1907] Hall. Compositae of Southern California. 277 



to 3 cm. high, its broad outer bracts well imbricated and with 

 rather persistent traces of white wool: ligules shorter than the 

 involucre : achenes 4 or 5 mm. long, tapering into a filiform beak 

 12 to 15 mm. long: pappus usually bright white. 



Talmadge's Mill, in the San Bernardino Mts., at an altitude 

 of 1500 m., Parish, no. 3051 ; Laguna, San Diego Co., Cleveland. 

 no. 435 ; Cuyamaca Mts., San Diego Co., Brandegee; eastern base 

 San Jacinto Mts., Hall; Santa Ana and San Gabriel Mts., ace. 

 to Abrams; Casitas Pass, Ventura Co., Hall, nos. 3205a, 3218; 

 Mono Flat, Santa Barbara Co., Hall, no. 7790; and north. The 

 Southern California specimens usually have leaves with broad 

 and merely acute terminal lobes ; in the region of San Francisco 

 Bay the leaves are much more slender and the terminal lobe is 

 acuminate; my number 3205a is exactly intermediate between 

 these two forms. 



3. T. heterophyllum Greene, Bull. Torr. Club x. 88 (1883). 

 T. Chilense Gray, Proc. Am. Acad. ix. 216 (1874) ; not Macro- 

 rhynchus Chilense Less. 



Scapes slender, .5 to 4 dm. high, from an annual root, often 

 numerous : leaves linear to oblong or spatulate, entire or dentic- 

 ulate to sinuate-pinnatifid, sparingly villous-pubescent or gla- 

 brous : involucral bracts lanceolate-acuminate ; the inner ones 

 glabrous, 1.2 to 1.8 cm. long: ligules inconspicuous (except in 

 var. Calif ornicum) , seldom exceeding the involucre: achenes 4 

 mm. or less long, variable, as indicated below; the outer ones 

 glabrous to villous : pappus whitish, commonly shorter than the 

 beak of the achene. 



SYNOPSIS OF VARIETIES AND FORMS OF T. HETEROPHYLLUM. 

 Ligules inconspicuous, about as long as the involucre. 



Outer achenes with straight ribs f. normale. 



Outer achenes with sinuate ribs f. Jcymapleurum. 



Outer achenes enlarged, not ribbed f. cryptopleurum. 



Ligules conspicuous, much exceeding the involucre. 



Outer achenes with straight ribs var. Calif ornicum f. idiale. 



Outer achenes with sinuate ribs var. Calif ornicum f . crenulatum. 



Outer achenes enlarged, not ribbed var. Calif ornicum f. turgidum. 



f. normale (Piper) Hall, comb. nov. T. heterophyllum Greene, 

 I.e. Agoseris heterophylla Greene, Pitt. ii. 178 (1891). A.heter- 

 ophylla subsp. normalis Piper, Contr. U. S. Nat. Herb. xi. 544 



