanthe membranacea Benth. 

 Pink Chorizanthe or Spine-flower. Fig. 1328. 



Chorizanthe membranacea Benth. Trans. Linn. Soc. 17: 419. pi. 17. f. 11. 1836. 

 Eriogonella membranacea Goodman, Ann. Mo. Bot. Gard. 21: 91. 1934. 



Stems erect, simple below and with few ascending branches above, 10-40 cm. high, floccose- 

 tomentose. Leaves basal and scattered alternately on the first internode, linear or linear-oblance- 

 olate, 3-6 cm. long, loosely tomentose below, scantily arachnoid above ; bracts foliaceous, verticil- 

 late or opposite, similar to the leaves but shorter, cuspidate; involucres in head-like clusters 

 terminating the branches, tomentose, 4-5 mm. long, the tube 3-angled, contracted in the middle, 

 the teeth slender, nearly equal, uncinate, united to near the apex by a broad, pale rose-colored 

 membranous margin ; calyx tomentose, deeply parted, the lobes obovate, the inner narrower. 



Dry rocky slopes, Upper Sonoran Zone; Mendocino and Trinity Counties to Santa Barbara County in the 

 Coast Ranges, and Kern County in the Sierra Nevada, California. Type locality: California (Douglas). 

 April-July. 



25. Chorizanthe spinosa S. Wats. 

 Spiny Chorizanthe or Mojave Spiny-herb. Fig. 1329. 



Chorizanthe spinosa S. Wats. Bot. Calif. 2: 281. 1880. 

 Eriogonella spinosa Goodman, Ann. Mo. Bot. Gard. 21: 91. 1934. 



Stems prostrate, loosely branched from the base, 5-25 cm. long. Leaves basal, 2-3 cm. long, 

 the blades oblong to broadly obovate, shorter than the petioles, densely woolly-tomentose beneath, 

 villous above and on the petioles ; bracts in whorls of 3, slightly connate at base, lanceolate, 

 spine-tipped and rigid, the floral subulate-acicular ; involucres in small axillary clusters, 3-4 mm. 

 long, canescent, 4-5-toothed, the teeth with straight spine tips, very unequal with one much 

 longer than the others; calyx white, well exserted, the lobes spreading, the 3 outer ones nearly 

 orbicular, entire, the 3 inner much smaller ; stamens 9. 



Dry sandy or gravelly soils, Lower Sonoran Zone; western part of Mojave Desert, from Mojave to Red Rock, 

 Kramer and Rabbit Springs, California. Type locality: "near San Bernardino," California. April-July. 



26. Chorizanthe Orcuttiana Parry. 

 Orcutt's Chorizanthe or Spine-flower. Fig. 1330. 



Chorizanthe Orcuttiana Parry, Proc. Davenp. Acad. 4: 54. 1884. 



Branched from the base and prostrate, the branches 3-7 cm. long, villous-pubescent with 

 appressed or somewhat spreading hairs. Leaves basal, 1-4 cm. long, narrowly oblanceolate, the 

 petiole as long or longer than the blade, villous-tomentose ; lower bracts opposite, foliaceous, 

 oblanceolate, the upper reduced and acicular ; involucres generally solitary in the axils of the 

 cymes ; the tube about 2 mm. long, 3-angled, 3-toothed, the teeth nearly as long as the tube, re- 

 curved, uncinate; calyx cylindric, 2-2.5 mm. long, the lobes erect, linear-lanceolate, short-villous; 

 stamens 9. 



A unique and restricted species, known only from Point Loma and Kearney Mesa, San Diego County, Cali- 

 fornia. Type locality: Point Loma, California. March-May. 



27. Chorizanthe polygonoides Torr. & Gray. 

 Knotweed Chorizanthe or Spine-flower. Fig. 1331. 



Chorizanthe polygonoides Torr. & Gray, Proc. Amer. Acad. 8: 197. 1870. 

 Acanthogonum polygonoides Goodman, Ann. Mo. Bot. Gard. 21: 91. 1934. 



Stems prostrate, dichotomously branched from the base, 5-15 cm. long, sparsely villous- 

 tomentose. Leaves basal, oblanceolate, sparsely hirsute, 3-5 cm. long, the petioles much longer 

 than the blades ; bracts opposite, the lower simulating the basal leaves, mostly spatulate, the upper 

 becoming smaller and shorter-petioled, floral ones acicular ; involucres in small clusters or soli- 

 tary in the axils, the tube 2.5 mm. long, obpyramidal, sharply 3-angled, transversely wrinkled, 

 3 outer teeth as long as the tube, divergent, uncinate, the sides closely folded together, the inner 

 minute ; calyx-lobes erect, only the tips exserted ; stamens 9 ; cotyledons orbicular, accumbent. 



Dry sandy or gravelly soils, infrequent but of wide distribution, Sonoran Zones; Modoc and Lake Counties 

 to San Diego County, California. Type locality: Reservoir Hill, Placerville, California. April-July. 



