American shrubs and climbers, with widely gaping, showy flt. often 2 in. long: lbs. opposite, nearly equal or widely unlike: fl. solitary or numerous, maxillary, stalked or not, without bracts or with bracts in an involution;
corollas scarlet, carmine or yellowish. Half a dozen species, mostly red or orange-fld., are cult. abroad and
may be known to a few fanciers at home, but none are advertised by the dealers.