1907] Hall. Compositae of Southern California. 153 



fascicled in rather dense small clusters, normally with 5 rays and 

 6 disk-flowers: bracts of the involucre glabrous or glandular- 

 hispidulous, carinate by a thickened midrib, those of the re- 

 ceptacle slightly united: corolla-lobes pubescent: ray-achenes 

 smoothish or transversely rugose, with a very short beak ; disk- 

 achenes with a pappus of 6 to 10 linear paleae some of which 

 are toothed or lacerate at tip. 



On mesas throughout Southern California except on the des- 

 ert, north to San Francisco Bay ; common, especially toward the 

 coast and on the islands. 



Var. ramosissima (Benth.) Gray, Syn. Fl. i. pt. 2, 310 

 (1884). H. ramosissima Benth., Bot. Sulph. 30 (1844). More 

 diffuse : heads less fascicled or all scattered. Same range as the 

 species but less common. 



8. H. tenella (Nutt.) Gray, Proc. Am. Acad. ix. 191 (1874). 

 Osmadenia tenella Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 392 

 (1841). Calycadenia tenella T. & G., Fl. ii. 402 (1843). 



Slender, usually 1.5 to 3 dm. high: herbage sparsely hispid, 

 minutely glandular above: leaves very narrowly linear, acute, 

 mainly alternate, at least the upper ones ciliate with long white 

 hairs : heads subtended by a few bract-like leaves : involucre 5 

 to 7 mm. high : li gules white with a transverse purple blotch 

 across the midde (or pure white and whole herbage pale in albi- 

 noes), both ray and disk becoming reddish in age: ray-achenes 3 

 to 5, rugose and with an evident dorsal nerve: disk-achenes 5. 

 each with a pappus of 4 or 5 scabrous bristles as long as the 

 corolla alternating with as many oblong lacerate-truncate paleae 

 only half as long. 



On dry plains and in sand-washes from Los Angeles to San 

 Bernardino, Temeeula, and San Diego; especially plentiful to- 

 ward the coast. 



9. H. virgata Gray, Bot. Mex. Bound. 100 (1859). Deinandra 

 virgata Greene, Fl. Fr. 425 (1897). 



Stem (3 dm. or more high) commonly branching at the 

 middle into several virgate branches bearing numerous solitary 

 or racemosely disposed heads on short lateral branchlets : herb- 

 age either glabrous or short-hirsute and glandular: branchlets 



