thumb, terete, very smooth. Leaves four to eight inches 
long, shortly petioled, or the upper sessile, elliptic-oblong 
with rounded tips, sparsely tubercled, very pale green, 
margins with short prickle-like teeth, midrib very stout. 
Flowers in racemose cymes; bracts leafy. Calyz-lobes (in 
flower) oblong, greenish brown, margins everted, serrulate. 
Corolla-tube not exserted, lobes half an inch long, oblong- 
lanceolate, violet-blue, turning red. Stamens four, on the 
mouth of the corolla, three very small; fourth much larger, 
with a long narrow anther which is longer than the 
filament. Srwiting pedicels elongate, much thickened, 
echinate; fruiting calyx (before ripening) broadly obconic, 
one inch in diameter, lobes closing over the carpels with 
es iatene everted, forming acutely-toothed wings.— 
Fig. 1, Vertical section of flower, of natural size ; 2, portion of corolla and two 
stamens ; 3, stigma; 4, section of unripe nuculi:—all enlarged. 
