310 FLOKA OF TEXAS. 



SYNOPSIS. 



Sub-order I. Coflfeese. Ovules and seed solitary in 

 the cells. Calyx-tube adherent to the ovary. 



* Leaves {and leafdke sUimles) whorled ; ovary adherent. 



Corolla rotate, 4-parted, valvate in the bud. Fruit lUeUed. Herbs Galium. 



Carpels 2, one of them closed by partition. Flowers clustered Spermacoce. 



both open on the inner face. Flowers clustered Borreria. 



2-3, bony, and closed. Style 2-clef t. Albumen fleshy Diodia. 



2, somewhat fleshy, closed. Style entire. Abumen homy Ebnodea. 



** Shrubs ; fruit dry ; flowers in globular pedunded heads. 



Carpels 2-4, separating at the base, closed .Cephalanthus. 



Flowers by pairs. Stamens 4. Berry 4-seeded Mitchella. 



Sub-order II. Cinchoneae. Ovules and seeds nu- 

 merous in the cells. Calyx- tube adlierent to the ovary. 

 Leaves opposite. 



* FYuit capsular ; loculicidally dehiscent. 



Herbs. Capsule often free from the calyx above. Seeds wingless. 



Oldenlandia. 



Sub-order III. Loganieae. Ovules and seeds nu- 

 merous in the cells. Calyx free from the ovary. Fruit 

 capsular. Leaves opposite. 



** Herbs. 



Corolla short, ^-Idbed. Styles 2, united above Mitreola. 



Alobed. single Poltpremttm. 



** Evergreen woody tines. 

 Corolla campanulate. Seeds winged Gelsbxium . 



GALIUM, L. Cleavers; Bedstratv. 



Calyx-limh minutely 4-toothed ; corolla rotate, 4-cleft ; 

 stamens 4, short; styles 2; carpels 2, united, separating 

 into two 1 -seeded indehiscent nutlets. — Herts, with slender, 

 4-angled stems ; verticels of 4, 6 or 8 leaves, rarely of 5. 



