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Vines and Climbing Plants of Puerto Rico and the Virgin Islands

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<strong>Vines</strong> <strong>and</strong> <strong>Climbing</strong> <strong>Plants</strong> <strong>of</strong> <strong>Puerto</strong> <strong>Rico</strong> <strong>and</strong> <strong>the</strong> <strong>Virgin</strong> Isl<strong>and</strong>s 233<br />

24. Family FABACEAE<br />

Key to <strong>the</strong> subfamilies<br />

1a. Flowers zygomorphic; corolla <strong>of</strong> free petals; inflorescences usually racemose.................……...……2<br />

1b. Flowers actinomorphic; corolla <strong>of</strong> connate petals; inflorescences usually <strong>of</strong> densely flowered heads<br />

or spikes...............................…………………………………………………..…Mimosoideae<br />

2a. Corolla <strong>of</strong> 5 equal or almost equal petals ……..……………………….... Caesalpinioideae<br />

2b. Corolla with <strong>the</strong> central petal (st<strong>and</strong>ard) elongate, 2 lateral ones connate into a keel <strong>and</strong> 2 lateral<br />

ones smaller .......................…………….………………………….…………………..... Faboideae<br />

24a. Subfamily CAESALPINIOIDEAE<br />

Key to <strong>the</strong> genera<br />

1a.Leaves bipinnate; rachis lacking stipitate gl<strong>and</strong>s; fruits slightly flattened....1.Caesalpinia<br />

1b. Leaves pinnate; rachis with a stipitate gl<strong>and</strong>; fruits cylindrical …...............……..…………2. Senna<br />

1. CAESALPINIA<br />

Trees or erect or clambering shrubs. Stems usually spiny. Leaves bipinnate; pinnae opposite, <strong>the</strong><br />

leaflets opposite or alternate; petioles <strong>and</strong> rachis lacking stipitate gl<strong>and</strong>s; stipules minute to foliaceous.<br />

Flowers unisexual or bisexual, in axillary or terminal racemes; pedicels articulate in <strong>the</strong> distal portion.<br />

Calyx campanulate, 5-lobate; corolla <strong>of</strong> various colors, <strong>the</strong> petals 5, free; stamens 10, <strong>the</strong> filaments<br />

flattened, free, <strong>of</strong> equal length, <strong>the</strong> an<strong>the</strong>rs dehiscent along longitudinal sutures; ovary unilocular,<br />

superior, sessile or short-stipitate, with numerous ovules. Fruit a legume <strong>of</strong> various forms, dehiscent or<br />

indehiscent; seeds solitary or numerous, <strong>of</strong> various forms. A tropical genus <strong>of</strong> about 100 species.<br />

Key to <strong>the</strong> species <strong>of</strong> Caesalpinia<br />

1a. Stipules foliaceous, up to 1.5 cm long, persistent; seeds gray ………………. 1. C. bonduc<br />

1b. Stipules minute, < 5 mm long, deciduous; seeds yellow-orange, brown, or black……...…2<br />

2a. Legumes not spiny……………………………………………………………………...….3<br />

2b. Legumes spiny……………………………………………………………………………..5<br />

3a. Stems spiny; leaflets oblong; legume 2-3 cm broad; seeds oblong ………. 4. C. decapetala<br />

3b. Stems not spiny; leaflets elliptical or broadly elliptical; legume ca. 4 cm broad; seeds almost globose<br />

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