620 



UMBELLIFERAE (PARSLEY FAMILY) 



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

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

 Am. auth., but scarcely of L. 



1. L. orientale Coult. Rose. Pubescent, 1-2 dm. high ; leaves bipinnate ; 

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

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



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

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

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



35. PSEUDOTAENfDIA Mackenzie. 



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

 strongly compressed dorsally, oblong-lanceolate ; carpels obcom pressed, 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 ^-eOSoj, false, 

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

 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 

 "" o ^" many, and raivla, a fillet, alluding to the 

 numerous oil-tubes.) 



1. P. Nuttallii DC. Plant 5-10 dm. high ; 



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



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



37. PASTINACA L. PABSNIP 



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. sAiivA L. Stem grooved ; leaflets ovate to oblong, 

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

 Eu.) FIG. 838. 



38. LEVfSTICUM [Rivinius] 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 on the inner face. Stout 



837 P Nuttallii 



p 



