September 3' >, lO'i ^3 



ADDITIOXAL SOUTHHRX CALII*( )KXI.\X C >M- 



POSITAE 



Hv II. M. Hai.i. 



A number of species of Compositae not mentioned in my 

 earlier paper (Univ. Calif. Publ. Botany :5: 1-302. 1907) are now- 

 known to occnr in southern California. These are enumerated 

 below, together with a few notes on other species. 



Trichocoronis Wrightii (iray. Dr. H. E. Hasse has 

 collected this Mexican plant in a cienega near Beaumont, Riv- 

 erside county, where it was doubtless introduced. It is very 

 different from all our other species of Enpatorieae, to which 

 tribe it belongs, being a flaccid weed-like herb, with homely 

 dull white or pinkish heads. 



Pentachaeta alsixoides Greene. This species of mid- 

 dle California has been collected by Miss Alice Eastwood at 

 Gaviota, Santa Barbara county. The only other known station 

 south of Santa Clara county is Arroyo Grande, San Luis Obispo 

 county (Miss M. Alice King), but it is to be expected elsewhere 

 in the coast ranges. The dichotouious branching, small di.scoid 

 heads, and only three or four pappus bristles should serve to dis- 

 tinguish it. 



Pentachaeta aurea Nutt. A beautiful color-form has 

 been discovered at El Toro, Orange county, by Mr. Theodore 

 Pavne. The rays are white, except at the very base, which is 

 vellow, fading to rose-purple, the disk yellow, the plants other- 

 wise as in typical P. aurea. In this form, which grew in abund- 

 ance near the station at El Toro, according to Mr. Payne, the 

 plants are 10 to 30 cm. high, sparsely pubescent on stem and 

 leaves, and with very glabrous involucres 7 mm. high. The 

 achenes are denst-K hirsute, rather sharply 5-angled, and with 

 5 pappus bristles. It is much more handsome than typical P. 

 aurea, the 25 to 60 white rays, each 10 mm. long, contrasting 

 splendidly with the yellow disk. The disk corollas are slightly 

 irrefrul.ir in the usual manner. 



