(h///us^ \-<w. ftxniculaceus Gray, Am. jour. Sci. 2. xxxiii. 
C. anisatiis Gray, Proc. Acad. Philad. 1808, 08. 
Mountains, from Colorado and Utah to N. W. Wyoming and Oregon. 
FI. June to August This is Hall tf- Harbour 22. ^ ^ 
' 18. CYMOPTERUS Raf. Journ. Phys. 1819, 100.— Mostly 
low and glabrous perennials (often cespitose) from a thick elong- 
ated root, with more or less pinnately compound leaves, mostly no 
involucre and prominent involucols, and white, purple, or yellow 
flowers. 
This genus has hei’etofore seemed polymorphous and perplexing on 
account of having been made to contain species which held no relation to 
it. As restricted here, it is quite deftnite and distinct, being easily recog- 
nized by the broad thin wings of the fruit, which is not at all doi sally 
flattened, the concave seed-face (often enclosing a central cavity), and the 
entire absence of strengthening cells. At the same time, the fruit charac- 
ters are so diverse as to make the species easy of distinction. The genus 
is confinod to Western North America, and especially the Great Basin, 
* Seed-face slightly concave. 
t Flozvers white. 
# 
t Involucre none. 
T 
• — Oil-tubes numerous. 
1 . C. glomeratus Raf. 1 . c. Low (8 to 8 inches), with a 
short caudex hearing leaves and peduncles, glabrous: leaves pin- 
nate to bipinnatc: ultimate segments linear-oblong, entire or 
toothed: rays and pedicels very short, making a rather compact 
cluster; involucel of a single palmately 5 to v-parted bractlet: fruit 
o-lohose, 8 to 4 lines in diameter, v/ith 8 to 5 broad thin wings on 
each carpel: oil-tubes small, 4 or 5 in the intervals (or double the 
number where a rib has been suppressed), 8 on the commissural 
side: seed-face almost plane. (Fig. 77. 
'"From Colorado to British Columbia, east to Saskatchewan, Wisconsin 
(Lapham), Iowa {Bessep), and Arkansas iXuftall). 
2. C. campestris Torr. & Gray, FI. i. ()24. Low (2 to 8 
inches high), with short caudex from a tuberous root: leaves bipin- 
nate, with oblong segments: peduncle scarcely as long as leaves; 
umbels 8 to 4-rayed, with involucels of minute bractlets: fruit with 
somewhat thickened wings, the dorsal or both intermediate ones 
