RUBIACEAE. 177 



1. M. Roioc L. Shnili or vine: leaf-blades oblonfr to cuneate, 5-10 cm. long: 

 corolla white or redilish; lobes oblong or oblong-lanceolate. 2.5-3. .5 mm. long: 

 syncarp 2-3.5 cm. long, yellow. — Pinelands and hammocks. — F. K. {Ber., 

 Bah., Cuba, Ant.) 



12. EKNODEA tjw. Diffuse or vine-like shrults. Leaf-blades leathery. 

 Flowers axillary. Sepals 4-6, narrow. Corolla with a long tube and 4-6 

 relatively long lobes. Stamens 4-6: filaments adnate to the top of the corolla- 

 tube: anthers narrow. Drupe thin-fleshy. 



Sepals about ]4 as long as the corolla-tube : anthers narrowly linear. 1. E. llttoraUs. 

 Sepals about M- as long as the corolla-tube : anthers narrowly oblong. 2. E. angusta. 



1. E. littoralis Sw. Stem and branches prostrate: leaves fleshy; blades mainly 

 elliptic, sometimes narrowly so, 2-3.5 cm. long: corolla white; tube mostly 

 over 10 mm. long: anthers over 2 mm. long: drupes mainly globular. — Coastal 

 sand-dunes and rocky shores. — F. K. (Bah., Cuba, Aiit.) 



2. E. angusta Small. Stem and branches more slender than those of E. 

 littoralis: leaves firm; blades linear, 2-4 cm. long: corolla usually reddish; 

 tube mostly less than 10 mm. long: anthers over 1.5 mm. long: drupes mainly 

 oval.— Pinelands.— F. K. (Bah.) 



13. RICHARDIA L. Annual or perennial diffuse herbs. Leaf -blades herba- 

 ceous. Flowers in contracted involucrate cymes. Sepals 4-8, rather broad. 

 Corolla with a relatively short tube and 4-8 shorter lobes. Stamens 4-8: 

 filaments adnate to the top of the corolla-tube: anthers oblong to oval. 

 Mature carpels separating from each other. 



1. R. brasillensis (Moq.) Gomez. Perennial, the branches diffuse: leaf-blades 

 elliptic to oblong, 1.5-4 cm. long: sepals ovate to oblong-ovate, becoming 

 about 1 mm. long: corolla-lobes fully J as long as the tube: anthers oval: 

 mature carpels obovoid. — Waste places. Nat. of S. Am. 



14. DIODIA [Gronov.] L. Perennial creeping herbs. Leaf -blades soft- 

 herbaceous. Flowers axillary. Sepals 2. Corolla white or pink, salverform, 

 with a long slender tube and 4 narrow lobes. Stamens 4: filaments adnate to 

 the top of the corolla-tube, the free portion elongate: anthers linear. Stigmas 

 filiform. Drupe thin-fleshy, ribbed. 



1. D. virginiana L. Stems branching, 1-15 dm. long, sparingly pubescent on 

 the angles: leaf-blades thinnish, spatulate to linear-oblong or linear-elliptic, 

 3-8 cm. long, acute or acuminate: sepals linear to linear-lanceolate, 4-6 mm. 

 long: corolla-tube 6-8 mm. long: fruits 7-9 mm. long. — Everglades. — Button- 

 weed. 



15. DIODELLA Small. Annual diffuse herbs. Leaf-blades firm-herba- 

 ceous. Flowers axillary. Sepals 4. Corolla funnelform, with a relatively 

 short thick tube and 4 broad lobes. Stamens 4: filaments adnate up to the 

 top of the corolla-tube, the free portion very short: anthers oval or ovoid. 

 Stigma capitate or 2-lobed. Capsular fruit crustaceous, lobed. 



1. D. rigida (Cham. & Sehlecht.) Small. Branches procumbent or prostrate, 

 finely pubescent: leaf-blades thick, linear to linear-lanceolate, mostly 1-3.5 cm. 

 long, acute, minutely rough-pubescent; stipules long-setose: sepals ovate to 

 ovate-lanceolate, 1.5-2 mm. long: corolla white or pinkish, 10-15 mm. long: 

 lobes ovate to ovate-lanceolate: capsules obovoid, 2.5-3 mm. long. [D. rigida 

 Cham. & Sehlecht.]— Pinelands.— (Cw&a, .4)if.)— Buttonweed. 



Flora of Miami 12 



