120 PENTANDRIA. MONOGYNIA. 



183. MENYANTHKS. i. (Buckbean. Marsli 

 Trefoil.) 



Calix 5-parted. Corolla fuimol-formed; bor- 

 der spreading, 5-Iobed. equal, densei}' villous 

 on the upper side. Stigma bifid. Capsule I - 

 celled, 2 valved; a seminal receptacle attached 

 to each valve. 



Herbaceous, aquatic, leaves ternate, alternate, petiole 

 sheathing. 



Species. 1. M. trifoUata. A g-enus of a single spe- 

 cies, common boih to Eurone and North America. "Bit- 

 ter and sudorific." Smith. Flor. Brit. i. p. 226. 



184 VILLARSIA. Gmelin. 



Calix 5-j)arted. Corolla rotate. 5-I( bod, seg- 

 ments bearded at the base, with the margins 

 inflected. Stigma 2-lobed. Glands 5, alternating 

 with the stamina. Capsule 1 -celled, valveless. 



Floating aquatic herbs; with alternate entire leaves, and 

 clus'ers of peduiiculaie fioweis, apparently bursting from 

 the sheathing petioles. 



Species. 1. V- lacitnosa^ {Menyunthes trachysperma, 

 Mich.) 2 cordatUy Llliott. 



185. HOTTONIA. L. (Water-feather.) 



Calix 5 parted. Corolla salverform, 5-Iobed, 

 Stamina seattd upon the tube of the corolla. 

 Stigma globular. Capsule 1 -celled, globose, acu» 

 minate. 



Aquatic herbs; leaves verticillate, pec'inately pinnalifid, 

 mul'ifid or si' ply serrate; flowers solitary, axillary, or 

 terminal, and verticillately spiked, involucrum under each 

 verticil, man} -leaved. Does this plant really germinate 

 with 2 cotyledons? 



Species. 1. H. infata,Ei.i.. Verticilli about 4.flow- 

 erert; flowers sl>ortl\ pedunculate; corolla white, so.ne- 

 what shorter than the calix; scape short, articulated, ii^ter- 

 nodes ar d lower part mflaied; leaves ailernaie, crowded, 

 pectinately pinnatifid. 



