113 
4. L. album HBK. Leaves linear, or the cauline ones linear-lanceolate: the 
fleshy hy pogynous ring very small. (ZL. alatum, vars. linearifolium and lanceolatum 
Gray.) 
ONAGRARIEZ. (EVENING-PRIMROSE FAMILY.) 
Herbs, with usually 4-merous perfect and symmetrical flowers, oppo- 
Site or alternate leaves, mostly no stipules, calyx-tube cohering with 
the 2 to 4-celled Ovary, petals convolute in bud (sometimes wanting), 
Stamens as many or twice as many as the petals or calyx-lobes and 
inserted on the summit of the calyx-tube, a single slender Style and a 
2 to 4-lobed or capitate stigma. 
* Fruit a many-seeded usually loculicidal pod. 
+ Calyx-limb divided to the summit of the Ovary, persistent. 
1. Jussiza. Petals 4 to 6: stamens twice as many: capsule elongated. 
2, Ludwigia. Petals 4 or none: stamens 4; capsule short. 
+ + Calyx-tube prolonged beyond the ovary (but slightly so in No. 3) and deciduous 
from it: flowers 4-merous, 
3. Epilobium. Seeds silky-tufted: flowers small, not yellow: lower leaves often 
opposite. 
4. GGnothera. Seeds naked: flowers mostly yellow: leaves alternate. 
* * Fruit dry and indehiscent, 1 to 4-seeded : leaves alternate, 
5. Gaura, Calyx-tube obconical: filaments appendaged at base, 
6. Stenosiphon. Calyx-tube filiform: filaments not appendaged. 
1. JUSSIZA L. 
Herbs, with mostly entire and alternate leaves, axillary yellow flowers, 
elongated calyx-tube not at all prolonged beyond the ovary and with 4 
to 6 persistent herbaceous lobes, 4 to 6 petals, twice as many stamens, 
and a long 4 to 6-celled capsule opening between the ribs. 
1. J. repens L. Stem creeping, or floating and rooting: leaves oblong, tapering 
intoa slender petiole: flowers large, long-peduncled: calyx-lobes and obovate petals 
5: pod woody, cylindrical, with a tapering base.—In streams, from the San Antonio 
northward and eastward. 
2. LUDWIGIA L. (I'atse LOOSESTRIFE. ) 
Perennial herbs, with alternate or opposite leaves, axillary flowers, 
calyx-tube not at all prolonged beyond the ovary and with 4 usually 
persistent lobes, 4 petals (often small or wanting), 4 stamens, and a 
short or cylindrical many-seeded capsule, 
1. L. palustris El. (WATER-PURSLANE.) Sinooth, the stems creeping or floating: 
leaves all opposite, ovate or oval, tapering into a slender petiole: petals none, or 
small] and reddish when the plant grows out of water: calyx-lobes very short: cap- 
sules oblong, 4-sided, not tapering at base, 4 mm. long, sessile in the axils.—A ppar- 
ently throughout eastern and southern Texas and beyond the Pecos, 
2. L. natans Ell. Like the last, but with larger flowérs, yellow petals (or none), 
and a much larger conspicuously bibracteolate capsule whichis attenuate from the 
middle to the base, turbinate when young, at length 4-sided.—A species of the Gulf 
States and extending through central and southern Texas to beyond the Pecos. 
23204—vol. 2, No. 1 8 
