58 PITTONIA. 
G. DIVERGENS. Notably suffrutescent, 2 feet high or more, 
glabrous or merely granular-scaberulous, never truly sca- 
brous, the panicled rather than corymbose branches nearly 
destitute of foliage at flowering time: involueres 1 inch 
high, obovate-turbinate, their obovate obtuse bracts well 
imbricated and with blunt green tips: disk-flowers 5 to 7, 
those of the ray about 5: pales of the pappus 9 to 12, very 
unequal, all narrow and acute, the more numerous short 
ones sometimes conjoined at base with the longer ones, so 
that these appear trifid, i. e, as having short lateral seg- 
ments. 
This is the most common species of the genus in southern 
California, and is excellently represented by Mr. Parish’s 
specimens distributed from the San Bernardino mesas; and 
also, under no 2241, from near Fall Brook, San Diego 
County. Ina more slender and less glabrous form, with 
smaller involucres and comparatively narrow bracts, it occurs 
in the herbaria from Mission Valley, San Diego, collected 
by Mr. Orcutt. In the Botany of the Californian State Sur- 
vey Dr. Gray guessed the plant to be Lagasca’s G. lineari- 
folia; and in the Synoptical Flora he erred about as widely 
in referring it to G. Californica, a species everywhere marked 
by its few and very large heads, these variously scattered or 
glomerate. In the present species they are panicled as in 
no other North American Gutierrezia. 
Some WESTERN SPECIES OF XANTHIUM. 
Having long desired to attempt a segregation of our Amer- 
ican species of this genus, I have thus far been deterred by 
the seeming impossibility of identifying the older species. 
Even those of the Old World are wretchedly confused by Lin- 
nus; both his X. strumarium and X. orientale are aggre- 
gates, and several plants from both hemispheres are included 
by him in each. X. orientale, in spite of its name, has a 
