54 CALIFOENIA ACADEMY OF SCIENCES. 



meria, supplemented by the single exterior bristle of Mala- 

 cothrix. Geographical range somewhat limited north and 

 south, but extending from central California to Utah. 



P. NUTANS. — ScorzoiieUa, Geyer in Hook. Lond. Journ. vi. 

 523; Ptilophora, Gray, PI. Fendl. 112; Calak, Gray, Pac. R. 

 Kep. iv. 112; Stephanomeria intermedia, Kellogg, Proc. Cal. 

 Acad. V. 39; Microseris nutans, Gray, 1. c. excl. var. major, 



British Columbia and Montana to the high Sierras of 

 northern and middle California. 



P. MAJOR. — Ptilophora, Gray, PL Fendl. 1. c; Calais^ 

 Gray, Pac. E. Rep. 1. c; Microseris major. Gray, 1. c. excl. 

 var. laciniata. Utah and Idaho. 



P. GRACILILOBA. — Calais graciloha, Kellogg, Proc. Cal. 

 Acad. 1. c; Microseris major, var. laciniata. Gray, l..c. 



Still known only from Mendocino County, California; the 

 specimens too young, yet by their pubescence and other 

 characteristics, clearly enough representing a distinct spe- 

 cies. 



NOTHOCALAIS. 



Involucre oblong-campanulate; bracts in two series, nar- 

 rowly lanceolate, membranaceous, with thinner, somewhat 

 hyaline margins, nearly equal, none calyculate. Recepta- 

 cle fiat, alveolate. Akenes fusiform, contracted or rostrate- 

 attenuate at summit, 10-striate-ribbed. Pappus very white and 

 soft, of 10 — 30, scabrous-margined, narrow, unequal palese, 

 with or without some capillary bristles. — Microseris § Notho- 

 Calais, Gray, S\ n. PL ii. 420, with Troximon cuspidatum, 

 Pursh, added. Perennials with linear-attenuate, undulate 

 or crisped radical leaves marked by white-tomentulose mar- 

 gins, and monocephalous, scapose peduncles. Habitat from 

 Northern California to British Columbia and eastward to the 

 Great Lakes, on dry, open rocky places. 



N. SuKSDORFii. — Akene slender, 5 lines long, rostrate-at- 



