GENEKA. 



I. KHAMNE.E. 



1. Rhamnus T. — Flowers hermaphrodite or polygamo-diœcious ; 

 receptacle very concave, obcouical or urceolate, lined with a thin or 

 more rarely somewhat thickened disk entire at apex. Sepals 4, 5, 

 3-angular, valvate, inserted at margin of receptacle. Petals 4, 5, (or 

 sometimes 0), small, cucullate, or flat. Stamens same in number 

 oppositipetalous, inserted with perianth ; filaments short ; anthers 

 introrse, 2-rimose. Germen inserted at base of receptacle (in male 

 flower effete rudimentary), free, 3-4-locular ; style erect, at apex 

 more or less deeply 3-4-lobate or ramose stigmatose. Ovule in cells 

 1, suberect ; micropyle introrsely inferior, finally more or less 

 lateral. Fruit drupaceous, spherical or oblong, girt at base with 

 very short annular scar of receptacle ; pyrena; 2-4, osseous or 

 cartilaginous, finally obscurely dehiscent within or opening at 

 base, oftener indéhiscent. Seeds obovate compressed or sulcate, 

 sometimes dilated at base to a short aril, albumen fleshy (some- 

 times 0) ; cotyledons of straight embryo flat or recurved at margin, 

 fob'aceous or fleshy ; radicle inferior short. — Trees or shrubs ; leaves 

 alternate subopposite (deciduous or persistent) petiolate, entire or 

 dentate ; stipules lateral small, deciduous ; flowers axillary in simple 

 fasciculate or ramosely compound cymes. {All tvarm mid temp, 

 regions.) See p. 52. 



2. Rhamnidium Reiss. 1 — Flowers nearly of Rhamnus ; recep- 

 tacle subturbinate or shortly obconical, lined with a disk. Perianth 



Mart. Fl. Bras. Mamn. 94, t. 31.— B. H. lien. 378, n. 11. 



