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



9. L. capitata, Michx. Smooth; stem mostly simple, slender, angled 

 above ; leaves long, lanceolate, acute, sessile, the lowest ones broader and ob- 

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

 scattered ; 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 much 

 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 high. 

 Flowers small. 



11. L. alata, Ell. Smooth; stem slender, simple or sparingly branched 

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

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

 cnbic-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. microcarpa, Michx. Smooth; stem low, creeping at the base, 

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

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

 North Carolina, and westward. July and August. Stem 6' - 12' high. Cap- 

 sule scarcely larger than a pin's head. 



* * * Stems creeping : leaves opposite. 

 >- Petals none. 



13. L. palustris, Ell. Smooth ; stems diffuse ; leaves obovate, tapering 

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

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

 C'-12' long. 



14. L. spathulata, Torr. & Gray. Pubescent and somewhat hoary ; 

 leaves spatulate-obovate ; capsule ovoid ; otherwise like the preceding. Mar- 

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



H- *- Petals 4. 



15. L. natans, E!I. Smooth; stems diffuse; leaves obovate, acutish, ta- 

 pering into a long petiole ; flowers short-pedicel led ; petals roundish, as long as 

 the lobes of the calyx ; capsule obtusely 4-anglcd, narrowed at the base. 

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

 July -Sept. Resembles No. 13, but is every way larger. 



16. L. arcuata, Walt. Smooth; leaves lanceolate, narrowed at the base, 

 acute ; flowers on peduncles usually longer than the leaves, 2-bracted at the 

 base ; .calyx-lobes linear-lanceolate, shorter than the obovate petals ; capsule cla- 

 vate, curved. Muddy margins of ponds, c., Florida to North Carolina. July. 

 Stems 4' - 8' long. 



