834 EPILOBIACEAE 
Stigma 2-lobed. Ovules 2 in each cavity. Fruit pendulous, 1-celled, leathery. Seed 
solitary, germinating in the persistent fruit, the elongating radicle sometimes reaching 
the ground before the fruit falls. Endosperm wanting. MANGROVE. 
1. Rhizophora Mángle L. A shrub or tree, reaching a height of 10 m., forming 
impenetrable thickets by the precocious and greatly elongating radicles of the embryo and 
the numerous roots. Leaves 5-15 cm. long; blades leathery, elliptic or elliptic-obovate, 
obtuse, with a stout midrib; petioles 0.5-1.5 cm. in length : peduncles 1-4 cm. long, 2-3- 
flowered: pedicels stout, 5-10 mm. long: bractlets scale-like: hypanthium fleshy, tur- 
binate or campanulate, 3-5 mm. long: sepals lanceolate, about 1 cm. long, involute, 
keeled within, very firm, recurved at maturity: petals pale yellow, leathery, linear or 
nearly so, cleft at the tip, involute above the middle, cobwebby along the edges : anthers 
clustered around the style : fruit 2-3 cm. long, curved, the radicle protruding asa narrowly 
clavate pendent body. 
Along the coast of peninsular Florida and the Keys. Also in tropical America. 
FAMILY 7. EPILOBIACEAE DC. EVvENING-PRIMROSE FAMILY. 
Herbs, or rarely shrubs. Leaves alternate or opposite, without stipules, or 
with mere glands in their place: blades simple. Flowers usually perfect. Hy- 
panthium often elongated. Calyx of 2-6, usually 4, sepals. Corolla of 2-9, 
usually 4, petals, convolute in the bud, or rarely wanting. Androecium of as 
many stamens as the sepals or twice as many. Gynoecium of several, usually 
4, united carpels. Ovary 1-6-celled, usually 4-celled, inferior. Styles united. 
Stigmas distinct, or united, and capitate or discoid. Ovules generally anat- 
ropous. Fruit capsular or rarely nut-like. Seeds sometimes appendaged, the 
appendage either tubercle-like or a tuft of hairs. Endosperm scant or wanting. 
[Onagraceae Dumort. ] 
Floral whorls of 4 parts or more. 
Fruit a many-seeded capsule, esu by valves or by a pore, or by the breaking down of the walls. 
Hypanthium not prolonged beyond the ovary. 
Seeds naked, i. e., without a tuft of hairs. 
Stamens 4, in 1 row. 
Leaves opposite: stems prostrate, creeping or floating: flowers sessile or on peduncles 
longer than the leaves. : 
Flowers sessile: petals wanting or very small : leaf-blades petioled : capsules sessile, 
short, flat at the apex. 1, ISNARDIA. 
Flowers long-peduncled : pose conspicuous : leaf-blades sessile: 
capsule long-peduncled, elongated, eurved, with a promi- 
nent 4-lobed stylopodium at the apex. 2. LUDWIGIANTHA. 
Leaves alternate: stems erect or ascending : flowers sessile, the hy- 
anthium and ovary sometimes narrowed into a pedicel-like 
ase. 3. LUDWIGIA. 
Stamens 8-12 in 2 rows. 4. JUSSIAEA. 
Seeds furnished with a tuft of silky hairs. 5. CHAMAENERION. 
Hypanthium prolonged beyond the ovary. 
Seeds with a tuft of silky hairs. 6. EPILOBIUM. 
Seeds naked or merely tuberculate. ; 
Stigmas 4, linear. 
Flowers with all the stamens equal in length. 1 
Ovules and seeds horizontal, borne in 2 or rarely more rows, pris- 
matic-angled. : 7. ONAGRA. 
Ovules and seeds ascending, not angled. 
Buds erect : corolla yellow : ovules and seeds in 2 rows. 8. OENOTHERA. 
Buds drooping : corolla white turning pink : ovules and seeds 
in 1 row. 9. ANOGRA. 
Flowers with the alternate stamens longer. 
dura and nen numerous, not tuberculate, clustered on slender 
uniculi. 
Corolla yellow: capsules depressed at the apex. 10. KNEIFFIA. 
Corolla red, purple or white: capsules pointed. 11. HARTMANNIA. 
Ovules and seeds few, sessile in 1 or 2 rows. 
Plants normally acaulescent. 12. LAVAUXIA. 
vers rere 4-angled diffuse :1 0.5- 
apsules shar -an : stems wiry, diffuse : leaves 0. 
2.5 om. long. — ^ Ex 13. GAURELLA. 
Capsules b -W : n ffused, stout : leaves a 
: re Shea ig wr 14. MEGAPTERIUM. 
Lu er Su Me. evum ar ne À ron x h MU 
ree portion of the nthium longer than the ovary : stigm 
entire : stamens oxen in length. id 15. GALPINSIA. 
Free portion of the hypanthium shorter than the ovary: stigma x 
E slightly 4-toothed : stamens unequal in length. . 16. MERIOLIX. 
and MEUS. Po tert 17. GAURA 
aments each with a scale at the base : ovary 4-celled. . af 
Filaments naked : ovary 1-eelled. d 18. STENOSIPHON. 
Floral whorls of 2 parts. 19. CIRCAEA. 
