. 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 102d meridian. Botany; Botany. 596 ONAGRACEAE. Vol. 4. Oenothera Oakesiana Robbins. Oakes' Evening-Primrose. Fig. 3040. Oenothera biennis var. Oakesiana A. Gray, Man Ed 5, 178. 1867. Oenothera Oakesiana Robbins; S. Wats. Bibl. Indtx i: 383. 1878. Onagra Oakesiana Britton, Mem. Torn Club 5: 233. 1894. Resembling the two preceding species, usually annual, dull green, pubescent with appres
. 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 102d meridian. Botany; Botany. 596 ONAGRACEAE. Vol. 4. Oenothera Oakesiana Robbins. Oakes' Evening-Primrose. Fig. 3040. Oenothera biennis var. Oakesiana A. Gray, Man Ed 5, 178. 1867. Oenothera Oakesiana Robbins; S. Wats. Bibl. Indtx i: 383. 1878. Onagra Oakesiana Britton, Mem. Torn Club 5: 233. 1894. Resembling the two preceding species, usually annual, dull green, pubescent with appressed velvety hairs. Stem i°-4° tall, mostly simple; leaves narrow, the basal narrowly oblanceolate] 3'-io' long, the cauline lanceolate or linear-lan- ceolate, all acute, distantly dentate, sessile or short-petioled; flowers yellow, nocturnal, I'-ii' broad; spikes 4'-2o' long; calyx villous, its tube about l' long, its segments linear-lanceolate, one- half as long as the tube, rather prominently ap- pendaged below the tip; petals obovate, i'-i'long; capsule linear-pyramidal, gradually narrowed to the summit, li'-li' long, 4-sided, curved; seeds prismatic, about l" long, the faces reticulated. Sandy soil, Massachusetts to Long Island. Summer. Oenothera strigosa Rydb. (O. canovirens Steele), of the Central States, ranging eastward to Illinois; resembles O. Oakesiana but has some long hairs and unappendaged calyx-segments. It may not be distinct froffi 0. biennis. 5. Oenothera argillicola ^lackenzie. Narrow- leaved Evening-Primrose. Fig. 3041. Oe, argillicola Mackenzie, Torreya 4: 56. 1904. Onagra argillicola Mackenzie, Torreya 4: 57. 1904. Stems several from the same root, finely puberu- lent, 3°-4i° high. Rosette-leaves oblanceolate, 2j'-6' long, 8" wide or less, acute, sinuate, tapering into long petioles; stem-leaves Hnear-lanceolate, 2i'-2V long, glabrous, or slightly puberulent; calyx-tube very slender, glabrous, i}'-ij' long; petals obcordate, crenulate, li'-ij
Size: 1362px × 1835px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
