1914] 
GATES—A TEXAN SPECIES OF MEGAPTERIUM 403 
less disclose a considerable number of forms. The ripe fruits 
from these specimens are broadly winged, nearly orbicular, 
about 35 mm. long and 25 mm. wide, retuse or acuminate at the 
apex. 
Examination of herbarium specimens of M. missouriensis 
(Sims) Spach makes it evident that the polymorphism in this 
species as now understood is quite as great as in many species 
of GEnothera. There are included races varying in amount and 
character of pubescence, in width of leaf from broadly lanceolate 
to almost linear, in presence or absence of purple spots on the 
sepals, in size of flower, and other features. 
