188 ONAGRACE^E. (EVENING-PRIMROSE FAMILY.) 



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

 acute at base), not longer than the calyx-lobes (less than 2" long). Water or 

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



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

 both ends, those of the runners oblong-spatulate, acute, entire ; bractlets linear- 

 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. L. linearis, Walt. Slender, mostly low ; leaves narrowly 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- 

 lauceolate, much tapering at the base or even petioled ; bractlets very minute at 

 the base of the cylindrical capsule, which is 3" long, and several times exceeds 

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



* * Leaves all opposite ; steins creeping or floating. 



7. L. palustris, 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. arcuata, Walt. Smooth, small and creeping ; leaves oblauceolate, 

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

 calyx (3" long) ; capsules oblong-club-shaped, somewhat curved (' 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 nearlv 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. TRELEASE, mainly in accord- 

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

 and \jfiiov, 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 paniclcd ; calyx-limb 4-cleft; petals 

 mostly deeply notched ; stamens and style erect. 



* Stigma 4-parted ; stem terete. 



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

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



