620 



UMBELUKKKAK (1'AHSLEY FAMILY) 



Perennials of dry ground, nearly or quite acaulescent Petals yellow or white. 

 (Name from \/j.a, a border, referring to the winged fruit.) PEVCEDANT 

 Am. auth., but scarcely of L. 



1. L. orientale (Joult. & Hose. Pubescent, 1-2 din. high ; leaves bipinnate ; 

 petals white or pinkish ; fruit nearly round ; dorsal ribs indistinct. (Pcuced- 

 anum nudicaule Nutt., in part.) Gravelly soil, Minn, to la., Kan., and westw. 



2. L. daucifdlium (Nutt.) Coult. & Rose. Leaves finely dissected; petals 

 yellow; fruit oval; dorsal ribs prominent. (Peucedannm villosum Nutt., in 

 part.) Barrens, w. Mo. to Neb. and Tex. 



35. PSEUDOTAENIDIA Mackenzie. 



Calyx-teeth short, thiekish. Petals inferentially yellow. Fruit thickish, 

 strongly compressed dorsally, oblong-lanceolate ; carpels obcompressed, with 

 slender dorsal ribs and broad somewhat corky lateral wings. Oil-tubes mostly 

 solitary in the intervals. Glabrous erect perennial, with 2-3-ternate leaves, 

 entire leaflets and exinvolucrate compound umbels. (Name from i/'eOSos, false, 

 and Taenidia, to which this recently discovered genus possesses a marked habital 

 resemblance. ) 



1. P. montana Mackenzie. Slender, erect, 5-8 dm. high; root slightly 

 thickened ; petioles broad and clasping ; leaflets elliptical to lance-ovate or 

 -oblong, entire, thin ; umbels 6-12-rayed ; involucels none or inconspicuous ; 

 fruit 6 mm. long. Clayey and rocky mountain slopes, Kate's 

 Mt., W. Va. (Mackenzie} and Luray Cavern, Va. (Steele). 



36. POLYTAENIA DC. 



Calyx-teeth conspicuous. Fruit obovate to oval, much flat- 

 tened dorsally ; dorsal ribs small or obscure in the depressed back, 

 the lateral with broad thick corky closely contiguous wings form- 

 ing the margin of the fruit ; oil-tubes 12-18 about the seed and 

 many scattered through the thick corky pericarp. A perennial 

 mostly glabrous herb, with 2-pinnate leaves (upper opposite and 

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

 involucels, and bright yellow flowers in May. (Named from 

 Ti-oXtf-, many, and ratvia, a fillet, alluding to the 

 numerous oil-tubes.) 



1. P. Nuttallii DC. Plant 6-10 dm. high ; 



pedicels and involucels pubescent. Barrens, Mich, to n. Ala., 



Tex., Okla., la., and Wise. FIG. 837. 



37. PASTINACA L. PARSNIP 



Calyx-teeth obsolete. Fruit oval, very much flattened dor- 

 sally ; dorsal ribs filiform, the lateral extended into broad wings, 

 which are strongly nerved toward the outer margin ; oil-tubes 

 small, solitary in the intervals, 2-4 on the commissure; stylo- 

 podium depressed. Tall stout glabrous biennial, with pinnately 

 compound leaves, mostly no involucre or involucels, and yellow 

 flowers. (The Latin name, from pastus, food. ) 



1. P. RATlvA L. Stem grooved ; leaflets ovate to oblong, 

 cut-toothed. Waste places, open rich soil, etc. (Nat. from 

 Eu.) FIG. 838. 



38. LEViSTICUM [Kivinius] Hill. LOVAGB 



Calyx-teeth obscure. Petals greenish-yellow. Fruit oblong, rounded at each 

 end, strongly ribbed, the lateral ribs moderately winged ; oil-tubes solitary in 

 the intervals, 2 on the commissure ; seed flattish 0.11 the inner face. Stout 



88t. P. Nuttallii 

 x3. 



P. saliva x8. 



