RUBIACEAE 445 



131. RUBIACEAE (Coffee Family) 



Annual or perennial herbs, or shrubs, or trees, sometimes climbing, occa- 

 sionally spiny. Leaves simple, entire, opposite, stipulate. Flowers axil- 

 lary or terminal, solitary, fascicled, or variously paniculate or cymose, 

 sometimes in dense globose heads. Flowers regular, perfect or 1-sexual. 

 Calyx-tube adnate to the ovary, the limb entire or 4- or 5-lobed. Corolla 

 regular, usually 4- or 5-lobed, the tube Jong or short. Stamens as many 

 as the coroHa-lobes, inserted on the corolla-tube or at its mouth. Ovary infe- 

 rior, usually 2-celled, rarely 1-celled; style simple or cleft; ovules 1 or 

 more in each cell. Fruit usually 2-celled, berry-like, capsular, or drupa- 

 ceous, or of dehiscent or indehiscent cocci. Seeds various. 



Genera about 400, species over 5,500, chiefly tropical and subtropical, 55 

 genera and about 300 species in the Philippines. 



1. Ovules few to many in each cell. 

 2. Flowers in dense globose heads. 



3. Ovaries confluent; fruits forming a fleshy mass, flowers ebracteo- 



late 1. Sarcocephalus 



S) Ovaries free or nearly so ; fruits free, dry, capsule-like ; flowers brac- 



teolate j 2. Mitragyna 



2. Flowers not in dense globose heads. 

 3. Herbs. 



4. Corolla-lobes toothed; fruit indehiscent 3. Dentella 



4. Corolla-lobes entire; fruit a loculicidal capsule 4. Oldenlandia 



8. Shrub or trees. 



4. Corolla-lobes valvate; one lobe of the calyx much-enlarged as a 



white, leaf-like appendage 5. Mussaenda 



4. Calyx-lobes twisted-imbricate; calyx-fobes all equal, not enlarged. 

 5. Style fusiform. 



6. Ovary 1-celled '■ - 6. Gardenia 



6. Ovary 2-celled 7. Randia 



5. Style cleft , 8- Hypobatherum 



1. Ovules solitary in each cell. 

 2. Erect shrubs or small trees. 



3. Ovary 4- to 9-celled 9- Guettarda 



3. Ovary 2-celled. 



4. Corolla-lobes twisted in bud. 



5. Flowers axillary, fascicled or solitary 10. Coffea 



5. Flowers panicled or corymbose. 

 6. Flowers usually 4-merous; style not much exserted.... 11. Ixora 



6. Flower 5-merous; style long-exserted 12. Pavetta 



4. Corolla-lobes valvate in bud. 



5. Flowers capitate, the calyx-tubes coherent 13. Morinda 



5. Flowers not capitate, free, solitary, fascicled, or cymose. 



6 Flowers in terminal corymbose cymes; unarmed shrubs or 



small trees 14. Psychotria 



6. Flowers axillary, solitary; spiny shrubs 15. Plectronia 



%. Herbs, spreading, erect, or climbing. 



■J Tvining herbaceous vines with rank-scented leaves; flowers in pani- 

 culate cymes = «. Paederia 



■> Spreading or ascending branched herbs with 4-angled stems, and 

 small, axillary, fascicled flowers : 17- Spermacoce 



