219- RUBIACEAE 525 



77. Corolla-tube curved. Anthers included. Ovary-cells and style-branches 



2. Seeds convex-concave. Shrubs or trees. — Soecies 20. Tropics, 



(Under Psychotria L.) Chasalia Blume 



Corolla-tube straight 78 



78. Fruit with a 5 — 7-celled stone. Ovary-cells and style-branches 5 — 7. 



Corolla salver-shaped, hairy at the throat. Anthers half-exserted. 

 Shrubs or trees. Stipules 3-pointed. Flowers in corymbs. — Species 



2. East Africa and Madagascar Triainolepis Hook. fil. 



Fruit with 2 — 5 stones. Ovary-cells and style-branches or stigma-lobes 

 2, rarely 3 — 5 79 



79. Seeds flat on the ventral face. Calyx elongate. Corolla funnel-shaped, 



hairy at the throat. Anthers included. Herbs. Inflorescences capit- 

 ate. — Species 12. Central Africa. . Trichostachys Benth. & Hook. 



Seeds grooved on the ventral face 80 



80 Seeds with a ruminate albumen. Corolla salver-shaped, hairy at the 

 throat. Anthers half-exserted. Shrubs. — Species 50. Tropical and 

 South Africa. (Under Psychotria L.) Grumilea Gaertn. 



Seeds with a uniform albumen. — Species 200. Tropical and South Africa. 



{Myrstiphyllum P. Br., including Uragoga L. partly). . . Psychotria L. 



Si. (i.) Corolla with imbricate, sometimes contorted aestivation. Shrubs or 



trees 82 



Corolla with valvate aestivation 124 



52. Corolla with imbricate, not contorted aestivation. Ovary 2-celled. 



Style simple. Inflorescences head-hke. [Tribe NAUCLEEAE.] . 83 

 Corolla with contorted aestivation 88 



53. Ovaries of each head connate. Fruits fleshy, connate 84 



Ovaries separate. Fruits dry, separate, opening by two valves or breaking 



up into two mericarps 85 



84. Inflorescences surrounded by two at first united involucral bracts. — 



Species 10. Madagascar and Mascarene Islands. Breonia A. Rich. 

 Inflorescences without involucral bracts. — Species 3. Tropics. They 

 yield timber, edible fruits (negro-peaches), arrow-poison, and medica- 

 ments. Sarcocephalus Afzel. 



85. Ovules 2 — 3 in each ovary-cell. Calyx 4-toothed. Fruit separating 



into two nutlets. (See 16.) Cephalanthus L. 



Ovules 6 or more in each ovary-cell. Calyx 5-lobed or 5-parted. . . 86 



86. Ovules 6 — 8 in each ovary-ceU. Flowers bracteolate, in glomerules col- 



lected in heads. Stem erect. — Species i. Madagascar. 



Paracephaelis Baill. 

 Ovules numerous in each ovary-cell. Flowers ebracteolate, in heads. . 87 



87. Fruit separating into two 2-valved mericarps. — Species 2. Madagascar. 



They yield timber, dye-stuffs, edible fruits, and medicaments. 



Nauclea L. 



Fruit opening by two valves. Stem chmbing by hooks. — Species 2. 



Tropics. {Ourouparia Aubl.) Uncaria Schreb. 



