122 BOTANY. 



slender, 1-3° high ; leaves ternately decompound with incisely pinnatifid or 

 trifid leaflets, the segments oblong or subcuneate, incised ; canline leaves 

 usually 1-2, vi^ith 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.) 



OsMOEHizA NUDA, Torr. Pac. R. R. Surv., 4. 93. Petioles and lower 

 part of the stem strigosely pubescent; 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. hrevi- 

 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.) 



Myerhis^ occidentalis, Benth. & 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, witli the 5-ribs equal, often slender, distant ; vittse numerous, conspicuous or very delicate, 

 rarely approximate under the ribs or subsolitary. Carpophore bifid or 2-parted. Seeds subterete or dor- 

 saUy comprei^sed, nearly flat on the face, often free from the loose pericarp. — Usually perennial and 

 glabrous, or the flowers and 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. & 

 Hook. 



' MYERHIS, Scop. Calyx-teeth minute or obsolete. Petals cuneate-obovate orJIoblong, irtflexed 

 and quasi-emarginate or.2-lobed. Stylopodia thick, cushioned or short-conical, subentire. Fruit elon- 

 gated, shortly beaked, somewhat compressed laterally, with abroad commissure ; carpels very convex on 

 the back ; ribs equal, rather thick, elevated or margined, smooth or roughened ; vittss solitary in the in- 

 tervals, very minute. Carpophore bifid. Seeds subcompressed dorsally, slightly concave or deeply 

 sulcate on the face. — Perennial, pubescent or villous, with biternate or pinnately decompound leaves and 

 dentate leaflets ; umbels compound, without involucre and involucels (in American species ;) flowers 

 white. Benth. & Hook. 



