A soft, depressed, perennial? herb, at first stemless, 
afterwards acquiring a stem, which is round, pale, and 
pubescent. Leaves with long stalks, oblong, toothed, ly- 
rate, pubescent, dull-green: the lateral segments linear, 
obtuse, the terminal one larger and toothletted. Flowers ses- 
sile, axillary, opening in the evening, twice as short as the 
leaves. Calyx with a round, slender, somewhat clavate 
tube: the lobes somewhat lanceolate, acute, on one side 
conniving at the tip; on the other divided into two por- 
tions. Petals, white, spreading, obovate, retuse, green at 
the base. Stamens erect, pale yellow, shorter than the 
petals. Ovarium four-cornered. Style filiform, as long as 
the tube of the calyx. Stigma exserted, four-lobed: lobes 
linear. Capsule sessile, oblong, woody, four-celled, with 
four hard wings at the upper end. 
*3iLs 
