ACANTHACE^E. 673 



ORDER ACANTHACE^E. 



[Omitted on p. 636.] 



HYGROPHILA, K. 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 Kiver (Dr. 

 Saurman), 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 

 I' long. Corolla |" wide. 



