356 Order 52.— ONAGRACBjE. 



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

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

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

 (Isnardia DC.) 



10 L. polycdrpa Short & Peter. Glabrous, erreci, much branched, and often 

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

 axillary, solitary, with 2 subulate braotlets at base ; caps, i-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. microodrpa ilx. Glabrous; si. creeping at lose, then ascending; hf. 

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

 VaGvery small, obovate capsule; stig. sessile. — Wet grounds, S. Car. to Fla. St. 

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

 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 the apex ; fls. sessile, crowded 

 in a terminal bracied head or spike ; cal. lobes shorter than the 4-angled capsule. 

 — rS. Car. to Fla. Sts. 2 to 3f high, -simple, or with few virgate branches. Lvi5. 

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



13 Ii. palilstris Ell. Water Purslain. I^-ostraie and creeping, smooth, and 

 .slightly succulent ; Its. opposite, ovate-.spatulate, acute, tapering at base into .'4 

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

 abrupt at both ends, with 4 groen angles ; Iracilets 0. — In U. S. and Can., creeping 

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

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



14 L. natans EU. Creeping or floating, smooth and slightly succulent ; lvs. ob- 

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

 lar-ovate, acute, as long as the yellow petak ; ova. with 2 conspicuotts bracteolcs ; 

 fr. 4-angled, tapering to the base. — Swamps, S. States. Caps, abo'ib 4" long, ;.t 

 first top-shaped. Jl. — Oct. 



15 Ii. spatuldta Torr. &, Gr. Branched, ascending, dcwny ar^d not succvhnt; 

 lvs. oval, tapering to a petiole ; fis. very small, apetalous, sessile ; caps, pubescent, 

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

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



16 Ii. aroudta Walt. Nearly smooth, creeping ; lvs. oblanceolato, tapering to 

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

 than the lvs. ; petals bright yellow, longer than the lanoe-linear, spreading sepals ; 

 caps, clavate, finally arcuate, as long as tlie persistent calyx lobes. — Swanvps, 

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

 May — Jl. (Isnardia pedunoulosa DO.) 



8. CIRC^^A, L. Enchanter's Nightshade. ( Cirrs was supposed 

 to have used those plants in her enchantments.) Calyx slightly prc- 

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

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

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



1 C. LutetiSna L. St. erect, pubescent above ; lvs. ovate, suboordate, acuminate, 

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

 llcxed, hispid-uncinate. — Damp shades and thickets, Can. to Car. W. to lU. St 

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

 iM- slightly pubescent, 2 to 4' long, J as wide; petiole 8 to 15" long. Fls. small, 

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

 hooks. Jn., Jl. 



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

 Iranous, dentate, as long as the petioles; bracts set<weous; 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. Lva. 



