A. Median longitudinal section through vertical rhizome of V. cruziana var. trickeri, xO.25; petiole base (p) with abaxial adventitious roots (r), peduncle (pe), and young floral buds (f).
B. Portion of peduncle. Note large persistent spines. x 0.5.
C. Flower of V. amazonica at anthesis showing transition from sepals (se), outer (op) and inner (ip) petals to outer (os) and inner (is) staminodia. From Caspary (1888 : 7). xO.4.