478 ONAGRACEAE. (Vor. II. 
2. Ludwigia polycarpa Short & Peter. Many-fruited Ludwigia. (Fig. 2558.) 
Ludwigia polycarpa Short. & Peter, Translv. 
Journ. Med. 8: 581. 1835. 
Erect, glabrous, branching, 1°-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 
broader and spatulate; bractlets at base of the 
calyx linear, 114//-2/’ long, usually persistent; 
flowers sessile, about 14’ broad, greenish; 
calyx-lobes triangular-lanceolate, acute, some- 
times finely serrulate; petals minute, greenish; 
capsule glabrous, somewhat top-shaped but 
slightly 4-sided, about 24%4’’ high, often twice 
the length of the calyx-lobes, glabrous, at 
length dehiscent. 
In swamps, Ontario to Massachusetts and Min- 
nesota, south to Kentucky and Nebraska. July- 
Oct. 
3. Ludwigia glandulosa Walt. Cylindric-fruited Ludwigia. (Fig. 2559.) 
Ludwigia glandulosa Walt. F\. Car. 88. 1788. 
Jussiaea brachycarpa Yam. Encycl. 3: 331: 
pubifeia cylindrica Ell. Bot. S. C. & Ga. 1: 
213. 1817. 
Erect, glabrous, much branched, 1°-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 
1’’ 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, southern Illinois and Missouri to 
Texas, east to Florida and South Carolina. 
July-Sept. 
4. Ludwigia alata Ell. Wing-stemmed 
Ludwigia. (Fig. 2560.) 
Ludwigia alaia Ell. Bot. S. C. & Ga. 1: 212. 1817. 
Perennial, slender, glabrous. Stems erect, 1°-3° 
tall, simple or branched, winged, often stolonifer- 
ous; leaves linear-oblanceolate to linear-lanceolate, 
or sometimes nearly linear, 1/-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/— 
12’ long; calyx glabrous, its tube turbinate, its seg- 
ments triangular-ovate, acute or acuminate; petals 
none; capsules broadly obpyramidal, 1%4’/-2’’ high, 
sessile, the angles winged; seeds oval in outline, 
about 44’ long, faintly pitted. 
In marshes, North Carolina to Missouri, south to 
Florida and Louisiana. June-Sept. 
