20 RUBIACE^E. , 



* * Fruit capsular or at least dry, 2-celled : seeds several or niimerous in each cell, wing- 

 less : calyx-tulie short ; lobes persistent : corolla valvate in the bud : almost all herbs, with 

 leaves no more than opposite : stipules not setose, or in one species setulose. 



•i— Summit or sometimes even three fourths of the capsule free from the calyx at maturity : 

 flowers in most and probably in all heterogoue-diuiorphous : seeds peltate : albumen cor- 

 neous. 



4. HOUSTONIA. Flowers 4-merous. Calyx-lohes mostly distant. Corolla salverform to 

 funuelform, Avith 4-parted limb. Stamens (according to the form) inserted either in the 

 throat or lower down on the tube : anthers oblong or linear, fixed by near the middle. Style 

 reciprocally long or shorter : stigmas 2, linear or oblong. Capsule usually somewhat didy- 

 mous-globijlar, or emarginate at the free summit, there loculicidal, occasionally afterwards 

 partially septicidal. Seeds few or moderately numerous in each cell, on usually ascending 

 placentiJC, acetabuliform, meniscoidal, or sometimes barely concave on the hilar face, not 

 angulate; testa scrobiculate or reticulate. 



-1— -i— Summit of capsule not extended beyond the adnate calyx-tube : flowers not hetero- 

 gone-dimorphous, small : seeds numerous, angulate or globular, smooth or nearly so : 

 albumen fleshy. 



5. OLDENLANDIA. Flowers 4-merous. Corolla from rotate to short-salverform, 4-lobed. 

 Stamens short : anthers ovaL Capsule hemispherical, oval, or turbinate, loculicidal across 

 the summit. 



6. PENTODON. Flowers .'i-mcrous. Calyx-tube turbinate or obpyramidal : limb of 5 del- 

 toid-subulate teeth, in fruit distant. Corolla short-funnelform, 5-lobed. Stamens 5, short : 

 anthers short-oblong. Capsule obconical, obscurely didymous, loculicidal across the trun- 

 cate summit. Seeds very numerous, minute, reticulated. Stipules or some of them 2-4- 

 subulate. 



* * * Fruit baccate or at least fleshy^ and indehiscent, many-seeded (rarely few-seeded), 



•f— Five-celled : shrubby. 



7. HAMELIA. Calyx 5-toothed, persistent. Corolla tubular, 5-lobed, imbricated in the 

 bud. Stamens inserted low on the tube: filaments short: antliers linear. Style filiform: 

 stigma fusiform, sulcate. Berry ovoid. Seeds very numerous in the cells, minjite, angulate 

 or flattened. Inflorescence scorpioid-cymose. 



-1— -1— Ovary and fruit 2-celled, sometimes imperfectly so b\^ the placenta; not meeting in 

 the axis : shrnljs. 



8. CATESB-^A. Flowers 4-merous. Calyx-lobes sultulate, persistent. Corolla funnel- 

 form ; lobes short, ovate or deltoid, valvate in the bud. Stamens inserted low down on the 

 tube : anthers linear. Ovary 2-ceIled : style filiform : stigma undivided. Berry coriaceous, 

 globular. Seeds flattened. 



9. RANDIA. Flowers 5-merous, rarelv 4-7-merous. Corolla salverform or somewhat fun- 

 nelform; the lobes convolute in the bud. Stamens inserted on tlie throat of the corolla: 

 filaments short or none : anthers linear, acute or acuminate. Ovary completely 2-celled : 

 style stout : stigma clavate or fusiform, entire or 2-lobed. Berry globose or ovoid. Seeds 

 mostly imbedded in the pulpy placenta, sometimes very few: testa thin, adherent to the 

 corneous albumen. 



10. GENIPA. Flowers 5-merous. Calyx-tube more or less ])roduced beyond the summit 

 of the ovary, the border truncate or sometimes bearing small teeth. CoroUa salverform ; 

 the lobes convolute in the bud. Anthers linear, nearly sessile. Ovary one-celled, with two 

 projecting parietal placenta? which almost meet in the centre. Berry large, becoming 2- 

 celled by the junction or coalescence of the ample pulpy many-seeded placentas in the centre. 

 Seeds large, flat : albumen cartilaginous. 



Series II. Coffeaceje. Ovules solitary in the eells of the ovary : leaves 

 with obvious stipules, opposite or only casually in threes or fours, 



* Slirubs : flowers compacted in pedunculate heads with a globose receptacle. 



11. CEPHALANTHUS. Flowers 4-merous, crowded in along-pedunculate head, but 

 distinct, dry in fruit. Calyx oblong, soon obi)yramidal : limb obtusely 4-lobed. CoroUa 



