262 UMBELLIFER^E. Osmorrhiza. 



sulcate on the face or with margins contiguous and enclosing a central cavity. 

 Carpophore 2-cleft. Perennials, with thick aromatic roots, more or less hirsute ; 

 leaves large, 2-3-ternately compound; involucre small or none; umbels tew, few- 

 rayed and few-fruited; flowers white. 



A genus of half a dozen species. The two species of Eastern America extend to Asia, while 

 the two of California are confined to the western coast. 



1. O. nuda, Torrey. Eather slender, 2 or 3 feet high, more or less pubescent 

 with spreading hairs : leaves twice ternate ; leaflets ovate, an inch or two long, 

 acute or obtusish, rather deeply cleft and toothed : umbel long-peduncled, 3-5- 

 rayed, naked or with small caducous involucre and involucels ; rays 2 or 3 inches 

 long : pedicels 3 to 9 lines long : fruit slender, 6 or 7 lines long and a line broad or 

 less, acutely ribbed ; the style and stylopodium very short ; the attenuated base 2 

 lines long : seed terete, sulcate on the inner face. Pacif. B. Bep. iv. 93. 0. bre- 

 vistylis, Hook. Fl. i. 272 in part, t. 97. 



In the mountains from San Diego Co. to Alaska and eastward to Colorado. It is doubtful if 

 the allied 0. brevistylis extends so far west as the Rocky Mountains. That species is distinguished 

 by its larger and more acuminate leaflets, involucrate umbels, and larger fruit, and the seed more 

 angular and involute. 



2. O. brachypoda, Torrey. About a foot high : leaves 2 - 3-ternate ; leaflets 

 ovate, an inch long or less, acute, laciniately lobed and toothed : rays rather shorter; 

 involucre of one or few and involucels of 4 to 6 linear-acuminate bracts, the latter 

 equalling the flowers ; pedicels very short : fruit strongly and acutely ribbed, 6 

 lines long by 1 1 broad, the stout base but a line long ; stylopodium depressed and 

 styles very short : seed strongly 5-angled, the margins contiguous and closing the 

 deep central sulcus. Pacif. E. Eep. iv. 93. 



A strongly marked species, seemingly confined to Central California ; Nevada Co. (Bigclow, 

 Pratten), Santa Clara Valley (Goodale), and Monterey, Parry. 



15. GLYCOSMA, Nutt. 



Characters as in Osmorrhiza except-as regards the fruit, which is linear but not 

 attenuate to a narrow base, and usually glabrous ; stylopodium depressed and styles 

 very short : seed semiterete or angled, with a rather broad sulcus on the face. In- 

 volucre and involucels wanting. 



A group of plants of Western America, more nearly allied to Osmorrhiza than to Myrrhis of 

 the Old World, to which it is referred by Bentham & Hooker. The species are very much alike. 



1. Gr. occidentale, Nutt. Eather stout, 2 feet high or more, finely puberulent 

 throughout, excepting the inflorescence: leaves 2-ternate, the leaflets oblong-lanceo- 

 late, 1| to 2| inches long, serrate : rays somewhat erect ; pedicels 2 to 4 lines long, 

 exceeding the sterile flowers : fruit 7 or 8 lines long, rather acutely angled. Torr. 

 & Gray, Fl. i. 639 ; Gray, Proc. Am. Acad. viii. 386. Myrrhis occidentalis, Benth. 

 & Hook. Gen. PI. i. 897 ; Gray, Proc. Am. Acad. vii. 346. 



In the mountains from Oregon to Mono Pass, and eastward to the Wahsatch ; S. Utah, Parry. 



2. Gr. ambiguum, Gray. Glabrous, or somewhat hairy near the nodes : leaflets 

 rather smaller and more deeply gash-toothed, an inch or two long, ovate-oblong, 

 acute : rays more spreading ; pedicels a line or two long, not exceeding the barren 

 flowers : fruit 6 or 7 lines long, rarely bristly on the ribs at base. Proc. Am. 

 Acad. viii. 386. 



Collected by Kellogg & Harford in shady woods at Cahto, California, and by Hall at the foot of 

 the Cascade Mountains, Oregon. 



3. Gr. Bolanderi, Gray. Stout, somewhat puberulent : leaflets ovate, acute, 

 rather deeply gash-toothed and lobed : rays spreading ; pedicels 1 or 2 lines long, 



