GEIS^ERA. 



I. EHIZOPHORE^. 



1. Rhizophora L. — Flowers regular; receptacle concave obconical. 

 Sepals 4, inserted in margin of receptacle, coriaceous, valvate. 

 Petals 4, alternate, valvate. Stamens 8, 4 oppositipetalous, longer 

 (or more rarely 12) ; filaments perigynous with perianth, short or 

 subnil ; anthers elongate pointed finally 2-valvate ; furrows of anthers 

 lateral or subintrorse, sometimes incomplete ; cells areolate-multilo- 

 cellate. Germen semi-inferior, 2-locular, at vertex produced to a 

 cone ; style subulate, often short, at apex stigmatose 2-dentate. 

 Ovules in cells 2-nate, collaterally descending ; micropyle extrorsely 

 superior. Fruit girt below the middle with reflexed persistent cialyx, 

 coriaceous, indehiscent. Seed 1, descending; cotyledons of exal- 

 buminous embryo conferruminate ; radicle perforating the apex of 

 the seed germinating within the fruit while remaining on the tree 

 and of the pericarp, elongately clavate and seeking the mud. Trees 

 and shrubs oftener glabrous ; branches thick cicatrized ; leaves oppo- 

 site, petiolate, coriaceous entire glabrous; stipules interpetiolate, 

 caducous ; flowers in axillary pedunculate, ramosely 2-3-chotomous 

 cymes; pedicel girt at base with lateral bracteoles connate in a 

 cupule. (All trop. shores.) — See p. 287. 



2. Ceriops Arn.^ — Flowers nearly of Rhizophora,^ 5-6-merous ; 

 petals^ inserted at base of fleshy 10-12.1obed disk. Stamens 10-12 ; 

 those opposite petals longer;* filaments slender, alternating with 



1 Ann. Nat. Sist. i. 363.— Endl. Gen. n. 6099. •■• Emarginate ; lotes setixlose clavate appen- 

 — H. Bn. Adansonia iii. 33. — B. H. Gen. 679, diculate. 



n. 2.— Hook. Fl. Lid. ii. 436. ■< Petals finally 2-nately opposite (for the 



2 Generally much smaller. reason of which see Hull. Soe. Linn. Par. 58). 



