212 University of California Publications in Botany. [VOL. 3 



tended. The same form comes from San Diego, Palmer, no. 191 ; 

 from Reche Canon, near San Bernardino, Parish (who thinks 

 it a waif at this station) ; and from Laurel Canon, near Los 

 Angeles, May 12, 1901, Braunton. The only difference I am able 

 to detect between this form and certain European specimens 

 of typical A. Mille folium is the slightly more obvious subspinu- 

 lose tips of the leaf -segments. It is apparently the common east 

 American and European form introduced at a few isolated sta- 

 tions in Southern California and slightly modified by its new 

 environment. Specimens recently distributed from the seaboard 

 of middle California (Heller, no. 6740, etc.) under the name of A. 

 Californica, do not belong to this form. 



Var. lanulosa (Nutt.) Piper, Fl. Palouse Reg. 198 (1901). 

 A. lanulosa Nutt., Journ. Phila. Acad. vii. 36 (1834). Herbage 

 lanate-pubescent : leaves finely dissected, the segments closely 

 approximate : achenes rather broadly margined. Very common 

 in the pine belt of all our mountains (San Jacinto Mts., Hall, no. 

 2507, etc.) ; also near the coast and on the islands, ranging far 

 north and east of our district. Almost certainly a native in 

 Southern California. 



85. MATRICARIA L. 



Ours glabrous annuals with alternate leaves pinnately dis- 

 sected into narrowly linear segments. Heads solitary or some- 

 what cymose, with many greenish-yellow or white flowers. Re- 

 ceptacle mostly slender-conical, naked. Bracts of the involucre 

 imbricated in few series, the outer ones a little shorter than the 

 inner, persistent, scarious-margined. Corollas tubular and wiMi- 

 out limb in our species. Pappus reduced to a coroniform border, 

 or none. Achenes glabrous, irregularly nerved. 



Heads 5 to 8 mm. high: achenes with an obscure margin at summit 



1. M. matricarioides. 



Heads mostly 8 to 14 mm. high: achenes with a broad irregularly lobed 



crown 2. M. occidentalis. 



1. M. matricarioides (Less.) Porter, Mem. Torr. Club v. 341 

 (1894). Artemisia matricarioides Less., Linnaea vi. 210 (1831). 

 Matricaria fr'scoidea DC., Prodr. vi. 50 (1837). 



