RUBIACEAE A45 
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 long or short. Stamens as many 
as the corolla-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. 
8. Ovaries confluent; fruits forming a fleshy mass, flowers ebracteo- 
pt Tay Aaa Lae all EA ieee corp RAL tlh Lin tite Fae ite 1. Sarcocephalus 
3. Ovaries free or nearly so; fruits free, dry, capsule-like; flowers brac- 
Es aan Rien el SSIES ae OPEN N-ENn EON SRE SAI 2. Mitragyna 
2. Flowers not in dense globose heads. 
8. Herbs. 
4. Corolla-lobes toothed; fruit indehiscent...........................- 3. Dentella 
4. Corolla-lobes entire; fruit a loculicidal capsule ........ 4. Oldenlandia 
3. Shrub or trees. 
4. Corolla-lobes valvate; one lobe of the calyx much-enlarged as a 
white, leaf-like appendage...................---2....-------00------ 5. Mussaenda 
4. Calyx-lobes twisted-imbricate; calyx-lobes all equal, not enlarged. 
5. Style fusiform. 
Sy ta Gl A Se eos Rela el te de hy BAR I ta Le ty Bd Sl 6. Gardenia 
EES (Fig dr so | ot AMAIE Sc he Belgl, Oak pace seocha te ob rt fle. dena ba Dea ot 7. Randia 
EME SS ye a sole Mi a nt caplet Sag ie ls ARES ae 8. Hypobatherum 
1. Ovules solitary in each cell. 
2. Erect shrubs or small trees. 
3. Ovary 4- to 9-celled....................-:..-----.------- ee eee 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. Jxora 
6. Flower 5-merous; style long-exserted..................-...-- 12. Pavetta 
4, Corolla-lobes valvate in bud. 
Flowers capitate, the calyx-tubes coherent................ 13. Morinda 
5. 
5. Flowers not capitate, free, solitary, fascicled, or cymose. 
6. Flowers in terminal corymbose cymes; unarmed shrubs or 
ce LS 2 oe PL eee a. eae eee 14. Psychotria 
6. Flowers axillary, solitary; spiny shrubs............ 15. Plectronia 
1. Herbs, spreading, erect, or climbing. 
2. Twining herbaceous vines with rank-scented leaves; flowers in pani- 
Crilste: egithes:.2 pe eee ee ith 16. Paederia 
2. Spreading or ascending branched herbs with 4-angled stems, and 
small, axillary, fascicled flowers..................-......0s0-0:+++ 17. Spermacoce 
