. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 620 UMBELLIFERAE (PARSLEY FAMILY) Perennials of dry ground, nearly or quite acaulesoent. Petals yellow or white. (Name from XC^a, a border, referring to the winged fruit.) Peucjsdanum of Am. autli., but scarcely of L. 1. L. orientale Coult. & Rose. Pubescent, 1-2 dm. high ; leaves bipinnate; petals white or pinkisli ; fruit nearly round ; dorsal ribs indistinct. (Peuced- auum nudicaule Nutt., in part.)—Gravelly soil, Minn, to la., Kan., and
. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 620 UMBELLIFERAE (PARSLEY FAMILY) Perennials of dry ground, nearly or quite acaulesoent. Petals yellow or white. (Name from XC^a, a border, referring to the winged fruit.) Peucjsdanum of Am. autli., but scarcely of L. 1. L. orientale Coult. & Rose. Pubescent, 1-2 dm. high ; leaves bipinnate; petals white or pinkisli ; fruit nearly round ; dorsal ribs indistinct. (Peuced- auum 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 I'ex. 38. PSEUDOTAENIdIA Mackenzie. Calyx-teeth short, thickish. Petals inferentially yellow. Pruit thiekish, 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/'eC5os, 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; involuoels none or inconspicuous; fruit 0 mm. long.— Clayey and rocky mountain slopes, Kate's Mt., W. Va. (Mackenzie) and Luray Cavern, Va. (Steele). 36. POLYTAtNIA 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
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