UMBELLIFERAE. I77 



• 



Oil tubes more than one in each interval. 

 Stylopodium conical. 



Fruit globose. 265. Berula, 183. 



Fruit oblong. 266. Ligusticum, 183. 



Stylopodium flat or none. 



Ribs of the fruit winged. 267. Pteryxia, 184. 



Ribs of the fruit not winged. 268. Sium, 184. 



252. ERYNGIUM. 



Glabrous perennials; leaves often rigid, coriaceous, entire, 

 spinosely toothed, or divided; flowers white or blue, sessile, in 

 dense bracteate heads ; sepals very prominent, rigid and persistent ; 

 stylopodium wanting; styles short or long, often rigid; fruit 

 ovoid, flattened laterally, covered with hyaline scales or tubercles; 

 carpel with ribs obsolete; oil-tubes mostly 5, 3 dorsal and 2 

 commissural; seed face plane. 



Eryngium articulatum Hook. Erect, 30-70 cm. tall; branches dichoto- 

 mous, usually with a peduncled head in the forks; lower leaves mostly reduced 

 to long nodose petioles sometimes bearing a lanceolate entire or spinulose- 

 serrate blade; upper leaves opposite, sessile, usually jagged near the base; 

 heads globose, blue; bracts lanceolate, spiny-toothed, exceeding the head; 

 calyx-lobes lanceolate, cuspidate, 4-5 mm. long; style shorter than the calyx- 

 lobes. Wet places, not common. 



253. SANICULA. Sanicle. 



Perennial tall rather glabrous herbs, with ternate or palmate 

 leaves ; flowers perfect and staminate mixed in heads in few-rayed 

 umbels, yellow or green; involucral bracts few; calyx-teeth 

 evident, persistent; fruit globular, the carpels not separating, 

 ribless, the whole surface covered with hooked bristles. 



Sanicula septentriOnalis Greene. Erect, slender, 10-35 cm. high; basal 

 leaves few, small, ternate, or biternate, the obovate segments cleft or toothed; 

 cauline leaves few, more sharply toothed; peduncles arising singly along the 

 stem; umbels with 3-5 rays; involucre of pinnatifid leaf-like bracts; fruiting 

 rays 1.5-3.5 cm. long; flowers yellow; fruit 4 mm. long. Blue Mountains. 



254. 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, acme 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 

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