366 ORDER 52. ONAGRACE^E. 



water, S. to Ga., partly submerged, or in very wet grounds, near Boston, Mass. 

 St. 2 to 3f high, branching, angular. Margin of the Ivs. rough, sometimes re- 

 motely and obscurely denticulate. Fls. greenish, inconspicuous. Jl. Sept. 

 (Isnardia DC.) 



10 L. polycarpa Short & Peter. Glabrous, erect, much branched, and often 

 stoloniferous; Ivs. lance-linear, gradually acute at each end; Us. apetalous. 

 axillary, solitary, with 2 subulate bractlets at base ; caps, ^-angled, truncated 

 above, tapering below, crowned with the 4-lobed stylopodium. Swamps, W. 

 States. St. 1 to 3f high. Lvs. 2 to 3' by 2 to 4", ten times longer than the 

 flowers. Aug. Oct. 



11 L. microcarpa MX. Glabrous; st. creeping at base, then ascending; Ivs. 

 spatulate-obovate, minutely denticulate; cal. lobes roundish, acuminate, larger than 

 the very small, obovate capsule ; stig. sessile. Wet grounds, S. Car. to Fla. St. 

 mostly simple, If high, often with stolons at base. Jl. Sept. (Isnardia lan- 

 ceolata DC.) 



12 L. capitata MX. Glabrous, erect, slender ; Ivs. lance-linear or lance-oblong, 

 obtuse at the sessile base, obtuse or very acute at the apex ; fls. sessile, crowded 

 in a terminal bracted head or spike : cal. lobes shorter than the 4-augled capsule. 

 S. Car. to Fla. Sts. 2 to 3f high, simple, or with few virgate branches. Lvs. 

 1 to 3' long, the upper linear and taper-pointed. Aug. Oct. (Isnardia DC.) 



13 L. palustris Ell. WATER PURSLANE. Prostrate and creeping, smooth, and 

 slightly succulent ; Ivs. opposite, ovate-spatulate, acute, tapering at base into a 

 petiole ; fls. sessile, solitary ; pet. 0, or very small, flesh color ; caps, oblong, 

 abrupt at both ends, with 4 green angles ; bractlets 0. In U. S. and Can., creeping 

 in muddy places or floating in water. St. round, reddish, 10 to 18' long. Cal. 

 lobes and sty. very short. Caps. 2" long. Jn. Sept. (Isnardia L.) 



14 L. natans Ell. Cretping or floating, smooth and slightly succulent; Ivs. ob- 

 long, tapering to a petiole, or the lower subsessile ; fls. sessile ; cal. lobes triangu- 

 lar-ovate, acute, as long as the yellow petals; ova. with 2 conspicuous bracteoks; 

 fr. 4-angled, tapering to the base. Swamps, S. States. Caps, about 4" long, at 

 first top-shaped. Jl. Oct. 



15 L. spatulata Torr. & Gr. Branched, ascending, downy and not succulent; 

 Ivs. oval, tapering to a petiole ; fli. very small, apetalous, sessile ; caps, pubescent, 

 ovate, somewhat 4-:-ided, small. 2f Middle Fla, Plant near If high, diffusely 

 branched from the base. Lvs. and margined petiole about 2' long. 



16 L. arcuata Walt. Nearly smooth, creeping; Iva oblanceolate, tapering to 

 the sessile base ; fls. solitary, on a slender axillary peduncle, which is twice longer 

 than the Ivs. ; petals bright yellow, longer than the lance-linear, spreading sepals: 

 caps, clavate, finally arcuate, as long as the persistent calyx lobes. Swamps, 

 Va. to Fla., along the coast. Sts. 3 to 10' long. Lvs. 10" long. Fls. 10" broad. 



: May Jl. (Isnardiu pedunculosa DC.) 



8. CIRC V A, L. ENCHANTER'S NIGHTSHADE. (Circe was supposed 

 to have used these plants in her enchantments.) Calyx slightly pro- 

 duced above the ovary, deciduous, limb 2-parted ; petals 2, obcordatc ; 

 stamens 2, opposite the sepals; capsule obovoid, uncinate-hispid or 

 pubescent, 2-cellcd, 2-seeded ; styles united. 14 Lvs. opposite. 



1 C. Lutetiana L. St. erect, pubescent above ; Ivs. ovate, subcordate, acuminate, 

 slightly repand-dentate, opaque., longer than the petioles; bracts none; fr. re- 

 flexed, hispid-uncinate. Damp shades and thickets, Can. to Car. W. to I'd. St. 

 1 to 2f high, sparingly branched, tumid at the nodes. Lvs. dark green, smooth 

 or slightly pubescent, 2 to 4' long, i as wide ; petiole 8 to 15" long. Fis. small, 

 rose color, in long, terminal, axillary racemes. Fr. obcordate, with conspicuous 

 hooks. Jn., Jl. 



2 C. alpina L. Smooth; st ascending at base, weak; Ivs. broad-cordate, mem- 

 - branous, dentate, as long as the petioles; bracts setaceous; caps, pubescent. 

 ' A small, delicate plant, common in wet, rocky woodlands, in mountainous dis- 

 tricts, N. Eng.. Brit. Am., W. to Or. St. diaphanous, juicy, 5 to 10' high. Lvs. 



