88 
glabrate; leaves mostly radical, numerous^ and of a fleshy texture, 
ovate-oblong, obtuse, often a little cordate at base, strongly cuspidate- 
toothed, i^ inches broad, 3 inches long, on petioles of almost equal 
length; stem i^- feet high, slender, leafless, or with a few large and 
small bracts; corymb lax; heads middle-sized, on slender peduncles; 
involucres with a few almost fiUform calyculate scales or bracts at 
base; rays 9-12, yellow. 
Lynx Creek, in Northern Arizona, May 31st, 1883; collected by 
H. H. RusDy. 
MiCROSERis ACUMINATA. — Near M, Bigelovii^ but larger, the 
scapes more than, a foot high, and rather stout; leaves pinnately 
parted into numerous, narrowly linear division; akenes only slightly 
contracted at summit, \ inch long; pappus f inch long, consisting of 
5 linear-lanceolate scales, each tapering very gradually into a short, 
slender awn. 
Collected, in a few depauperate specimens, near Vallejo, in April 
1883; and also, at about the same date, in the Sacramento Valley, by 
Mrs. Kate Curran, her specimens being of a strong, luxuriant growth. 
Dr. Gray informs me that it was even long ago collected sparingly 
by Bigelovv, on Mark West's Creek, and that it has been referred, 
first to M, Uouglassii and later to M. Bigelovii, 
Troximon heterophyllum, — This will apparently have to be 
the name of the North American plant which has been for some 
years past called T. Chilense^ Gray. (Proc. Am. Acad., ix., 216, and 
Bot. Cal., i., 439.) The Chilian plant, for which Dr. Gray's specific 
name will be retained, differs in having considerably larger akenes, 
which are always all alike in the same head, and a shorter stipe to 
the pappus. 
The North American plant runs into varieties so remarkable that, 
on two of them, so acute and able a botanist as Nuttall founded 
genera; and I even now doubt if they do not merit the rank of 
species. However, since my venerated friend Dr. Gray (who, by 
the way, has lately, and independently of my fresh specimens and 
notes, reached also the conclusion that our species is distinct from 
the Chilian) regards them as mere varieties, I here so place them; 
namely; 
van CRVPTOPLEURA.— Outer akenes nearly globose inflated and 
hardly striate, the inner of normal thickness and also barely striate, 
not at all winged. This is the Cryptophura Californica, Nutt., and 
Macrorhyncus Californicns^ Torr, & Gray. Although hitherto ac- 
counted very rare, and thought to be perhaps a merely abnormal 
state not likely to recur, I have this year found plenty of it in two 
patches a quarter of a mile distant from each other, though both 
within the limits of the town of Berkeley. 
var. KVMAPLEURA. — Outer akenes with broad and strongly and 
beautifully undulated wings, the inner merely striate. This is Kyma- 
pleura heterophylla, Nutt,, and 2\%q Macrorhyntus heterophyllus, of the 
same author. It is the most common form of the species in the 
central part of California. 
Besides these striking varieties, which do not show any signs of 
running together, there are other forms, namely, one with akenes all 
