MR, GEYER'S ROCKY MOUNTAIN PLANTS. 233 
the petioles, being similarly terete and jointed. On emerg- 
ing above the water, these petioles expand into lamine at 
the top, retaining the jointed swollen character in the costa. 
The radical petioles are 8-10 inches long: those of the 
stem, in proportion as they are out of the water, become 
flattened and the margin spinuloso-ciliate.” The nerves 
of the leaves branch off chiefly from the base or lower 
portion of the costa and run upwards, parallel, or nearly 
so, with the costa, and then are united by lesser reticu- 
lated ones. The stem is 1-2 or more feet high, the upper part 
dichotomously divided, with a solitary pedunculated head 
in the axil, and a pair of spreading, nearly sessile leaves at 
the fork: at the upper forks, deeply divided or laciniated. 
Heads of flowers about the size ofa hasel-nut ; their scales, 
or partial bracteas, purple, trifurcate. 
2. Cicuta virosa, L.—Hook. Fl. Bor. Am. 1. p. 259. Torr. et 
Gr. Am. 1. p. 610. 
Han. Thickets, border of the Upper Clarke River, near 
Flathead Gate, or Porte d'Enfer. (n. 219.) 
l. Edosmia Gairdneri, Torr. et Gr. Am. 1. p. 312. Alenia ; 
Gairdneri, Hook. et Arn. Bot. Beech. Voy. Suppl. p.349 — 
-— montana, præalta et Oregana, Nutt. (sec. Torr. et — 
Has. Grassy mountain slopes and neglected fields, from _ 
Colville to Vancouver. The Nez Percez Indians collect — 
the tuberous roots and boil them like potatos. In rich — — 
Meadows they are the size of one's finger, and are very _ 
agreeable, with a cream-like flavour, (n. 576) — — 
A Angelica? (Thapsium, Gey.) verticillata; Gey. mst. ; foliis 
Tadicalibus longe petiolatis biternatim divisis, petioli sul- 
imis quinatim pinnatis, pinnulis oblongo-ovatis (unc 
Dus et ultra) grosse serratis, umbella subsexradiata, 
medio longiore latioreque fæmineo erecto reli 
S * :  Profunde sulcatis, stylopodiis magnis, : tyl 
