1919] Hall-Goodspeed : Ruhher i)i West American Shrubs 273 



Haplopappus arborescens (Gray)- 

 Althoiigh this is one of the largest species of the genus it is not 

 really arborescent, as its specific name would seem to indicate. How- 

 ever, the woody stems are often several inches thick at the base and 

 the shrubs are commonly three to five feet high. The species is com- 

 mon in the Coast Ranges of middle California and occurs also in the 

 foothills of the Sierra Nevada. Two specimens (151, 152), both from 

 one station on ]\It. Tamalpais, showed only traces of rubber on micro- 

 scopical examination. 



Haplopappus brachylepis (Crray)^' 

 The geographic distribution of H. hrachylepiji is restricted to a 

 small area in southwestern San Diego County, California, and to 

 northern Lower California. The species is a large shrub, commonly 

 three to six feet high, with brittle stems. It grows in the arid chapar- 

 ral belt, usually on stony hillsides. Four samples taken in San Diego 

 Countj^ near the borders of Lower California, were examined with 

 results as indicated below. 



Table 7 — Chemical Analyses 



Haplopappus linearifolius DC. 



This is an erect shrub two to live feet high, with stems commonly 

 one to four inches thick, and resinous herbage. It grows from Lake 

 County, in the Coast ranges, south into Lower California and east 

 to southern Utah and Arizona. It is perhaps most plentiful around 

 the borders of Antelope Valley, California. There are two forms. 

 Typical linearifolius grows in the Coast ranges. The other form, 

 distinguished by its shorter leaves and smaller heads, replaces it in 

 the desert country and is known as var. inferior (Coville) M. E. Jones. 



- Ha i>h>i)(i Pints arborescens (Gray) H. M. Hall, comb. iiov. Jyi'/fo.sv/'w arhor- 

 iHccns Gray, Bot. Mex. Bound. (1859), p. 79. 



'^Haplopappus hrachiilepis (Gray) H. M. Hall, comb. uov. Bigelovia brachy- 

 lepis Gray, Bot. Calif., vol. 1 (1876), p. 614. 



