CARROT FAMILY 629 



4. L. salmoniflora Coult. & Rose. Stem 3-5 dm. high, glabrous; leaves 

 large, biternate, then twice or thrice pinnately decompound, with short linear- 

 filiform segments, glabrous; bracts none; bractlets filiform; flowers salmon- 

 colored; fruit oblong, 10 mm. long; dorsal ribs strong but low; oil-tubes solitary 

 in the intervals. Basaltic rocks: Ida. Wash. Submont. Ap-My. 



5. L. filicina M. E. Jones. Stem about 1 m. high, glabrous; leaves with 

 inflated petioles, ternate, then pinnately decompound into filiform short divi- 

 sions; bractlets few, inconspicuous; fruit 12-15 mm. long, 4 mm. wide; lateral 

 wings very narrow; oil- tubes solitary in the intervals, 2-4 on the commissural 

 side; seed-face nearly flat. Mountains: Ida. Submont, Jl. 



6. L. purpurea (S. Wats.) Coult. & Rose. Stem about 3 dm. high; leaves 

 twice or thrice ternately dissected into linear or filiform divisions, perfectly gla- 

 brous; involucres usually none; bractlets several, linear, acuminate; fruit 18-24 

 mm. long, as long as the pedicels; lateral ribs very corky; oil-tubes 3 in the inter- 

 vals, 4 on the commissure; dorsal ribs evident. Rich soil: Ore. Alta. B.C. 

 Submont. My-Je. 



34. CYNOMARATHRUM (Nutt.) Coult. & Rose. 



Acaulescent perennial) with multicipital caudices densely covered by old leaf- 

 sheaths. Leaves narrow in outline, pinnately dissected, with very narrow divi- 

 sions. Flowers yellow or perhaps sometimes white. Calyx-teeth evident. 

 Stylopodium evident, flat, apparently somewhat spongy. Fruit strongly flat- 

 tened dorsally, oblong. Dorsal and intermediate ribs sharp or more or less 

 winged, the lateral ones broadly winged. Oil-tubes mostly several in each 

 interval, or obscure. Seed-face plane. 



Leaves glabrous. 

 Leaves bipinnate. 



Leaf-segments linear. 



Pedicels in fruit 1-6 mm. long. 



Divisions of the leaves elongate-linear, 1-5 cm. long; bractlets 5-10 mm. 



long. 1. C. Nuttallii. 



Divisions of the leaves less than 1 cm. long; bractlets 3-4 mm. long. 



2. C. megarrhizum. 

 Pedicels in fruit 8-16 mm. long; divisions of the leaves short, usually less than 



5 mm. long. 3. C. Parryi. 



Leaf-segments lanceolate. 4. C. latilobum. 



Leaves biternate. 5. C. brecciarum. 



Leaves scabrous. 



Pedicels 12-18 mm. long; wings of the fruit about as broad as the body. 



6. C. Eastwoodae. 

 Pedicels 2-6 mm. long; wings of the fruit half as broad as the body. 



7. C. scabrum. 



1. C. Nuttallii (A. Gray) Coult. & Rose. Scape 2-5 dm. high; leaves pin- 

 nate or bipinnate; leaflets cuspidate, 1-5 cm. long, ascending; bractlets lanceo- 

 late, often more or less united below; petals yellow; pedicels in fruit 2-6 mm. 

 long; fruit elliptic, 8-10 mm. long, 4 mm. wide, narrowly winged. Peucedanum 

 graveolens S. Wats. P. Kingii S. Wats. Dry hills: w Neb. Wyo. Utah. Plain 

 Mont. My-Jl. 



2. C. megarrhizum A. Nels. Scape 1.5-3 dm. high; leaves pinnate or bi- 

 pinnate; leaflets few; ultimate segments linear or oblong, cuspidate, 5-10 mm. 

 long; petals pale yellow; fruit elliptic, 6-8 mm. long, 3-4 mm. broad; wings 

 scarcely half as broad as the body. P. megarrhizum A. Nels. Dry hills: Wyo. 

 Submont. Je. 



3. C. Parryi (S. Wats.) Coult. &, Rose. Scape 2-3 dm. high, glabrous; 

 leaves twice pinnate, 1-3 dm. long; leaflets linear, cuspidate, more or less arcuate- 

 spreading, 4-8 mm. long; bractlets green, linear and entire or some oblanceolate 

 and toothed at the apex; fruit oblong, 10-12 mm. long; lateral wings about half 

 as broad as the body. P. Parryi S. Wats. Rocky ledges: s Utah Nev. 

 Calif. Son. Ap-My. 



4. C. latilobum Rydb. Scape 1-1.5 dm. long, stout; leaves about 1 cm. 

 long, pinnate, glabrous; leaflets entire or 2- or 3-cleft into broadly lanceolate, 

 reticulate, pointed segments, 5-15 mm. long, thick; rays 1-2 cm. long; bractlets 



