258 UMBELLIFER^E. PSEUDOOYMOPTERCS. 



CYMOPTEKUS. 



bractlets; pedicels 4 lines long: fruit glabrous, broadly elliptical or nearly 

 orbicular, emarginate, with wings broader than the body, 4 lines long, 

 oil-tubes 3 or 4 in the intervals 4-10 on the commissure. On dry hill- 

 sides, near Waldo, Josephine county, Oregon. 



11 PSEUDOCYMOPTERUS C. & R. Rev. Umb. 74. 



Mostly low glabrous perennials from a thick elongated root, 

 with bipinnate leaves, no involucre and involucels of narrow 

 bractlets mostly longer than the flowers. Calyx-lobes evident. 

 Fruit ovate or oblong. Carpel with dorsal and intermediate ribs 

 very prominent and acute : lateral wings rather broad and thick- 

 ish, distinct from those of the other carpel. Oil-tubes 1-4 in 

 the intervals, 2-6 on the commissure. 



P. anisatus C. & R. 1. c. 75. Acaulescent, cespitose from a much 

 branched caudex which is more or less covered with the remains of old 

 leaves: leaves on long petioles, narrow, somewhat rigid, pinnate and the 

 leaflets pinnately-parted into linear pungently acute segments : peduncles 

 6-12 inches long exceeding the leaves: umbel unequally 5-12-niyed, with 

 involucels of linear-subulate bractlets exceeding the white or yellow 

 flowers: rays j^-3 inches long: pedicels 1-3 lines long: fruit about 2 lines 

 long, the carpel irregularly 2-5-winged; oil-tubes 1-3 in the intervals, 2 or 

 4 on the commissure : seed-face plane. Oregon to Wyoming, Utah and 

 Colorado. 



* * Fruit not flattened either way or but slightly so. 



-+- Fruit with all the ribs conspicuously winged ; stylopodium de- 

 pressed or wanting. 



12 CYMOPTERUS Raf. Journ. Phys. 1819, 100. 



Mostly low perennials from thick elongated roots with more 

 or less pinnately compound leaves, mostly no involucre, promi- 

 nent involucels and white, yellow or purple flowers. Calyx- 

 lobes more or less prominent. Fruit usually globose, somewhat 

 flattened laterally if at all. Carpel somewhat flattened dorsally 

 with mostly 5 broad thin equal wings, lateral wings distinct 

 from those of the other carpel. Stylopodium depressed. Oil- 

 tubes 1 several in the intervals, 2-8 on the commissure. 



C. terebmthinus T. & G. Fl. i, 624. Shortly caulescent, decumbent, 

 6-18 inches long, leafy at base: leaves rather rigid, thrice pinnate; leaflets 

 a line long or less, linear or linear oblong, entire or toothed, mucronate: 

 umbel with 4-15 fertile rays, mostly no involucre, and involucels of short 

 linear or lanceolate bractlets; rays >-2 inches long; pedicels 1-5 lines 

 long: flowers yellow : fruit 3-4 lines long, the 5 carpel- wings broad and 

 thin: oil-tubes 2-5 in the intervals, 5-10 on the commissure. Brit. Colum- 

 bia to California, Wyoming and Colorado. 



C glaucus Nutt. Journ. Philad. Acad. vii, 28. Leaves and peduncles 

 clustered at the summit of a short caudex, more or less scabrous-puberu- 

 lent: leaves tripinnate the ultimate segments crowded, linear-oblong, 

 with revolute margins : peduncles at first short, elongated in fruit and 

 exceeding the leaves : umbels 5-15-rayed, with an involucre of setaceous 

 bracts or none and involucels of linear acute bractlets ; rays 4-12 lines 

 long; pedicels 2-3 lines long; flowers white: fruit 2-3)4 lines long, the 2-5 



