CHICORIACEOUS COMPOSITE. 41 



STUDIES IN THE BOTANY OF CALIFORNIA AND PARTS 



ADJACENT. 



BY EDWARD LEE GREENE. 



IV. 



i. On Some Chicoriaceous Compositce. 



The type of the genus Mlcroseris, Don, is a South Ameri- 

 can plant, and we have no North American species which 

 agree with it in both habit and pappus. It has ten awn- 

 tipped pale^e; the Oalifornian species which seem truly con- 

 generic with it. have live only. These species of the northern 

 hemisphere are about seven or eight in number, and agree 

 in aspect perfectly with their type. The}- are acaulescent 

 annuals, with rosulate-depressed leaves, slender scapes, 

 which are always decumbent at base, never at all thickened 

 above, supporting heads which are uniformly nodding, both 

 before and after flowering, becoming for the second time 

 erect at the maturity of the fruit. 



The name Calais^ DC. appears to be but in j^art s^^nony- 

 mous with Mlcroseris. DeCandolle himself thought it might 

 eventually be shown that he had included under Calais the 

 types of two genera; and I am persuaded fully that his 

 § Calocalais is a real genus, distinct from Mlcroseris. The 

 species are few. Their palese are five, but the awn rises 

 from an apical notch. These plants are never really acau- 

 lescent. Their leaves are ascending, or erect, on the short 

 or long stems. The peduncles are stout, strictly erect, 

 thicker above, and the heads are firmly erect at all stages of 

 growth. Of this peculiar aspect and character there are 

 about five species, four of which have already their suitable 

 names under Calais. 



4— Bull. Cal. Acad. Sci. II. .5. Issued March 6, 1886, 



