404 



RUBIACEM, 



1, Cephalanthus. 



LX.-RUBIACE^. 



Trees, shrubs or herbs, rarely annuals, erect or twining, with 

 or without spines, rarely truly prickly. Leaves simple, opposite or 

 whorled, quite entire, stipulate (except in ^aliece). Inflorescence 

 various. Calyx'tuhe adnate to the ovary, limb various. Corolla 

 usually regular, 4 — 5-lobed ; lobes valvate imbricate or contorted. 

 Stamens 4 — 5, inserted on the mouth or tube of the corolla ; 

 anthers 2-celled, usually dorsifixed and dehiscing laterally or in 

 front. Disk epigynous, usually annular or cushion-shaped. Ovary 

 wholly inferior, 2 — 10-celled ; style simple or cleft, stigmas various ; 

 ovules 1 or more in each cell. Fruit a berry capsule or drupe, or of 

 dehiscent or indehiscent cocci, 2— 10 celled. Seeds various, endo- 

 sperm fleshy or horny. — Species about 4,000, chiefly tropical or 

 subtropical. 



Ovules usually many in each cell (solitary in 

 Cephalanthus) 



Flowers in dense globose heads. 

 Ovaries confluent, fruits forming a 

 globose fleshy mass, cor-lobes imbri- 

 cate in bud.— A shrub 

 Ovaries free or nearly so, capsules free, 

 cor-lobes imbricate or valvate.— Trees. 

 Flowers bracteolate. 

 Calyx-limb o-lobed, stigma clavate 2. Adina. 



Calyx-limb entire, stigma mitri- 

 form . . . . . .3. MiTRAGTNA. 



Flowers without bracteoles. — A climb- 

 ing shrub with hooked peduncles • 4. Uncabia. 

 Flowers not in globose heads. 

 Seeds winged.— A tree . . • . 5. Htmenodictt< 

 Seeds not winged. 

 Cor-lobes valvate in bud.— Herbs. 

 Cor-lobes toothed, fruit indehiscent 6. Dentella. 



Cor-lobes entire, fruit usually a 2- 

 celled capsule. 



Anthers opening by apical pores • 7. Abgostekua. 

 Anthers opening laterally. 

 Flowers usually 4-merous 

 Cal-tQeth contiguous on the 

 capsule • • • . 8. Hzdtotis. 



