138 ONAGRACEiE. (EVENING PRIMROSE FAMILY.) 
4. Pod short or cylindrical, many-seeded. Seeds minute, naked. 
— Perennial: flowers axillary. (Named in honor of Ludwig , 
Professor of Botany at Leipsic, contemporary with Linnaeus.) 
* Leaves alternate , sessile: flowers peduncled : petals large, yellow. 
1. L• altcmifdlia, L. (Seed-box.) Smooth or nearly so, 
branched; leaves lanceolate, acute or pointed at both ends ; petals 
scarcely as long as the ovate-lanceolate pointed calyx-lobes ; pods 
cubical, rounded at the base, wing-angled. — Swamps, chiefly south¬ 
ward or near the coast. Aug. — Plant 3? high. Pods opening first 
by a hole at the end where the style falls off, afterwards splitting in 
pieces. 
2. 1*. hirtella, Raf. (Hairy Seed-box ) Hairy all over; 
stems nearly simple; leaves ovate-oblong, or the upper lanceolate, 
blunt at both ends ; petals rather longer than the lance-ovate calyx- 
lobes ; pods slightly wing-angled, shaped nearly as in the last. — Moist 
pine barrens. New Jersey and southward: not common. June- 
September. 
* * Leaves alternate , sessile : flowers sessile : petals minute or none. 
3. 1.. spliaerocarpa, Ell. Nearly smooth, much branched; 
leaves lanceolate, acute, tapering at the base; flowers solitary, tcithout 
bractlets ; petals mostly wanting ; pods globular , not longer than the 
calyx-lobes, very small. — Wet swamps, Massachusetts (Tewksbury, 
Greene ), New York (Peekskill, R. I. Brovme), and New Jersey; 
thence southward. 
4. L. polycurpa, Short & Peter. Smooth, much branched, 
leaves narrowly lanceolate, acute at both ends; flowers often clustered 
in the axils, without petals; bractlets on the base of the 4-sided top¬ 
shaped pod, which is longer than the calyx-lobes. — Swamps from 
Michigan southward. Aug.— Stem l°-3? high, sometimes with 
runners. 
5. Ij. linearis, Walt. Smooth, low and slender, often branch¬ 
ed, with narrow lanceolate or linear leaves; bearing short runners 
with obovate leaves; flowers solitary, usually with {greenish-yellow ) 
petals ; bractlets minute ; pods elongated top-shaped, 4-sided, much lon¬ 
ger than the calyx. — Bogs, pine barrens of New Jersey and south¬ 
ward. Aug. 
* * * Leaves opposite, petioled: flowers sessile, solitary: petals none 
or small. (Isn&rdia, L.) 
6. li. pal list ris. Ell. (Water Purslane.) Smooth, low; 
stems procumbent at the base, rooting or floating; leaves ovate or 
oval, tapering into a slender petiole; calyx-lobes very short; pod® 
oblong, 4-sided, not tapering at the base. (Isnardia palustris, L ) 
Ditches, common, July — Oct. — Petals rarely present, small and red 
dish when the plant grows out of water. 
