UMBELLIFERAE. 259 



linear-oblung, 2.5 mm. long; umbels unequally 3-6-rayed; involucral bracts 

 resembling the leaves; involuccls usually entire; fruit oblong, armed with rows 

 of hooked prickles. 



In fields and prairies, Vancouver Island, British Columbia, and adjacent 

 Washington. Not otherwise known west of the Cascade Mountains but com- 

 mon in the interior and southward into California. 



342. OSMORHIZA. Sweet Cicely. 



Glabrous to hirsute perennials, 30-90 cm. high; roots thick, 

 aromatic; leaves ternately decompound; leaflets broad, ovate to 

 lanceolate, variously toothed; involucre and involucels few- 

 leaved or wanting; flowers white or purple, in few-rayed and 

 few^-fruited umbels; calyx- teeth obsolete; stylopodium conical, 

 sometimes depressed; styles mostly short; fruit linear to linear- 

 oblong, more or less attenuate at base, obtuse, acute or beaked at 

 apex, glabrous or bristly on the ribs; carpels slightly flattened 

 dorsally or not at all, nearly pentagonal in section, with equal 

 ribs and thin pericarps, often tapering into a long tail-like 

 attenuation at the base; oil-tubes obsolete in the mature fruit 

 (often numerous in young fruit) ; seed face from slightly concave 

 to deeply sulcate. 



Fruit glabrous. " 0. amhigua. 



Fruit with bristly ribs. 



Flowers purple; fruit short-beaked. 0. purpurea. 



Flowers white. 



Foliage strlgose-pubescent; fruit beaked. O. brevipes. 



Foliage glabrous or nearly so. 



Fruit with a conspicuous sharp beak. 0. divaricata. 



Fruit constricted below the apex and with a truncate 



tip. 0. leibergii. 



Osmorhiza ambigua (Gray) Coult. & Rose. Glabrous except the pubes- 

 cent nodes; stems branched, 30-60 cm. high; leaves twice or thrice ternate; 

 leaflets ovate, acute, incisely toothed and cleft, thin, 3-6 cm. long; umbel of 

 4-8 rays, without bracts; rays 3-6 cm. long, widely spreading; fruit 12-18 mm. 

 long, beaked, attenuate at base. 



In the mountains at about 1500 m. altitude, rare. Goat Mountains, Allen. 



Osmorhiza purpurea (Coult. & Rose) Suksdorf. Nearly glabrous; stems 

 10-60 cm. high; leaves once or twice ternate; leaflets ovate to lanceolate, acute 

 to acuminate, incisely lobed and toothed, 2-7 cm. long; umbel with 2-4 rays, 

 these 5-7 cm. long; fruit hispid at base, 10-12 mm. long, slightly beaked at 

 apex. 



Mount Hood, Oregon, Henderson; Olympic Mountains, Washington, 

 Lamb; and northward to Alaska. 



Osmorhiza brevipes (Coult. & Rose) Suksdorf. (Wasliingtonia breinpes 

 Coult. & Rose.) Similar to 0. divaricata but pubescent with white hairs; 

 pedicels shorter, 4-12 mm. long, decidedly shorter than the fruit, which is 

 14-16 mm. long. 



In open woods, Washington to California. 



Osmorhiza divaricata Nutt. Glabrous or nearly so, 30-60 cm. tall; leaves 

 bitcrnate; leaflets ovate or lanceolate, acute or acuminate, thin, coarselv 



