142 ONAGRACE.1;. (KVENING-nUMROSE FAMILY.) 



9. Ii. capitata, Miclix. Rmootli ; stem mostly simple, slender, angled 

 above ; leaves louy, laneeolate, acute, sessile, tlie lowest ones broader and ob- 

 tuse ; flowers in a eonipact oblong or ovate head, the lower ones sometimes 

 scatteR'd ; petals minute, mostly wanting ; capsule obtusely 4-angled, somewhat 

 narrower at the base, longer than the calyx -lobes. — Wet pine barrens, Florida 

 to North Carolina. July and August. — Stem 2° - 3° high. 



10. L. lanceolata, Ell. ? Smooth ; stem stout, terete, at length mu( h 

 branched ; leaves lanceolate, sessile ; flowers very numerous, in all the axils, 

 green ; petals none ; capsule cubical, with the sides flat and the angles mar- 

 gined, twice as long as the calyx-lobes; seeds cylindrical. — Ponds and swamps 

 in the pine barrens, Florida and Georgia. July -Sept. — Stem l°-2° Ligl.. 

 Flowers small. 



11. L. alata, Ell. Smooth; stem slender, simple or sparingly bran(he<l 

 near the summit, strongly angled ; leaves cuneate-luneeolate, obscurely denticu- 

 late; flowers few, near the summit of the branches, white ; petals none ; capsule 

 cubic-obconical, ■with concave sides and winged angles, as long as the calyx- 

 lobes ; seeds ovoid. — Brackish marshes, Florida to North Carolina, and west- 

 ward. July and August. — Stem 2° - 3° high. 



12. L. micl'OCarpa, ^liehx. Smooth; stem low, crecjnng at the base, 

 3-angled, mostly simple ; leaves spatulate-obovate ; jtetals none ; capsule mi- 

 nute, cubic-obconical, shorter than the calyx-lobes. — Muddy places, Florida to 

 North Carolina, and westward. July and August. — Stem C- 12' high. Cap- 

 sule scarcely larger than a pin's head. 



* * * Stems creeping : leaves opposite. 

 •t- Petals none. 



13. L. palustris, I'lll- Smooth ; stems diffuse ; leaves obovate, tapering 

 into a long petiole ; capsule oblong or obconical, oiiscurely 4-sided, longer than 

 the calyx-lobes. — Ditches and muddy places, common. June- Sept. — Stems 

 6'- 12' long. 



14. L. spathulata, Ton-. & Gray. Pubescent and somewliat hoarj- ; 

 leaves sjiatulate-ohovato ; capsule ovoid ; otherwise like the j)reeeding. — Mar- 

 gins of pine-barren ponds, ^Middle Florida. Jufy and August. 



4- -1- Petals 4. 



15. L. natans, Ell. Smooth; stems diflusc ; leaves obovate, ncutish, ta- 

 ])ering into a long ])Ctiolc ; flowers short-pedicelled ; petals roundish, as long as 

 the lobes of the calyx ; capsule ol)tuseIy 4-angled, narrowed at the ba.so. — 

 Marshes and margins of streams, Florida to North Carolina, and westward. 

 July- Sept. — ]{esenii)les No. 13, but is every way larger. 



IC. L. arcuata, AValt. Smooth; leaves laneeolate, narrowed at the base, 

 acute ; flowers on ])edun<les usually longer than the leaves, 2-bracted at the 

 base ; calyx-lobes linear-lanceolate, shorter than the obovate jx'tals ; cnpsulc cla- 

 vatc, curved. — Muddy margins of ponds, Hn:., Florida to North Carolina. July. 

 — Stems 4' - 8' long. 



