Leaves alternate, rather small, on petioles scarcely longer than 
themselves, cordate, approaching to reniform, glabrous, acute, 
obsoletely serrated.. Peduncles axillary, solitary, single-flowered, 
longer than the leaves. Mower large, yellow. Calyz slightly 
hairy. Lateral sepa/s small, ovato-lanceolate, green: two upper 
ones large, yellow, rotundate, forming a helmet: lower sepal 
large, yellow, cucullate, ending in a short horn, which is much 
‘ incurved and clavate at the point. Lateral pefa/s two-lobed, the 
lobes very unequal, the upper ones rounded. J/aments white, 
clavate, ciliated. Ovary hairy. 
