Genus 3. 



EVENING-PRIMROSE FAMILY. 



5S7 



2. Ludwigia polycarpa Short & Peter. 

 Alaiiy-fruited Ludwigia. Fig. 3017. 



Liid-cigia I'olycarfa Short. & Peter, Translv. Journ. 

 Med. 8: 581. i8j5. 



Erect, glabrous, branching, i-3 high, pro- 

 ducing stolons from the base. Leaves alternate, 

 sessile, narrowly lanceolate, acute at each end, 

 2'-4' long, rough-margined, those of the stolons 

 troader and spatulate ; bractlets at base of the 

 calyx linear, ih"-2" long, usually persistent; 

 flowers sessile, about li" broad, greenish; calyx- 

 lobes triangular-lanceolate, acute, sometimes 

 finely serrulate ; petals minute, greenish ; capsule 

 glabrous, somewhat top-shaped but slightly 

 4-sided, about ai" high, often twice the length 

 of the calyx-lobes, glabrous, at lenght dehiscent. 



In swamps, Connecticut to Ontario, Minnesota, 

 Tennessee, Nebraska and Kansas. July-Oct, False 

 loosestrife. 



3. Ludwigia glandulosa W'alt. Cylindric-fruited Ludwigia. Fig. 3018. 



Liuhfigia glandulosa Walt. Fl. Car. 8S. 1788. 

 Jussiaea hrachycarpa Lam. Encycl. 3: 331. 1789. 

 L. cylindrica Ell. Bot. S. C. & Ga. 1:213. 1817. 



Erect, glabrous, much branched, l-3 high. 

 Leaves alternate, sessile or narrowed into a 

 short petiole, oblong-lanceolate, acute at each 

 end, 2'-4' long; flowers axillary, solitary, or 

 rarely 2 together, greenish, about i" broad; 

 bractlets at base of calyx minute or none ; 

 calyx-lobes triangular-ovate, acute ; petals 

 none ; capsule cylindric, 4-grooved, 3"-4" long, 

 glabrous, 4-5 times as long as the calyx-lobes, 

 at length dehiscent. 



In swamps, Virginia to southern Illinois. Mis- 

 souri, Arkansas, Florida and Texas. July-Sept. 



4. Ludwigia alata Ell. \\^ing-stemmed Lud- 

 wigia. Fig. 3019. 



Ludwigia alata Ell. Bot. S. C. & Ga. i : 212. 1817. 



Perennial, slender, glabrous. Stems erect, l-3 

 tall, simple or branched, winged, often stolonifer- 

 ous ; leaves linear-oblanceolate to linear-lanceolate, 

 or sometiines nearly hnear, l'-4' long, acute or 

 acutish, sessile or short-petioled, those of the sto- 

 lons suborbicular or spatulate; flowers inconspicu- 

 ous, about 2" broad, white or greenish ; spikes 2'-i2' 

 long; calyx glabrous, its tube turbinate, its segments 

 triangular-ovate, acute or acuminate ; petals none ; 

 capsules broadly obpyramidal, 1V-2" high, sessile, 

 llie angles winged; seeds oval in outline, about i" 

 long, faintly pitted. 



In marshes. North Carolina to Florida. Recorded 

 from Missouri and Louisiana. June-Sept. 



