ACANTHACE^E. 673 



Order ACANTHACE^E. 



[Omitted on p. 636. J 



HYGROPHILA, R. Br. 



Calyx equally 4-cleft. Corolla 2-lipped, the lower lip 3-lobed. Stamens 

 4, didynamous : anther-cells parallel, spreading at the base. Stigma simple. 

 Capsule narrow, nearly terete, bearing the numerous orbicular seeds at its 

 base. — Aquatic herbs. Flowers axillary, in cymose clusters. 



H. lacustris, Nees. Stem long (2° -4°), erect from a procumbent base, 

 4-angled : leaves sessile, lanceolate ; cymes opposite, few-flowered ; calyx 

 smooth ; flowers white. — Muddy banks of the Apalachicola River (Dr. 

 Saunnan), and westward. 



STENANDRIUM, Nees. 



Calyx 5-parted. Corolla salver-form, equally 5-lobed. Stamens 4 : an- 

 thers 1-celled. Stigma truncate. Cells of the ovary 2-ovuled. — Low peren- 

 nial herbs, with a scape-like stem, clustered radical leaves, and purplish 

 flowers in a terminal spike. 



S. dulce, Nees, var. Floridanum, Gray. Smooth ; leaves oval or 

 oblong, long-petioled, as long as the scape ; spike capitate, few-flowered, the 

 bracts ciliate ; tube of the corolla longer than the calyx ; capsule club- 

 shaped. — Indian River and Key Biscayne, South Florida ( Curtiss). — Leaves 

 V long. Corolla \' wide. 



