OF THE WASATCH REGION 67 



4. HERACLETJM. Cow Parsnip. 



Coarse erect perennials with large, ternately decompound 

 leaves. Flowers in compound umbels. Bracts of the involucre 

 (if present) few and deciduous; involucels of many narrow 

 bracts. Outer petals of the marginal flowers much enlarged. 

 Stylopodium thick, conic. Oil-tubes 1 in each interval. 



1. H. lanatum Michx. Stems ribbed. 4-8 ft. high. Leaflets 

 lobed and cut-toothed, 4-10 inches across; lower surface downy. 

 Fruit somewhat downy. In wet places along streams and 

 around cold springs in the mountains. May-August. 



5. COGSWEL,L,IA. (Lomatium; Peucedanum in part.) 



Mostly acaulescent perennials with thickened roots (usually 

 fusiform or tuberous). Leaves simple or compound. Flowers 

 white, yellow or purple, without involucre but usually with 

 involucels. Calyx-teeth usually wanting. Stylopodium none. 

 Fruit strongly flattened dorsally. Oil-tubes 1-several in the 

 intervals or rarely wanting. 



Roots globose or moniliform. 



Leaves 1-2 pinnate; umbellets open; pedicels slen- 

 der 1. C. amfoigua 



Leaves dissected; umbellets compact; pedicels very 



short 2. C. leptoearpa 



Roots more or less cylindrical. 



Bractlets of the involucel conspicuous 3. C. oriental!* 



Bractlets of the involucel small or none. 



Fruit from narrowly to broadly oblong. 



Leaves 1-2 ternate 4. C. platycarpa 



Leaves mostly much dissected, the segments 



short 5. C. millefulia 



Fruit broadly linear to narrowly elliptical 6. C. bicolor 



1. C. ambigrua (Nutt.) Jones. (L. ambiguum (Nutt.) C. & 

 R.) Acaulescent. or caulescent and then as much as a foot 

 high; from tuberous and sometimes moniliform roots. Leaves 

 on long petioles dilated at the base; the leaflets long and nar- 

 row. Umbel unequally 8-18-rayed, without bractlets. Flowers 

 yellow. Fruit glabrous; narrowly oblong and with very narrow 

 wings. Oil-tubes solitarv in the intervals. Near streams. 

 May. 



2. C. leptoearpa (Nutt.) Jones. (L. leptocarpurn (Nutt.) C. 

 & R.) Acaulescent and glabrous, from deep-seated tuberous 

 roots. Leaves ternate, then pinnate into linear segments. 

 Umbels unequally rayed, the rays few; involucels of small 

 linear bractlets. Flowers yellow. Fruit densely clustered: 

 linear; nearly sessile; with very narrow wings. Oil-tubes 

 solitary in the intervals. Dry hills. April-July. 



3. C. orientalis Jones. (Peucedanum nudicaule Nutt.; L. 

 orientale C. & R.) Acaulescent or shortly caulescent from 

 a long, thick root. Leaves bipinnate, the short leaflets toothed. 

 Umbel unequally 5-8-rayed. with involucels of lanceolate, 

 scarious-margined, distinct and often purplish bractlets. 

 Flowers white or pinkish. Fruit glabrous, nearly round; with 

 wings narrower than the body. Oil-tubes solitary in the in- 

 tervals. Seed-face plane. Dry sunny hillsides. May. 



