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



2. E. COloratum, Muhl. Stem smoothish, much branched ; leaves mostly 

 opposite, lanceolate or ovate-lanceolate, denticulate ; raceme leafy ; flowers small, 

 reddish; petals 2-cleft ; stigma clavate; capsule downy. (E. tetragonum, Ph., 

 Ell.) Swamps in the upper districts, Mississippi to North Carolina, and north- 

 ward. August. Stem l-2 high. 



3. E. palustre, L., var. lineare, Gray. Stem pubescent, branching 

 above ; leaves linear, slightly denticulate, the lower ones opposite ; raceme 

 leafy ; flowers small, white or rose-color ; stigma clavate ; capsule hoary. 

 Mountains of North Carolina, and northward. August. Stem l-2 high. 



4. JUSSIJEA, L. 



Calyx-tube long, 4-angled or cylindrical, not prolonged beyond the ovary ; the 

 limb 4-6-lobed, persistent. Petals 4-6. Stamens 8-12. Capsule mostly 

 elongated, 4 - 6-celled, many-seeded, opening irregularly at the sides. Marsh 

 herbs, with alternate leaves, and axillary yellow flowers. 



1. J. leptocarpa, Nutt. Hairy; stem erect, at length much branched; 

 leaves lanceolate, acute ; flowers small ; calyx-lobes mostly 6, as long as the 

 petals ; capsule linear, cylindrical, much longer than the pedicel. Marshes, 

 Florida, and westward. June -Sept. (3) Stem 2 -5 high. Capsule 1^' 

 long, slightly curved. 



2. J. grandiflora, Michx. Hairy ; stem creeping at the base ; leaves 

 lanceolate, acute ; flowers large ; calyx-lobes 5, half as long as the petals ; ovary 

 (rarely maturing) rather shorter than the pedicel. Marshes, South Carolina, 

 and westward. May -August. 1J. Stem 2 -3 long. Flowers 2' in diam- 

 eter. Capsule cylindrical. 



3. J. decurrens, DC. Smooth ; stem erect, branched, wing-angled ; 

 leaves lanceolate, acute, sessile ; flowers nearly sessile ; calyx-lobes 4, nearly as 

 long as the petals ; stamens 8 ; capsule 4-angled, oblong-clavate. (Ludwigia 

 decurrens, Ell ) Ditches, &c., Florida to North Carolina, and westward. July - 

 Sept. Stem 6' - 3 high. 



5. LUDWIGIA, L. SEKD-BOX. 



Calyx-tube 4-angled or cylindrical, mostly short, not prolonged beyond the 

 ovary. Petals 4, roundish or obcordate, often wanting. Stamens 4. Style 

 short. Stigma capitate. Capsule variously dehiscent, 4-celled, many-seeded. 

 Perennial and mostly stoloniferous marsh herbs, with entire leaves, and yellow 

 flowers. 

 * Capsule cubical, indehiscent, discharging the seeds through a central pore of the 



convex disk : calyx-lobes deciduous : petals large : stamens and style slender : leaves 



alternate : Jlowers pedicelled. 



1. L. alternifolia, L. Smoothish; stem much branched ; leaves lanceo- 

 late, short-petipled, acute ; calyx-lobes spreading, about as long as the petals ; 

 capsule large, wing-angled. (L. macrocarpa, Michx.) Shady swamps, Florida 



