. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. ONAGRACEAE. Vol. I. Kneiffia linifolia ( Xutt.) Spach. Thread-leaved Sundrops. Fig. 3049. Oenothera linifolia Nutt. Journ. Acad. Phila. 2 : 120. 1821. Kneiffia linifolia Spach, Nouv. Ann. Mus. Par. 4 : 368. 1835. Erect, very slender, simple or branched. 6'-i8' high, glabrous or nearly so below, finely pubescent above. Stem-leaves filiform-linear, entire, crowded,
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. ONAGRACEAE. Vol. I. Kneiffia linifolia ( Xutt.) Spach. Thread-leaved Sundrops. Fig. 3049. Oenothera linifolia Nutt. Journ. Acad. Phila. 2 : 120. 1821. Kneiffia linifolia Spach, Nouv. Ann. Mus. Par. 4 : 368. 1835. Erect, very slender, simple or branched. 6'-i8' high, glabrous or nearly so below, finely pubescent above. Stem-leaves filiform-linear, entire, crowded, 6"-i5" long; basal leaves tufted, oblanceolate or spatulate, petioled, about i' long; flowers in loose spike-like ra- cemes, yellow, diurnal, 3"-4" broad; calyx- lobes short, reflexed, the tube about i" long, rather shorter than the ovary; stigma-lobes very short; capsule obovoid, sessile or very nearly so, puberulent, sharply 4-sided but not winged, 2"-^" long. In dry soil. Illinois to Kansas, south to Geor- gia, Louisiana and Texas. May-July. 2. Kneiffia Alleni (Britton; Small. Allen's Sundrops. Fig. 3050. Oenothera frnticosa var. humifusa Allen. Bull. Terr. Club i: 3. 1870. Not Oe. humifusa Nutt. 1818. Kneiffia linearis Alleni Britton, Mem. Torr. Club 5 : 235. 1894. Kneiffia Alleni Small. Bull. Torr. Club 23: 177. 1896. Low, perennial, finely appressed-pubescent, stems decumbent, at length diffusely branched, 3'-2° long, wiry and zigzag. Leaves oblanceolate to lanceolate, ¥~iV long, usually obtuse, undulate, sessile or short- petioled; flowers yellow, about 3'-l' broad; racemes 1-2' long, usually interrupted; villous, its tube 2"-3" long, striate, its segments linear-oblong, as long as the tube; petals orbicular-obovate, notched at the apex ; capsules club-shaped, 3"-4" long, winged, shorter than the pedicels; seeds obovoid, to oblong, ¥' long, minutely pitted in rows. In sand, eastern Long Island. Probably a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
