388 177- RHIZOPHORACEAE 



Ovary half-inferior. Receptacle slightly concave, saucer-shaped, scarcely 

 prolonged above the ovary. Petals 4 — 6. Calyx at the base of the fruit. 

 Seeds germinating in the still attached fruit. Plants with aerial roots. 

 Flowers with an involucre of two bracteoles, arranged in cymes. . , 6 



5. Receptacle funnel-shaped, prolonged above the ovary into a long tube. 



Flowers 8 — 14-merous. Petals red or brown, 2-]()bed, with thread-like 

 appendages. Antesepalous stamens curved sideways at the base, 

 becoming opposite to the antepetalous. Disc obscurely lobed. Ovary 

 2 — 4-celled. Seeds germinating in the still attaclied fruit. Flowers 

 solitary. — Species i. Tropical and South-east .\fri( a. Yields timber 

 and bark used for tanning and dyeing Bruguiera I. am. 



Receptacle bell-shaped, prolonged above the ovary into a short tul)e. 

 Flowers 5 — 8-merous. Petals yellowish, irregularly lobed. Ante- 

 sepalous stamens not opposite to the antepetalous. Disc usually 

 double. Fruit i- or 3 — 6-cclled. Seeds germinating after the fruit 

 has fallen. Flowers with an involucre of two bracteoles, arranged in 

 cymes. — Species 2. Madagascar Carallia Roxb. 



6. Flowers 4-merous. Petals entire, yellowish or green. Anthers with 



numerous cells (pollen-sacks). Disc obsciuely lobed. Ovary 2-celled. 

 Stigma 2-lobed. — Species 2. Tropical and South-east Africa. They 

 jneld timber, tanning and dyeing materials, and medicaments. " Man- 

 grove." Rhizophora L. 



Flowers 5 — 6-merous. Petals 2-lobed, brownish. Anthers with 4 cells. 

 Disc deeply lobed. Ovary 3-celled above, 1 -celled below. Stigma 

 entire. — Species i. Tropics. Yields timber and tanning bark. 



Ceriops Am. 



7. Ovary 2 — 4-celled, adnate to the receptacle by the broad base. Leaves 



opposite 8 



Ovary 5-celled, sessile or short-stalked. Stamens 10. Flowers 5-merous, 

 in few-flowered inflorescences. Seeds winged 9 



8. Disc distinctly 8 — 15-lobed. Stamens 10 — 15. Stigma entire. Placentas 



reaching the middle of the ovary only. Flowers in many-flowered 

 inflorescences, frequentl}' in glomerules. — Species 10. Tropical and 

 South-east Africa. (Under Cassipoiirca Aubl.) Dactylopetalum Benth. 

 Disc not distinctly lobed. Stamens 10 — 30. Stigma 2- 4-lobed. Placen- 

 tas reaching the base of the style. Fruit fleshy. Seeds with an aril. 

 Flowers with an involucre of two bracteoles, solitary or in few-flowered 

 inflorescences. — Species 18. Tropical and South-east Africa. (Plate 

 112.) Weihea Spreng. 



g. Ovary sessile. Tall trees. Leaves whorled. — Species 2. West Africa. 



Anopyxis Pierre 

 Ovary short-stalked. Low trees. Leaves opposite. — Species 3. Mada- 

 gascar Macarisia Tliouars 



