9. E. Hornemánni, Reichenb. Glabrate, 8--18´ high; leaves mostly horizontal, ovate, the upper acutish, remotely denticulate, abruptly contracted to winged petioles, not revolute; seeds often only slightly roughened, short and shortly appendaged. (E. alpinum, _Man._)--White Mts., dells of the Wisconsin River (_Lapham_), and northward. (Eu.) 10. E. palústre, L. Slender, 1° high or less, often branched, finely pubescent; leaves erect or ascending, about equalling or longer than the internodes, sessile, linear to linear-lanceolate or elliptic-oblong, obtuse, with revolute margins; capsules pubescent to nearly glabrous, mostly shorter than the slender peduncles; seeds fusiform, with long beak. (E. palustre, var. lineare, _Man._, in part.)--Penn. to Minn. and the White Mts., north and westward. (Eu.) 4. ŒNOTHÈRA, L. EVENING PRIMROSE. Calyx-tube prolonged beyond the ovary, deciduous; the lobes 4, reflexed. Petals 4. Stamens 8; anthers mostly linear and versatile. Capsule 4-valved, many-seeded. Seeds naked.--Leaves alternate. Flowers yellow, white or rose-color. (An old name, of unknown meaning, for a species of Epilobium.) § 1. _Stigma-lobes linear, elongated (except in n. 7); calyx-tube linear, slightly dilated at the throat; anthers linear._ [*] _Caulescent annuals or biennials; flowers erect in the bud, nocturnal, yellow, the calyx-tips free; capsules sessile, coriaceous; seeds in two rows in each cell._ [+] _Flowers in a leafy spike; capsules stout, oblong, slightly narrowed above._ 1. Œ. biénnis, L. (COMMON EVENING PRIMROSE.) Rather stout, erect (1--5° high), usually simple, more or less pubescent and hairy; leaves lanceolate to oblong- or rarely ovate-lanceolate (2--6´ long), acute or acuminate, repandly denticulate, the lowest petioled; calyx-tube 1--2½´ long, the tips of the sepals contiguous; petals ½--¾´ long; capsule more or less pubescent or hirsute.--Throughout the U. S.--Var. CRUCIÀTA, Torr. & Gray, with small narrow petals, appears to be merely a rare garden (?) sport. E. Mass. Var. grandiflòra, Lindl., has petals as long as the calyx-tube (1--2½´ long).--Same range as the type, but not so common east. 2. Œ. Oakesiàna, Robbins. Annual, more slender, not hairy, the puberulence mainly appressed; calyx-tips not contiguous at base; otherwise nearly as in the typical form of the last. (Œ. biennis, var. Oakesiana, _Gray._)--Dry places, E. Mass., R. I., and Conn. [+][+] _Flowers in a leafy spike or axillary; capsules linear._ 3. Œ. rhombipétala, Nutt. Rarely branching, appressed-puberulent and subcanescent; leaves narrowly lanceolate, acuminate, denticulate, the lowest attenuate to a petiole and rarely pinnatifid, diminishing upward into the close, elongated, conspicuously bracted spike; calyx silky-canescent (tube 1½´ long); petals rhombic-ovate (6--10´ long).--Ind. to Minn. and Ark.