UMBKI.LIFKK/E. (I'AKSLKV lAMILY.) 203 



r.ately com]iouii(l leaves, mostly no involucre or invoUu-cls.and vollow flowers. 

 (The Latin name, from jiastus, food.) 



P. SATivA, L. Stem grooved; leaflets ovate to oldung, eut-toothcd. — 

 Introduced everywhere. (Adv. from Ku.) 



8. POLYT^NIA, DC. 



Calyx-leeth conspieuous. Fruit ohovate to oval, much flattened (h.rsallv; 

 dorsal ribs small or obscure in the depressed back, the lateral witli broad tliick 

 corky closely contiguous wings forming the margin of the fruit; oil-tubes 

 12- 18 about the seed and many scattered tlirough the thick corky pericarj). — 

 A perennial mostly glabrous herb, with 2-pinnate leaves (upper oj)posite and 

 3-cleft),the segments cuneate and incised, no involucre, narrow involucels, and 

 bright yellow flowers in May. (Named from ttoXvs, vuinii, and raivia, (ijillet, 

 alluding to the numerous oil-tubes.) 



1. P. Nuttallii, DC. riant 2-3° high; ])edicels and involucels pubes- 

 cent. — Barrens, Mich, to N. Ala., west to the Kocky Mts. 



9. PEUCEDANUM, L. 



Calyx-teeth mostly obsolete. Fruit roundish to oblong, much flattened 

 dorsally; dorsal ribs filiform and approximate; the lateral extended into 

 broad closely coherent wings ; oil-tubes 1 - 4 in the intervals, 2-6 on the com- 

 missure. — Dry ground acaulescent (or short caulescent) herbs, with fusiform 

 roots, dissected leaves, no involucre, yellow or white flowers, and styloj)odium 

 depressed or wanting. (The ancient Greek name.) 



1. P. nudicaille, Nutt. Pubescent, with peduncles 3-8' high; leaves 

 hipinnate, the snid/l oblong ser/vients entire or toothed ; involucels of scarious-mar- 

 gined {often purplish) lanceolate bractlets ; fioicers white or pinkish ; fruit almost 

 round, emarginatc at base, glabrous, with wings hardly as broad as the body, 

 and indistinct or obsolete dorsal ribs; oil-tubes solitary in the intervals. — Minn, 

 to Iowa and Kan., and westward. One of the earliest spring bloomers. 



2. P. foeniculaceum, Nutt. Tomentose or glabrous, with peduncles 

 8-12' long; leaves Jinclij dissected, with short fd if orm segments; involucels 

 gamophijllous, 5 - 1 -cleft, with co7ispicuousli/ hairij margins ; flowers yellow ; fruit 

 broadly oblong, glabrous, Avith wings half as broad as the body, and prominent 

 dorsal ribs ; oil-tubes 1-3 in the intervals. — Minn, to Tex. March - Ajiril. 



3. P. villdsum, Nutt. More or less puliescent throughout, 3 -8' higli ; 

 leaves finely dissected, with I'ery numerous narrow crowded segments; involurds 

 of ovate to linear bractlets ; flowers yellow ; fruit oval, with wings half a.«» l)road 

 as the body, and prominc7it dorsal ribs; oil-tubes 3 or 4 in the interval.^. — Minn, 

 to Neb. and Dak., southwestward to Ariz. l?oot much elongated. 



10. CYMOPTERUS, Kaf. 

 Calyx-teetli more or less prominent. Fruit usually globose, witli all the 

 ribs cons])icuously winged; oil-tubes one to several in the intervals, 2-8 on 

 tlie commissure. Stylo])odium depressed. Seed-face slightly concave. — 

 Mostly low (often cespitose) glabrt)us ])erennials, fmni a thick elongated root, 

 with more or less pinnately compound leaves, with or without an involucre, 

 prominent involucels, and white flowers (in ours). (From Kv/xa, a uavr, and 

 Trr(p6u, a wing, referring to the often undulate wings.) 



