TnOiPICAL AMERICAN RUBIACE^ 



3^7 



odourlses 



drupaceous 



fruit dry, dehiscent 



Style short ; fruit 



woody plants 

 Style long, filamentous 

 fetid climbing plants 

 Flowers usually dioecious ; stamens usually in- 

 serted at base of corolla 

 Ovule affixed to septum. 



Stij)ules entire, not leafy ; trees' and shrubs 

 Stipules fimbriate ; herbs and subherbaceous 

 Stipules like the leaves, forming whorls with them 

 Stipules each a pair of small hooks (Mexican) 



PSYCnOTRIE^ 



p.ederie.e 



Anthospekme.e 



MoilINDKiE 

 SPEKMACOCKiE 



Galiete 

 Didyvicea in 

 Galieae 



Key to the Genera of each Tribe. 

 Naucle^. 



Fruit forming a globose syncarp, the floral calyces being 



confluent ; ovules solitary in the flowers 

 Fruits separate, each a capsule with many ovules, 

 climbers 



Hooked 



Cinchone^. 



A. Corolla-lobes valvate (Eucinchone.e). 

 Placenta pendulous from apex of loculus . . 

 Placenta ascending or erect from base of septum. 

 Climbing plants 

 Erect plants 

 Placenta adnate to middle of septum. 

 Leaves varnished, metallic 

 Leaves not varnished, nor metallic. 



Leaves coarsely crenate, whole plant glandular- 

 pustular (Northern La Plata) 

 Leaves entire. 



Branchlets spine-like, leaves minute, flowers soli- 

 tary (Bolivia) ... . . • • • • 

 Branchlets not spine-like, leaves not minute, 

 flowers many in an inflorescence. 

 Herbs or small sub-shrubby plants : flowers long 



narrow-tubular : capsule loculicidal 

 Trees, or large shrubs : capsule (exc. in Macru- 

 cnemum and Joosia, q.v.) septicidal. 

 * Capsule splitting from below upwards 

 *Capsule splitting from above downwards. 

 Fruit dehiscing into 4 spirally-coiled valves : 



coiolla-lobes bifid 

 Fruit not so dehiscing : corolla-lobes entire 

 or sub-entire. 

 Capsule loculicidal . . 

 Capsule septicidal. 

 Valves bifid 

 Valves entire. 



Capsule small (barely 1 cm.). Flowers 



closely aggregated 

 Capsule large (over 2 cm.). Flowers 

 loosely associated, stalked 



Cephalanthus 



Uncaria 



{Ourouparia) 



Alseis 



Manettia 

 Hindsia 



Stilpnoplujllum 

 Heteropliylliva 

 Lccanosperma 



Bunvardia 



Chichona 



Joosia 



3Iacrocnennuii 

 llemijia 



PimcntcUa 



Ladenhergia 



(includes 

 Cascarilla) 



* See fig. 4. 



