l j) 0~] Hall. Compositae of Southern California. 105 



forks or at the ends of the branches, or some clustered. Recep- 

 tacle globose. Bracts of the pistillate flowers clothed with soft 

 wool, crowded on the low receptacle; each bract sac-like, half- 

 obovate in side view, hooded and rounded t the top with the 

 apex introrse (turned downward and inward) and beaked by a 

 hyaline appendage or scale. Pistillate fertile flowers with fili- 

 form corolla. Hermaphrodite-sterile flowers few, occupying the 

 center of the head, destitute of enclosing or other bracts. Achenes 

 straight or slightly curved. Pappus none. 



The following disposition of our species is only tentative. 

 Further studies in the field, a comparison with the types, and a 

 knowledge of the Chilean forms, will be necessary before a final 

 revision can be made. 



Herbage loosely lanate: heads not numerous ]. P. globiferus. 



Herbage canescent with appressed wool: heads numerous 2. P. tenellus. 



1. P. globiferus (Bert.) Nutt, Trans. Am. Philos. Soc. ser. 2. 

 vii. 340 (1841). Micropus globiferus Bert., in DC., Prodr. v. 

 460 (1836) ? Bezanilla Chilensis Rerny, in Gay, FL Chil. iv. 110, 

 phanerog. t. 46 (1849) ? 



Plant simple-stemmed and erect, or freely branched and the 

 branches prostrate or ascending: herbage loosely lanate: leaves 

 broadly linear, those involucrate to the heads oblong, 3 cm. or 

 less long, obtuse : heads mostly terminal, rendered inconspicuous 

 by the whorled upper leaves: achenes elliptic-oblong. 



Heavy soil on mesas near San Diego, Abrams, no. 3453, and 

 Brandegee (collection of 1903, not the plant distributed as P. 

 globiferus by Baker under no. 1649, which is Stylocline gna- 

 phalioides, correctly determined by Brandegee) ; Bear Valley, 

 San Bernardino Mts., Parish, no. 3723 ; common in the vicinity 

 of Los Angeles, ace. to Abrams. 



2. P. tenellus Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 341 

 (1841). 



Usually depressed, the forking stems prostrate or ascending 

 and often forming a dense mat 1 to 3 dm. broad : herbage canes- 

 cent with a fine and closely appressed wool; leaves numerous, 

 spatulate or linear, mucronate, .5 to 1.5 cm. long: heads in all 

 the upper leaf-axils, about 4 mm. wide : achenes oblong or slightly 

 broadened upward. 



