VOL. VII, PP. 65-so MAY, 1892 



PROCEEDINGS 



OF THK 



BIOLOGICAL SOCIETY OF WASHINGTON. 



DESCRIPTIONS OF NEW PLANTS FROM SOUTHERN 

 CALIFORNIA, NEVADA, UTAH, AND ARIZONA. 



BY FREDERICK VERNON COVILLE.* 



In January, 1891, an expedition was sent out by the United 

 States Department of Agriculture to make a biological survey of 

 Death Valley, in southeastern California, and the adjacent regions. 

 As several months must elapse before the report on the botany 

 of the expedition can be presented to the public, the following 

 descriptions of new plants are now published with the consent 

 of the department authorities. 



Aplopappus interior sp. nov. 



Related to A. linearifolius DC., but differing in its shorter leaves 

 (12 to 20 mm.), subulate-bracteate peduncles, shorter acute in- 

 volucral bracts, and smaller rays 9 to 11 mm. long. In A. 

 I.IiH'drifnlius the larger leaves are 30 to 40 mm. long, the peduncles 

 leafy-bracted, the involucral bracts 11 to 14 mm. long, includ- 

 ing the filiform-subulate acumi nation, and the rays 13 to 15 mm. 

 long. 



Type specimen in the United States National Herbarium, No. 

 794, Death Valley 'Expedition ; collected May 20, 1891, about 

 four miles southeast from Mill Canon divide, at the northern 



* Presented at a meeting of the Biological Society of Washington, April 

 10, 1892. 



JOC., WASH., Yoi,. VII, 18!)2. ((if)) 



