174 



EUBIACEAE. 



Flowers in dense heads, the hypanthia not coalescent. 

 Flowers solitary or in an open inflorescence, or if 

 clustered, the hypanthia coalescent. 

 Ovule pendulous. 



Filaments wholly or partly adnate to the 



corolla-tube. 

 Filaments not adnate to the corolla-tube. 

 Inflorescence terminal. 

 Inflorescence axillary. 

 Ovule not pendulous. 



Ovule or seed with a basal attachment. 

 Ovule or seed with a lateral attachment. 

 Shrubs or trees. 



Flowers in terminal clusters, the hypan- 

 thia coalescent : sepals minute or 

 obsolete. 

 Flowers axillary and solitary : sepals 

 slender. 

 Herbs. 



Stipules relatively small or inconspicu- 

 ous, more or less cleft. 

 Ovary 3- or 4-celled. 

 Ovary 2-celled. 



Mature carpels merely separating 

 from each other. 

 Styles partially united : stigmas 

 slender : corolla salverform. 

 Styles united to the top : stigma 

 capitate or 2-lobed : corolla 

 funnelform. 

 Mature carpels dehiscent. 



Fruit septicidal, and both car- 

 pels ventrally dehiscent. 

 Fruit separating into carpels, 

 one of which opens through 

 the ventral face, the other 

 remaining closed. 

 Stipules foliaceous, usually resembling 

 the leaves. 



6. Cephalanthus. 



7. guettaeda, 



8. Erithalis. 



9. Chiococca. 



10. psychotria. 



11. MORINDA. 



12. Eenodea. 



13. RiCHARDIA. 



14. DiODIA. 



15. DiODELLA. 

 IC. BOERERIA. 



17. SrERMACOCE. 



18. Galium. 



1. HOUSTONIA L. Erect or creeping herbs. Leaf-blades na^ro^v or 

 broad. Flowers in open or compact cymes. Sepals 4, commonly narrow. 

 Corolla funnelform or salverform: tube long: lobes mostly shorter than the 

 tube. Stamens 4: filaments adnate to above the middle of the corolla-tube. 

 Style slender. Capsule seated on or in the hypanthium, flattened. 



1. H. filifolia (A. Gray) Small. Plants loosely or diffusely branched, 0.5-2 

 dm. tall: blades of the stem-leaves narrowly linear to subulate, 0.5-3 cm. 

 long: sepals lanceolate, becoming deltoid, scarcely 1 mm. long: corolla white 

 or purplish; tube about 3 mm. long, sparingly pubescent within: capsules 

 globose-obovoid, about 1.5 mm. long.— Pinelands. — F. K. 



2. EXOSTEMA L. C. Eich. Shrubs or trees. Leaf-blades leathery. 

 Flowers axillary or in paniculate cymes. Sepals 5, short. Corolla with a 

 slender tube and 5 narrow lobes. Stamens 5 : filaments adnate to the base of 

 the corolla-tube, pubescent below : anthers narrowly linear, exserted. Capsule 

 elongate. Seeds winged. 



1. E. caribaeum (Jacq.) E. & S. Shrub or small tree, the foliage glabrous: 

 leaf -blades oVjlong to elliptic, 2-6 cm. long: sepals 1-2 mm. long: corolla white 

 or , rose-tinged ; the tube 3.5-4 cm. long; lobes narrowly linear: capsules 

 elliptic, 10-12 mm. long. — Hammocks. — F. K. (Bah., Cuba, Ant.) — Prince- 

 wood. 



3. CASASIA A. Eich. Unarmed shrubs or trees. Leaf-blades leathery. 

 Flowers in axillary cymes. Sepals 5, broad or narrow. Corolla with a stout 



