. 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. Genus 7. EVENING-PRIMROSE FAMILY. 595 2. Oenothera biennis L. Common Evening-Primrose. Fig. 3038. Night Willow-herb. Oenothera biennis L, Sp. PI. 346. 1753. Erect, generally stout, biennial, simple and wand-like or branched, i°-6° high, more or less hirsute-pubescent, rarely gla- brate. Leaves lanceolate to ovate-lanceo- late, acute or acuminate, narrowed and s


. 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. Genus 7. EVENING-PRIMROSE FAMILY. 595 2. Oenothera biennis L. Common Evening-Primrose. Fig. 3038. Night Willow-herb. Oenothera biennis L, Sp. PI. 346. 1753. Erect, generally stout, biennial, simple and wand-like or branched, i°-6° high, more or less hirsute-pubescent, rarely gla- brate. Leaves lanceolate to ovate-lanceo- late, acute or acuminate, narrowed and sessile at the base or the lowest petioled, repand-denticulate, i'-6'long; flowers open- ing in the evening, i'-2i' broad; calyx-tube slender, much longer than the ovary, the lobes linear, contiguous at the base, re- flexed; capsules oblong, narrowed above, erect, pubescent, i'-li' long, 2j"-3" thick, nearly terete, longer than the deciduous upper bracts. Usually in dry soil, Labrador to Florida, Minnesota, Arkansas and Texas. Large ram- Tree-primrose. Four-o-clock. Coffee- or fever-plant. King's-cure-all. Scurvish or scab- ish. June-Oct. Oenothera grandiflora Ait., of the Gulf States, is taller and has much larger flowers', up to 4' broad. Large-flowered races of the preceding species have been mistaken for Oenothera Lamarckiana Ser., a large-flowered plant, in some features intermediate between 0. biennis and O. grandiflora, not definitely known in the wild state, but frequently cultivated, apparently originated in Old World gardens over one hundred years ago. Oenothera muricata L. Northern Evening-Primrose. Fig. 3039. Oenothera muricata L. Syst. Ed. 12, 263. 1767- Similar to the preceding species, usually simple, 3° high or less, the stem puberulent and with longer hairs enlarged at the base. Leaves lanceo- late, mostly narrower than those of 0. biennis, entire, or slightly repand-denticulate; flowers i'-2' broad; capsules hirsute, narrowly oblong- cy


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913