RUBIACEiE. (madder FAMILY.) 191 



Synopsis. 



Suborder I. COFFEES. Ovules aud seed solitary iu the cells (except 

 No. 6). Calyx tube adherent to the ovary. 



§1. Leaves whorled. Stipules none. 



1. GALIUM. Corolla rotate, valvate in the bud. Fruit 2-celled. Herbs. 



§ 2. Leaves opposite, rarely three iu a whorl, with stipules interposed. 

 * Herbs. Mature fruit dry. Flowers single or clustered. 



2. SPERMACOCE. Carpels 2, one or both open on the inner face. Flowers clustered. 



Calyx lobes persistent. 



3. RICHARDIA. Carpels 2-4, closed. Calyx lobes deciduous. Flower clusters terminal. 



4. DIODIA. Carpels 2 - 3, bony and closed. Style 2-cleft. Albumen fleshy. 



* * Shrubs. Fruit dry. Flowers in globular peduncled heads. 



5. CEPHALANTHUS. Carpels 2-4, separating at the base, closed. 



* * * Shrubs. Fruit fleshy or pulpy. Flowers mostly axillary. 



•1- Ovaries united, forming a compound berry in fruit. 



6. MITCHELLA. Flowers by pairs. Stamens 4. Berry 4-seeded. 



7. MORINDA. Flowers numerous. Stamens 5. Berry 1-seeded. 



H- -I- Ovaries and fruit separate. 

 ++ Albumen horny. 



8. CHIOCOCCA. Fruit flattened, even. Stigma entire. Seeds suspended. 



9. PSTCHOTRIA. Fruit ribbed. Stigma 2-lobed. Seeds erect. 



■i-i- ++ Albumen fleshy. 



10. STRUMPFIA. CoroUa bell-shaped. Anthers subsessile, united. Leaves whorled. 



11. GUETTARDA. Corolla salvcr-form. Anthers subsessile, separate. 



12. ERITHALIS. Corolla subrotate. Filaments slender. Flowers panicled. 



13. ERNODEA. CoroUa salver-form. Flowers axillary, solitary. 



Suborder II. CINCHONE^. Ovules and seeds numerous in the cells. 

 Calyx tube adherent to the ovary. Leaves opposite. 



* Fruit baccate, indehiscent. Shrubs. 

 4- Fruit 5-celled. 



14. HAMELIA. Flowers cymose. Corolla cylindrical, crimson. 



■I- 4- Fruit 2-celled. 



15. GENIPA. Flowers cymose. Corolla salver-form, white. Berry large. 



16. RANDIA. Flowers solitary. Corolla 5-lobed, convolute in the bud. 



17. CATESB^A. Flowers solitary. Corolla 4-lobed, valvate. 



* * Fruit capsular, loculicidally dehiscent. 

 ■t- Shrubs or trees. 



18. PINCKNEYA. Shrubs or trees. Flowers cymose, terminal. Seeds winged. 



19. EXOSTEMMA. Shrubs. Flowers solitary, axillary. Seeds winged. 



•I- •»- Herbs. Corolla valvate. Seed wingless. 



20. HOUSTONIA. Corolla tunnel- or salver-form, 4-lobed, longer than the calyx, 



21. OLDENLANDIA. Corolla rotate, 4-lobed, shorter than the calyx. 



22. PENTODON. Corolla funnel-form, 5-lobed. Capsule included in the calyx. 



1. GALIUM, L. 



Calyx teeth obsolete. Corolla rotate, 3 -4-lobed. Stamens 3-4. Styles 2, 

 united at the base. Stigma capitate. Fruit double, separating into two 1- 

 seeded closed carpels. Albumen horny. — Slender herbs, with scjuare stems 

 and whorled leaves. Flowers minute. 



