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Key 5

Dicot Woody Plants with Opposite, Simple Leaves

A. Plants lianous (vine-like)

B. Petioles about 1 cm or less long

C. Leaves entire

D. Leaves smooth

E. Flowers and fruits on elongate inflorescences ................................ Chiococca alba

EE. Flowers and fruits in clusters, not markedly elongate

F. Flowers and fruits well separated, pedicels distinct

G. Leaves less than 3 cm long; corollas less than 1 cm long Matelia campechiana

GG. Leaves more than 5 cm long; corollas more than 3 cm long Coutarea hexandra

FF. Flowers and fruit in tightly congested masses, individual pedicels obscure ...................................................................................... Morinda yucatanensis

DD. Leaves scabrous (like sandpaper) .................................................. Petrea volubilis

CC. Leaves toothed ...................................................................................... Hippocratea volubilis

BB. Petioles more than 1 cm long

Inflorescence daisy-like; white ray florets and yellow disk florets enveloped by a series of bracts at the base ..................................................................................................................... Montanoa atriplicifolia

Inflorescence not daisy-like; flowers of uniform morphology, not enveloped by bracts

Leaf bases cordate (with heart-shaped lobes)

Corolla lobes as broad as long, confluent basally; fruits densely covered with coarse finger-like processes ................................................................................................ Fischeria scandens

Corolla lobes much longer than broad, well separated; fruits smooth .............. Matelea velutina

Leaf base truncate to rounded, without cordate lobes .............................. Marsdenia coulteri

AA. Plants not lianous