ISOCOMA. 171 
I. LEUCANTHEMIFOLIA. Branches stout, tortuous, leafy with 
large foliage up to the ample compound cyme of Jarge heads, 
scaberulous and viscid: leaves 2 inches long, broadly oblanceo- 
late, obtuse, coarsely and closely serrate-toothed, scaberulous 
above, somewhat villous-arachnoid and viscid beneath: heads 
glomerate in twos and threes at the ends of the branches and 
branchlets of the cyme, large, with broadly subturbinate involu- 
cres many-bracted, the bracts with broad obtuse green and glandi- 
ferous tips: achenes not seen. 
At Warren, in the Mountains of San Diego Co., Calif., 21 
Oct., 1889, C. R. Orcutt. 
I. EREMOPHILA. Branches 14 feet high, stout, glabrous, 
parted in the middle to form a loosely fastigiate panicle of 
cymose corymbs: lower leaves spatulate-oblanceolate, 2 inches 
long, obtuse, remotely subserrate-toothed, glabrous, punctate, 
those of the panicle all reduced, linear, entire: involucres not 
small, turbinate, their bracts glabrous, not viscid, subquadrate- 
oblong, obtuse, only inconspicuously and shortly green-tipped, - 
the tips of the inner with a large low gland on the back. 
Southwestern part of the Colorado Desert, Calif., 1 Nov., 
1890, C. R. Orcutt, n. 2,223 as in U. S. Herb. 
I. OXYPHYLLA. Plant evidently large, the long branches 
striate, loosely villous-hairy, leafy up to the ample compound 
cyme of rather large heads: leaves 1 to 14 inches long, linear- 
lanceolate, entire, very acute, of thin texture, glabrous, light 
green: involucres broadly turbinate, glabrous, not viscid, the 
green herbaceous tips of the bracts large, elliptical: limb of 
corolla remarkably short. 
Jamul Valley, back of San Diego, Calif., Edw. Palmer, 1875, 
the species very strongly marked, and not otherwise known. 
I. microponta. Branches stout, scabrous, densely leafy up 
to the ample cymose panicleof rather large heads: leaves small; 
about ł inch long, spatulate-oblong, entire below the middle, 
subserrate-denticulate near the apex, the whole margin more or 
less scabrous-ciliate, both faces glabrous; branches of the pan- 
icle long and leafy, the leaves little reduced : involucres turbi- 
