520 219. RUBIACEAE 



terminal, solitary or in groups of 3, surrounded by an involucre. Trees. 



— Species i. Madagascar Pleurocoffea Baill. 



Corolla with a straight tube 34 



34. Flowers with an epicalyx. Style 2 — 6-cleft 33 



Flowers without an epicalyx, hermaphrodite. Style 2-cleft or simple. 



Ovary 2-celled 36- 



35. Flowers in terminal corymbs, 4-merous polygamous. Epicalyx 2-partite. 



Corolla glabrous at the throat. Fruit globose. — Species 5. Mascarene 

 Islands. They yield timber, and are used in medicine. Myonima Comm. 

 Flowers in axillary fascicles, 5 — 8-merous, hermaphrodite. Ovary 2- 

 celled. — Species 50. Tropics ; one species also cultivated in Madeira. 

 Several species (especially C. arahica L. and C. liherica L.) yield coffee, 

 oil, medicaments, a substitute for tea, and timber ; some are used as 

 ornamental plants. (Including Solenixora Baill.) . . . Coffea L. 



36. Calyx entire. Corolla-tube short, glabrous at the mouth. Stamens 5. 



Style-branches 2, linear, ending in a cone. Shrubs. Stipules united. 

 Flowers in axillary, few-flowered cymes. — Species i. Madagascar. 



{Buseria Dur.) Leiochilus Hook. fil. 



Calyx toothed. Corolla-tube long. Stamens 4, rarely 5. Flowers in 

 usually terminal and many-fiowered cj'mose corymbs 37 



37. Bracts at the base of the lowest branches of the inflorescence connate 



into a sheath. Style-apex entire or shortly 2-toothed. — Species 120. 

 Tropical and South Africa. Some have edible fruits or serve as orna- 

 mental or medicinal plants. (Plate 144.) Pavetta L. 



Bracts at the base of the branches of the inflorescence not connate into 

 a sheath. Style-apex 2-cleft. Leaves leathery. Stipules not united. 



— Species 60. Tropics. Some are used as ornamental plants or in 

 medicine Ixora L. 



38. (31.) Stem woody. Stipules small, undivided, combined into a sheath. 



Flowers in heads, connate by their ovaries. Calyx truncate or with 

 small teeth. Ovary 4-celled. Ovules inserted in the inner angle near 

 the base. Style 2-cleft. Fruit formed of connate drupes. — Species 

 6. Tropics. They yield timber, dyes, mucilage, condiments, and 



medicaments. [Tribe MORINDEAE.] Morinda L. 



Stem herbaceous or woody at the base, rarely [Gaillonia) throughout, but 

 then flowers solitary or in cymes or spikes. Stipules more or less 

 lacerated or leaf-like. Ovary 2 — 3-celled 39. 



39. Stipules similar to the leaves ; hence leaves apparently whorled. Style 



2-cleft or 2-parted, with head- or club-shaped stigmas. Fruit indehis- 

 cent ; seed adnate to the pericarp. [Tribe GALIEAE.] .... 40 

 Stipules unhke the leaves, toothed slashed or crowned by bristles, united 

 at the base. Ovules inserted near the middle of the partitions of the 

 ovary. [Tribe SPERMACOCEAE.] 46 



40. Corolla funnel-shaped 41 



Corolla wheel- or bell-shaped. Calyx-limb indistinct or wanting. . . 43, 



