70 ERYTHEA. 



16. P. apargioides. Aplopappus apargioides, Gray, 

 Proo. Am. Acad. vii. 354 (1868). Aster apargioides^ O. 

 Ktze. 1. c. 317 (1891).— Of the eastern Sierra Nevada and 

 parts adjacent. 



17. P. Howellii, Aplopappus Howellii^ Gray, Syn. FL 

 Supplem. 446 (1886). This the author compares with P. 

 uniflora^ though without expressing any opinion that the 

 two are closely allied. They are not at all alike in habit; for 

 P. uniflora has a tap root and no caudex, P. Howellii has a 

 branching caudex much like that of many western cespitose 

 species of Erigeronj on which account its admission into 

 Pyrrocoma somewhat modifies the generic character in a 

 way that is not very satisfactory. 



* * Stems equably leafy to the summit, 



18. P. FOLIOSA, Gray, Journ. Bost. Soc, Nat. Hist. 5 (1843). 

 Aplopappus Fremoniiy Gray, Proc, Philad, Acad. 65 (1863). 

 Aster Wardii, O. Ktze. I. c. — Nearly local along the upper 

 Arkansas River, in Colorado. Perhaps not of this genus; 

 the stems clustered; radical leaves none. 



In Soath American asteraceous plants an intensely 

 reddish or brownish pappus is very prevalent; but the 

 Chilian species, referred to Pyrrocoma by Philippi and 

 others, are certainly not of this genus. They are mostly 

 shrubs, and they make a near approach, to say the least, to 

 our genus Hazardia, 



In his very important contribution to the knowledge of 

 West American Compositse, which we must here cite so 

 ofteu, Nuttall placed his proposed new genus Stenotus next 

 after Homopappusj but these two groups of plants are 

 widely separated from each other in mode of growth. The 

 typical Stenotus species are all woody-cespitose plants, with 

 foliage coriaceous and evergreen. They are really evergreen 

 nndershrubs, rather than herbaceous plants. In this one 

 respect they come nearer to the true Hoorehekia {Aplopap- 

 pus) of South America than do any other North American 



