122 
slender, 1-3° high ; leaves ternately decompound with incisely pinnatifid or 
trifid leaflets, the segments oblong or subcuneate, incised ; cauline leaves 
usually 1-2, with a short sheathing petiole ; leaflets of the involucels linear- 
subulate or setaceous ; petals white or sometimes pinkish ; fruit broadly ovate, 
subdidymous, with slightly prominent ribs. — Coast range of Northern Cali- 
fornia. Found in the Clover Mountains, Nevada ; 9,000 feet altitude ; 
September. (445.) 
OsMOKHizA NUDA, Torr. Pac. R. R. Surv., 4. 93. Petioles and lower 
part of the stem strigosely pubescent j leaflets broadly ovate, often deeply 
3-lobed, coarsely dentate-serrate ; peduncles elongated ; involucre and involu- 
cels none ; umbel 4-rayed, rays 4-6-flowered ; styles very short ; fruit obtuse, 
shorter than the pedicels. — In these specimens, however, as in those from 
California, involucres and involucels are occasionally present, though small ; 
the pedicels are frequently shorter than the fruit ; and the stems, peduncles 
and leaves are often nearly or quite glabrous. On the other hand, O. brevi- 
stylis of the Eastern States is sometimes seen with its umbels fully as naked. 
California ; Alaska. Frequent in the Wahsatch and Uinta Mountains ; 5-9,000 
feet altitude ; May- August. (446.) 
Myrrhis^ OCCIDENT alts, Bcuth. & Hook. {Glycosma^ Nutt.) Some- 
what puberulent or pubescent ; stems 2-4° high, branching ; leaves long- 
petioled, the cauline sessile, biternate or bipinnate, segment oblong or ovate- 
lanceolate, incisely serrate ; umbels of 8-12 slender rays ; fruit dark-green 
or black, 6-8" long, glabrous, with very short styles, the ribs acute but mar- 
ginless. — California and Oregon. Found in the Havallah range and East 
and West Humboldt Mountains, Nevada, and in the Wahsatch; 6-7,000 feet 
altitude ; June- August. Some of the specimens might perhaps be referred 
or less laterally compressed, often constricted at the broad commissure ; carpels subterete or dorsally 
compressed, ^vith the 5-ribs equal, often slender, distant ; vittfe numerous, conspicuous or very delicate, 
rarely aijproximate under the ribs or subsolitary. Carpophore bifid or 2-parted. Seeds subterete or dor- 
sally compressed, nearly flat on the face, often free from the loose pericarp.— Usually perennial and 
glabrous, or the flowt rs ami fruit a little hairy, with mostly ternately or pinnately decompound leaves 
and compound umbels. Involucre and involucels usually none or of a few small leaflets. Benth. «Sz; 
Hook. 
• MYRRHIS, Scop. Calyx-teeth minute or obsolete. Petals cuneate-obovate or^oblong, inflexed 
and quasi-emarginate or 2-lobed. Stylopodia thick, cushioned or short-conical, subentire. Fruit elon- 
gated, shortly beukvd, somewhat compressed laterally, with abroad commissure ; carpels very convex on 
the back ; ribs equal, rather thick, elevated or margined, smooth or roughened ; vittje solitary in the in- 
tervals, very minute. Carpophore bifid. Seeds subcompressed dorsally, slightly concave or deeply 
8ulcate on the face. — Perennial, pubescent or villous, with biternate or i)innately decompound leaves and 
dentate leaflets ; umbels compound, without involucre and involucels (in American species ;) flowers 
white. Benth. & Hook. 
