Part 1, 1914] CARDUACEAE : HELENIEAE 69 



11. Chaenactis Orcuttiana (Greene) Parish, Erythea 6: 92. 1898. 



Chaenactis tenuifolia Orcuttiana Greene, W. Am. Sci. 3: 157. 1887. 



Chaenactis glabriuscula Orcuttiana H. M. Hall, Univ. Calif. Publ. Bot. 3: 190. 1907. 



Low winter annual; stem 1-3 dm. high, divaricately branched, leafy, floccose when 

 young, decidedly glandular in the inflorescence; leaves 4-6 cm. long, bipinnatifid with very 

 short obtuse divisions, floccose when young; involucre 6 mm. high, 10-12 mm. broad; bracts 

 about 25, linear, slightly floccose and decidedly glandular; corollas yellow, 4-5 mm. long, 

 puberulent, the marginal ones moderately dilated, funnelform; achenes 4 mm. long, sparingly 

 hirsute; squamellae of the disk-flowers about 3 mm. long, lanceolate, acute, those of the mar- 

 ginal flowers shorter and obtuse. 



Type locality: San Diego, California. 



Distribution: Sea beaches, southern California and Lower California. 



12. Chaenactis Nevii A. Gray, Proc. Am. Acad. 19: 30. 1883. 



A low annual; stem 1-2 dm. high, branched, puberulent and decidedly glandular above, 

 scarcely floccose; leaves 5-8 cm. long, nearly glabrous, somewhat fleshy, bipinnatifid with 

 linear divisions; peduncles 2-5 cm. long; involucre 7-8 mm. high, about 1 cm. broad; bracts 

 rather broadly linear, acute, glandular-puberulent ; corollas yellow, decidedly glandular, 4 

 mm. long, those of the margin only slightly enlarged; achenes 4 mm. long; pappus of minute 

 callous squamellae. 



Type locality: Idaho. 

 Distribution: Idaho and Oregon. 



13. Chaenactis carphoclinia A. Gray, in Torr. Bot. Mex. Bound. 



Surv. 94. 1859. 



Chaenactis paleolifera A. Nelson, Bot. Gaz. 47: 434. 1909. 



A slender annual; stem 1-3 dm. high, puberulent, copiously branched; leaves once or 

 twice pinnatifid into filiform divisions, 4r-7 cm. long, puberulent; peduncles 2-6 cm. long; 

 involucre 5-6 mm. high, 5-10 mm. broad; bracts 15-30, narrowly linear, caudate-attenuate, 

 glandular-puberulent and sometimes somewhat hispid; receptacle more or less beset with 

 filiform bristles, as long as the bracts; corollas whitish, 5 mm. long, villosulous, the marginal 

 ones slightly dilated; achenes 4 mm. long, villous; squamellae of the central flowers ovate- 

 lanceolate, at-least half as long as the corollas, those of the marginal flowers small and obtuse. 



Type locality: Fort Yuma. 



Distribution: New Mexico to Nevada, southern California, and Lower California. 



14. Chaenactis attenuata A. Gray, Proc. Am. Acad. 10: 73. 1874. 



Chaenactis carphoclinia attenuata M. E. Jones, Proc. Calif. Acad. II. 5: 699. 1895. 



A slender annual; stem 2-3 dm. high, glabrous, branched above; leaves alternate, 3-4 



cm. long, pinnatifid into narrow, filiform divisions, puberulent or glabrate; peduncles 3-5 cm. 



long, with small bract-like leaves; involucre narrowly turbinate, about 7 mm. high, 5-6 mm. 



broad; bracts 12-18, linear-subulate, caudate and ending in a bristle-tip, puberulent and 



reddish; receptacle somewhat bristly; corollas whitish, 5 mm. long, villosulous, the marginal 



ones scarcely dilated; achenes 4 mm. -long, villous; squamellae all short and obtuse, less than 



1 mm. long. 



Type locality: Ehrenberg, Arizona. 

 Distribution: Arizona and southern California. 



15. Chaenactis stevioides H. & A. Bot. Beech. Voy. 353. 1838. 



Chaenactis floribunda Greene, Pittonia 3: 168. 1897. 



A freely branched annual; stem 1-2 dm., seldom 3 dm. high, floccose when young, glabrate 

 in age, glandular-puberulent above; leaves 5-8 cm. long, once or twice pinnatifid into linear 

 spreading divisions; peduncles 1-5 cm. long, glandular-puberulent; involucre 8-9 mm. high, 

 10-15 mm. broad; bracts linear, obtusish, with faint midrib, glandular-puberulent; corollas 



