UMBELLIFERAE. 179 



Heracleum lanatum Michx. Cow Parsnip. Very stout, 1-2 m. tall, 

 pubescent throughout; leaves ternate or biternate; petioles much dilated; 

 leaflets round-cordate, 10-25 cm. broad, irregularly lobed and dentate; rays 

 5-15 cm. long; fruit obcordate, 8-12 mm. broad, the oil-tubes conspicuous. 

 Abundant along streams. 



257. ANGELICA. 



Stout perennial herbs; leaves ternate, then pinnate, rarely 

 simply pinnately compound ; involucre scanty or none ; involucels 

 of small bractlets or none; flowers in large terminal umbels; 

 calyx- teeth mostly obsolete ; stylopodium conical; fruit flattened 

 dorsally, ovate or oblong, glabrous or pubescent; calyx-tube 

 prominent, crenulate; carpel with strong ribs, the lateral ribs 

 usually broadly winged, distinct from those of the other carpel, 

 forming a double- winged margin to the fruit; oil-tubes 1-several, 

 in the intervals, or indefinite, 2-10 on the commissural side; 

 seed face plane or somewhat concave. 



Ovaries glabrous; oil tubes solitary in the lateral intervals. A. lyallii. 



Ovaries puberulent; oil tubes in pairs in the lateral intervals. A. canbyi. 



Angelica lyallii Wats. Stout, 60-150 cm. tall, glabrous or the inflorescence 

 sometimes puberulent; leaves ternate, then once or twice pinnate; leaflets 

 ovate or lanceolate, acute, serrate or dentate, 2-10 cm. long; umbel many- 

 rayed; involucre and involucels wanting; fruit oblong, 4r-6 mm. long, the 

 lateral wings about as broad as the body; oil tubes solitary in all the intervals. 

 In wet places in the mountains. 



Angelica canbyi Coult. & Rose. Rather slender, 60-90 cm. high, glabrous 

 except the inflorescence; leaves bipinnate; leaflets linear to ovate, acute, 

 laciniately toothed, 2.5-5 cm. long; umbel 10-20-rayed; involucre and in- 

 volucels wanting; fruit oblong, 6 mm. long, the lateral wings half as broad as 

 the body; oil tubes solitary in the dorsal intervals, in pairs in the lateral. 

 High ridges of the Blue Mountains at the lower timber line. 



258. COGSWELLIA. 



Acaulescent or short caulescent dry ground perennials; roots 

 fusiform or tuberous; leaves ternate to dissected, sometimes pin- 

 nate; involucre none; involucels mostly present; flowers yellow, 

 white or purple; calyx- teeth obsolete, very rarely evident; 

 stylopodium wanting; fruit strongly flattened dorsally, oblong 

 to orbicular; carpel with filiform and approximate dorsal and 

 intermediate ribs and winged laterals coherent till maturity 

 with those of the other carpel ; pericarp thin ; oil-tubes 1-several 

 in the intervals (rarely obsolete), 2-10 on the commissural side; 

 seed dorsally flattened, with plane face (rarely slightly concave). 



Low plants arising from thick tubers. 



Flowers yellow; tubers elongate. C. cous. 



Flowers white; tubers globose. 



Fruit puberulent. C. gormani. 



Fruit glabrous. 



