42 RUBIACEiE. Hedtotis. 



than the slightly compressed roundish-ovoid fruit. — DC! inodr.^. p 420; 

 Hook.! cojnpan. to hot. mag. \. p. 48. 



Borders of ponds and streams, and in open grounds, Carolina {Bosc !) to 

 Louisiana, Tainturier ! Drummond ! Dr. Carj^enter ! Alexandria, Dr. Hale! 

 and on the banks of the Sabine, Dr. Leavemcorth ! July-Sept. — Stems 6- 

 10 inches long. Leaves about an inch in length. Flowers minute; the 

 fruit scarcely more than a line long, minutely scabrous, crowned with the 

 rather short calyx-teeth. Corolla (purplish, Leavemcorth,) with scarcely any 

 tube. The plant turns blackish in drying. — Somewhat intermediate between 

 the sections Scleromitrion & Oldenlandia of Wight & Arnott. 



§ 4. Corolla rotate, much shorter than the teeth of the calyx, which are erect in 

 fruit, with the sinuses acute : stamens scarcely longer than the lohcs of the 

 corolla : anthers subglohose : style nearly none : stigmas oblong, ohtuse : 

 capsule globose-compressed, wholly coherent loith the tube of the calyx, 

 emarginate, loculicidally dehiscent across the summit: seeds very numerous 

 and minute (60 or more in each cell), angular : herb annual, %vith the habit 

 of Elatine : stipules hisubulate on each side : flowers solitary or mostly 

 glomerate in the axils of the leaves. — Elatinella. 



This and the pi'eceding sections should probably be considered mere divisions of 

 the subgenus Oldenlandia, whenever that group shall be definitely characterized. 



10. H. glomcraia (Ell.) : stems difTuse or somewhat erect, hirsute-pubes- 

 cent, branching : lea\'es oblong or elliptical-lanceolate, narrowed at the 

 base, or slightly petioled, nearly glabrous ; flowers mostly glomerate in the 

 axils ; tube of the calyx hirsute, shorter than the ovate or oblong foliaceous 

 lobes.— K/. sk. 1. p. 187 ; Torr. ! ft. 1. p. 171 ; DC. ! prodr. 4. p. 421. 

 H. auricularia, Walt. Car. p. 85, not of Linn. H. uniflora. Lam. 1 H. 

 glomerata & H. Virginica, Spreng. syst. 1. p. 412. Oldenlandia imiflora, 

 Linn.! spec. 1. p. 119. O. glomerata, Michx. ! fl. 1. p. 83,- Pursh, fl. 

 1. p. 102. 



Margin of swamps, and especially brackish marshes. New York ! and 

 New Jersey! to Florida! and Louisiana! June-Oct. — Stem 2-18 inches 

 high. Leaves half an inch to an inch long, often slightly pubescent, some- 

 what 3-nerved at the base, slightly veiny. Stipules on each side cleft near- 

 ly to the base into 2 subulate divisions, which are as long as the petioles or 

 narrowed base of the leaves. Flowers small, seldom solitary or three to- 

 gether, and then })edicellate, usually in small dense clusters. Corolla many 

 limes shorter than the limb of the calyx, white ; the lobes semiovate. The 

 plant does not turn blackish in drying. 



§ 5. (An gen. ?) Flotvers pentamerous : corolla infundihuliform, 5-lobed, 

 somewhat longer than the 5 lanceolate-subulate teeth of the calyx, which are 

 erect in fruit, with the sinuses obtuse ; stamens 5, included, inserted towards 

 the base of the corolla : anthers oblong : style as long as the stamens : cap- 

 sule turbinate, wholly coherent ivith {and rather shorter than) the tube of the 

 calyx, loculicidal at the summit : placentee pedicellate from the middle of die 

 septum, horizontal: seeds very numerous, angular: herb jierennial, dichoto- 

 inous : stipules 2— ^-subulate on each side : flowers axillary, someichat cyiU' 

 ulose. — Pentotis. 



11. H Halei: glabrous; stem diffuse, dichotomous ; leaves oval-oblong, 



