356 Order 52.— ONAGRACE2E. 



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

 St. 2 to 3f high, branching, angular. Margin of the lvs. 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 ; lvs. lance-linear, gradually acute at each end; fls. apetalous, 

 axillary, solitary, with 2 subulate bractlets at base ; caps. 4-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; lvs. 

 spatulale-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 ian- 

 ceolata DC.) 



12 L. capitata Mx. Glabrous, erect, slender; lvs. lance-linear or lance-oblong, 

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

 in a terminal bracted head or spike ; cal. lobes shorter than the 4-angled 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. paliistris Ell. "Water Purslain. Prostrate and creeping, smooth, and 

 slightly succulent ; lvs. 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. Creeping or floating, smooth and slightly succulent; lvs. 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 bracteoles ; 

 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 ; 

 lvs. oval, tapering to a petiolo ; fls. very small, apetalous, sessile ; caps, pubescent, 

 ovate, somewhat 4-sided, small. — 21 Middle Fla. Plant near If high, diffusely 

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



16 It. arcuata Walt. Nearly smooth, creeping ; lvs. oblanceolate, tapering to 

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

 them the lvs. ; 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. (Isnardia pedunculosa DC.) 



8. CIRC/E 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, obcordate ; 

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

 pubescent, 2-celled, 2-seeded ; styles united. — U Lvs. opposite. 



1 C. Lutetiana L. St. erect, pubescent above ; lvs. 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 IlL St 

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

 or slightly pubescent, 2 to 4' long, £ as wide; petiole 8 to 15" long. Fls. 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; lvs. broad-cordate, mem- 

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

 A Bmall, 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. Lvi. 



