332 UMBELLIFER^. 



intervals, obclavate, extending' from the apex downward to or below the 

 middle of the carpel, 2 on the face : seed thin and flat. 



1. H. laiiatnm, Michx. Fl. i. 166 (1803). Stem 3-8 ft. high: leaves 

 ternate, 1 — 2 ft. long, the stout petioles and veins hirsute beneath, the 

 base of the petiole much dilated; leaflets 4 — 10 in. long, rounded and 

 subcordate, the lobes somewhat palmately arranged, acuminate, toothed; 

 rays many, 3 — 6 in. long: fl. large, white, irregular, the outer petals being 

 larger: fr. broadly obovate, 4 — 6 lines long, slightly pubescent. — In wet 

 open ground, or in moist thickets, from the seaboard to the Sierra. 



25. MYRRHIS, Morison (Sweet Cicely). Perennials with thick 

 aromatic roots, rather slender stems not tall, ternately-compound mostly 

 radical leaves: involucres and involucels reduced or obsolete. Flowers 

 white. Calyx-teeth obsolete. Fruit linear to linear-oblong, more or less 

 attenuate at base, acute at summit, glabrous or bristly along the ribs. 

 Carpel nearly pentagonal in section, flattened dorsally if at all. Oil -tubes 

 obsolete in mature fruit. Seed-face slightly concave to deeply sulcate. 



* Involucre and involucels scant or 0; fruit nearly glabrous, not attenuate 



to a slender base. — Genus Glycosma, Nutt. 



1. M. occideutalis, B. & H. f. Gen. PI. i. 897 (1865); Gray, Proc. Am. 

 Acad. vii. 346 (1868); Nutt.; T. & G. Fl. i. 639 (1840), under Glycosma; 

 C. & K Rev. Umb. 119 (1888), under Osmorrhiza. Stoutish, puberulent 

 or pubescent: leaflets oblong, 1}^ — 4 in. long, acute, coarsely serrate, rarely 

 incised: umbel 5 — 12-rayed, naked or with 1 or 2 bracts; rays 1 — 5 in. 

 long, mostly erect; pedicels 1 — 3 lines: fr. 7 — 12 lines long, 1% lines 

 wide, obtuse at base, glabrous, with prominent acute ribs; the mostly 

 conical stylopodium together with the style ^ — 1 line long. — Dry woods 

 in the foothills and at middle elevations. 



2. M. Bolanderi, Gray, 1. c. Osmorrhiza occidentalis, var. Bolanderi, 

 C. & R. 1. c. (1888). Leaflets ovate, incised: pedicels shorter: ribs of 

 carpel obtuse; otherwise as in the preceding, of which it may be a 

 variety only. — Woods of Mendocino Co., Bolander; apparently rare. 



3. M. ambi^ua, Greene. Gray, Proc. Am. Acad. viii. 386 (1872), under 

 Glycosma. Tall, glabrous or hairy at the nodes, the petioles and leaf- 

 veins beneath pilose: leaflets ovate-oblong, acute, 2- or -3-cleft and 

 incisely toothed: fruiting umbel with spreading rays: fr. 6 — 7 lines long, 

 linear-oblong, acutish at each end, the ribs more or less setulose toward 

 the base. — Woods near Cahto, Mendocino Co. 



* * Involucre and, involucels caducous or 0; fruit attenuate at base; ribs 



bristly. — Genus Osmoekhiza, Rafinesque. 



4. M. brachypoda, Greene. Torr.; Dur. PI. Pratt. 89 (1855), under 

 Osmorrhiza. Stout, pubescent or glabrous: leaflets 1 in. long or more, 



