628 AMMIACEAE 



to linear-lanceolate, 5-10 cm. long; pedicels 2-4 mm. long; fruit narrowly oblong; 

 glabrous, 6-12 mm. long, 3-4 mm. wide. P. tritcrnatum (Pursh) Nutt. Hill- 

 sides: Calif. — Wyo.— Alta. — B.C. Suhmonl. My-Je. 



26. C. robustior Coult. & Rose. Perennial, with a taproot; stem 3-6 dm. 

 high; leaves puberulent below, three to four times ternate, with linear-lanceolate 

 to oblong divisions, 1-3 cm. long; fruit oblong, 12-14 mm. long, 5 mm. wide. P. 

 triternatum macrocarpum Coult. & Rose. P. triternalum robuslius Coult. & Rose. 

 Vallej^s: Ore. — Ida. — Wash. Son. — Submo7it. Ap-Je. 



27. C. anomala M. E. Jones. Perennial, with a large taproot; stem 3-5 

 dm. high, stout, somewhat puberulent; leaves ternate, then bipinnate; leaflets 

 linear-oblong or oblanceolate, mostly obtuse, 1-7 cm. long; bractlets linear or 

 setaceous; fruit elliptic, 10-12 mm. long, 4-5 mm. broad; wings not half as 

 broad as the body. Lomatium anomalum M. E. Jones. Hillsides and slopes: 

 Ida. — Ore. Suhmont. My-Je. 



28. C. nudicaulis (Pursh) M. E. Jones. Perennial, with a long fleshy tap- 

 root; stem 3-6 dm. high, glabrous; leaves biternate, ternately quinate, or some- 

 times ternate; leaflets thickish, ovate or lanceolate, 2.5-5 cm. long, entire or 

 toothed at the apex; bractlets none; fruit narrowly elliptic, 9-14 mm. long, 3-6 

 mm. wide, narrowly winged. Gravelly soil: Calif. — Ida. — B.C. Son. — Sub- 

 7)iont. My-Je. 



29. C. platyphylla Coult. & Rose. Perennial, with a taproot; stem 2-4 

 dm. high; leaves once or twice ternate; leaflets ovate, orbicular or obovate, entire 

 or toothed at the apex; bractlets none; fruit 8-12 mm. long, 5-6 mm. wide; wings 

 narrow. P. latifolium Nutt. P. Nuttallii S. Wats. Lomatium platyphijUum 

 Coult. & Rose. Dry plains: Ore. — Nev. — Ida. — Wash. Son. — Suhmont. Ap- 

 Je. 



33. LEPTOTAENIA Nutt. Wild Parsnip. 



Tall, stout, acaulescent perennials, with thick fusiform roots. Leaves large, 

 pinnately decompound. Flowers yellow -or purplish, in large umbels. Bracts 

 few or none; bractlets numerous, small. Calyx-teeth obsolete or minute. Fruit 

 strongly flattened dorsally, oblong or elliptic, glabrous. Stylopodium wanting. 

 Dorsal and intermediate ribs filiform or obscure, the lateral ones with thick and 

 corky wings. Oil-tubes 3-6 in the intervals, 4-6 on the commissural side, mostly 

 small, sometimes obsolete. Seeds very flat; face plane or slightly concave. 



Flowers yellow or salmon-colored. 



Foliage puberulent; dorsal ribs faint; flowers yellow. 



Fruit sessile or nearly so; stamlnate flowers with long pedicels. 1. L. foliosa. 

 Fruit with pedicels longer than those of the stamlnate flowers. 



Fruit 8-12 mm. long, usually \\'ithout oil-tubes; leaves finely dissected into 



linear divisions. 2. L. multifida. 



Fruit 14-18 nun. long, with oil-tubes; leaves less dissected into oblong divisions. 



3. L. Eatoni. 

 Foliage glabrous: dorsal ribs strong. 



Fruit broadly oblong, 5-6 mm. broad. 4. L. sahnoniflora . 



Fruit narrowly oblong, 4 mm. broad. 5. L. filicina. 



Flowers purple. 6. L. purpurea. 



1. L. foliosa (Hook.) Coult. & Rose. Stem about 6 dm. high; leaves twice 

 or thrice ternately compound, then twice or thrice pinnatifid, with linear lobes, . 

 slightly puberulent; bracts several, linear; bractlets few, linear; fruit almost 

 sessUe; stamlnate flowers on slender pedicels. Hillsides: Ida. Suhmont. My-Je. 



2. L. multifida Nutt. Stem 3-10 dm. high; leaves twice or thrice ternate, 

 then three or four times pinnatifid into linear divisions, more or less puberulent; 

 involucre usually none; bractlets few, linear-filiform; fruit 8-12 mm. long; dorsal 

 ribs ahnost obsolete. Rich soil in the moimtains: Alta.- — Colo. — Calif. — B.C. 

 Suhmont. — Mont. My-Jl. 



3. L. Eatoni Coult. & Rose. Stem 3-10 dm. high; leaves twice ternate, 

 then once or twice pinnate; leaflets ovate, cleft and lobed, with oblong or lance- 

 oblong divisions; bracts few, linear-subulate, or none; fruit 14-18 mm. long, 

 7-10 mm. wide, often with 4-6 small oil-tubes in the intervals. Hills and moun- 

 tains in rich soil: Wyo. — Colo. — Nev. — Ida. Suhmont. — Mont. Je-Jl. 



