188 ONAGRACE^. (EVENING-PRIMROSE FAMILY.) 



bractlets minute, obsolete, or none ; capsules globular or depressed (sometimes 

 acute at base), uot louger than the calyx lobes (less than 2" long). — Water or 

 wet swamps, E. Mass. to Fla. and La. Bark below often spongv-thickened. 



4. L. polyearpa, Short & Peter, Leaves narrowly lanceolate, acute at 

 both ends, those of the runners oblong-spatulate, acute, entire ; bra diets Imear- 

 awl-shaped and conspicuous on the base of the 4-sided somewhat top-shaped cap- 

 sule, which is longer than the calyx-lobes. — Wet places, E. Mass. and Conn, 

 to Mich., Minn., E. Kan., and Ky. 



5. Ij. linearis, Walt. Slender, mostly low ; leaves narroAvly linear, those 

 of the short runners obovate ; minute petals usually present ; bractlets minute at 

 the base of the elongated top-shaped 4-sided capsule, which is 3" long and much 

 longer than the calyx-lobes. — Bogs, pine barrens of N. J., and southward. 



6. L. cylindrica, Ell. Much branched; leaves oblong- or spatulate- 

 lanceolate, much tapering at the base or even petioled ; bractlets very minitfe at 

 the base of the ci/lindrical capsule, which is 3" long, and several times exceeds 

 the calyx-lobes. — Swamps, S. 111. to Fla. and Tex. 



* * Leaves all opposite; stems creeping or floating. 



7. L. pallistris, Ell. (Water Purslane.) Smooth ; leaves ovate or 

 oval, tapering into a slender petiole ; petals none, or small and reddish when 

 the plant grows out of water ; calyx-lobes very short ; capsules oblong, 4-sided, 

 not tapering at base, sessile in the axils (2" long). — Ditches, common. (Eu.) 



8. L. arcukta, Walt. Smooth, small and creeping ; leaves oblanceolate, 

 nearly sessile ; flowers solitary, long-peduucled ; petals yellow, exceeding the 

 calyx (3" long); capsules oblong-club-shaped, somewhat curved (J' long). — 

 Swamps, Va. to Fla. 



3. EPILOBIUM, L. Willow-herb. 



Calyx-tube not or scarcely prolonged beyond the ovary ; the limb 4-cleft 

 or -parted, deciduous. Petals 4. Stamens 8 ; anthers short. Capsule linear, 

 many-seeded. Seeds with a tuft of long hairs at the end. — Mostly perennials, 

 with nearly sessile leaves, and violet, purple, or white flowers ; in summer. A 

 large genus, many of its species of difficult limitation. The following provi- 

 sional arrangement has been made by Prof. W. Tre lease, mainly in accord- 

 ance with Haussknecht's revision of the genus. (Name composed of iiri, upon, 

 and Kbfiiov, a little pod.) 



§ 1. Flowers large, purple, in a long raceme; calyx-limb deeply parted ; petals 

 entire; stamens and style successively deflexed ; stigma of 4 long lobes. 



1. E. angustifolium, L. (Great Willow-herb. Fire-weed.) Stem 

 simple, tall (4-7°) ; leaves scattered, ample, lanceolate, nearly entire. — Low 

 grounds, especially in newly cleared lands ; N. Eng. to N. C, west to Minn, 

 and E. Kan., and far north and westward. (Eu., Asia.) 



§ 2. Flowers mostly small and corymbed or panicled ; calyx-limb 4-cleft; petals 



mostly deeply notched ; stamens and style erect. 



* Stigma 4-parted ; stem terete. 



E. HiRStJTUM, L. Densely soft-hairy, stout, branching (3 - .5° high) ; leaves 

 mostly opposite, lance-oblong, serrulate, sessile , flowers in the upper axils or 



