Hall. Compositae of Southern California. 23 



Pappus none. 



Herbage not white-woolly. 



Flowers yellow: rays present. 



Leaves pinnately parted into linear lobes: low annual 



78. BLENNOSPEBMA, p. 206. 



Leaves denticulate or entire: tall perennial 



60. VENEGASIA, p. 162. 



Flowers white or purplish: rays wanting: leaves pinnately parted.... 



Chaenactis artemisiaefolia, p. 



Herbage white-woolly, at least when young. 



Kay-corollas with a toothed appendage at orifice opposite the 



ligule 66. MONOLOPIA, p. 175. 



Bay-corollas without appendage. 



Bays yellow, persistent, becoming papery.. ..62. BAILEYA, p. 163. 



Bays yellow, deciduous 70. EBIOPHYLLUM, p. 180. 



Bays purple or flesh-colored, deciduous 



Syntrichopappus Lemmoni, p. 177. 



TRIBE 8. ANTHEMIDEAE. MAYWEED TRIBE. 



Mostly strong-scented or aromatic plants. Leaves alternate, 

 all or some of them finely dissected, pinnately parted, or pinnati- 

 fid, except in a few species. Bracts of the involucre imbricated, 

 commonly dry and scarious or with scarious margins. Re- 

 ceptacle naked, or pubescent, or with chaff-like bracts. Flowers 

 white, yellow, or greenish, either all perfect or the outer ones 

 pistillate or neutral. Rays present or none. Anthers not cau- 

 date. Style-branches of pistillate flowers obtuse or truncate, 

 destitute of appendage. Pappus none or a short scarious crown. 

 Beceptacle chaffy: heads radiate. 



Heads solitary: rays 10 to 20 83. ANTHEMIS, p. 210. 



Heads in a terminal cyme: rays 4 to 6 84. ACHILLEA, p. 211. 



Beceptacle naked (except in Artemisia Palmeri) : heads discoid. 

 All of the flowers with corolla. 



Heads solitary terminating leafy branches or peduncles: receptacle 



conical 85. MATBICABIA, p. 212. 



Heads in panicled racemes or spikes: receptacle nearly flat 



88. ABTEMISIA, p. 215. 



Marginal flowers destitute of corolla: receptacle nearly flat. 



Heads peduncled: style deciduous 86. COTULA, p. 213. 



Heads sessile: achenes pointed with the spine-like persistent style... 

 87. SOLIVA, p. 214. 



