Tarweed Tribe 423 



intermediate short lanceolate truncate ones. (Hemizonia tenella 

 Gray.) 



Common on dry barren places in our interior valleys and in open places in 

 the chaparral belt. June-August. 



40. HARPAECARPUS Nutt. 



Small slender viscid-glandular sweet-scented annuals 

 with entire narrow mostly alternate leaves, and numer- 

 ous pedicellate small few-flowered heads. Ray-flowers 

 fertile, 4-8, minute. Disk-flowers 1-4. Bracts of the 

 receptacle united and forming a cup which encloses the 

 disk-flowers, receptacle otherwise naked. Achenes slender 

 compressed or obcompressed. Pappus none. 



1. H. exiguus Gray. Slender, 8-15 cm. high, hirsute, glan- 

 dular above, paniculately branched; the small heads on long 

 filiform naked peduncles ; leaves linear, alternate ; involucral 

 bracts 5-8, lunate, almost destitute of free tips, hispid-glandular; 

 cup of receptacle prismatic and very narrow, enclosing a single 

 straight obliquely obovate laterally compressed achene; ray- 

 achenes obovate-lunate, pointed by a small disk. 



Frequent on wooded hillsides in open places. May-August. 



2. H. minimus (Gray) Greene. Stems branching, only about 

 2.5 cm. high; leaves mostly opposite, the lowest oval or oblong, 

 the others linear, about 6 mm. long; achenes of the ray broadly 

 obcompressed, rounded at the summit, beakless. (Hemizonia 

 minima Gray.) 



Wilson's Peak, Davidson. 



41. LAGOPHYLLA Nutt. 



Slender, villous or hirsute, rigid and brittle, panicu- 

 lately branched annuals, with mostly alternate com- 

 monly entire leaves, and many small heads of pale 

 salmon-colored or yellow vespertine flowers, subtended 

 by foliaceous bracts. Bracts of the involucre 5, thin, 

 herbaceous, flat on the back, completely enclosing its 

 obcompressed achene and deciduous with it. Rays 

 cuneate, palmately 3-cleft, their achenes obovate-oblong, 



