400 Astereae 



1. H. squarrosa (H. & A.) Greene. Suffrutescent, erect r 

 6-10 dm. high, glandular and glutinous; leaves oblong, about 2 

 cm. long, spinulose-dentate ; heads many, spicately thyrsoid 

 toward the summit of the branches, 1 cm. long; bracts of the 

 involucre rigid, appressed, in many series, their tips abruptly 

 spreading ; rays none ; achenes sparsely pubescent. (Aplopappus 

 squarrosus H. & A.) 



Occasional on dry hillsides throughout our range. November. 



13. LESSINGIA Cham. 



More or less floccose-woolly and sometimes glandular 

 annuals, with alternate more or less serrate leaves, and 

 small cymosely panicled heads. Flowers yellow or often 

 whitish or purplish, all perfect. Corollas with slender 

 tube and long narrow lobes, the outer ones more deeply 

 cleft on one side and imitating a palmatifid ligule. In- 

 volucre campanulate or turbinate, its bracts much imbri- 

 cated, appressed, herbaceous tipped. Anthers with 

 slender subulate appendages. Style-appendages obtuse 

 or truncate, densely hispid, often with a setiform cusp 

 among the hairs. Achenes turbinate or cuneiform, 

 silky-villous. Pappus-bristles rigid, scabrous, red or 

 brownish. 



1. L. glandulifera Gray. Stems diffusely branched from a 

 short erect stem, 1.5-2.5 dm. long, glabrous or glabrate above; 

 basal leaves oblanceolate, pinnatifid, the lower stem leaves 

 spinulose-dentate, those of the branches 5 mm. long or less, thick 

 and rigid, ovate-lanceolate or oblong, the margins commonly 

 beset with yellowish tack-shaped glands ; involucre campanulate 

 or turbinate, its bracts appressed, some or all glanduliferous ; 

 flowers yellow. 



Common on the dry interior plains of our region. June-September. 



14. CORETHROGYNE DC. 



Perennial herbs covered with a white woolly tomentum 

 at least when young. Inflorescence glandular. Leaves 

 alternate entire or serrate, heads middle-sized, solitary, 



