Vines and Climbing Plants of Puerto Rico and the Virgin Islands

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40 Vines and Climbing Plants of Puerto Rico and the Virgin Islands
Vines and Climbing Plants of Puerto Rico and the Virgin Islands 41 pinnules puberulent, oblong, elongate, with prominent venation, the apex obtuse to rounded. Sporangia on the lower surface of digitiform marginal projections of the basal secondary pinnules or on fertile pinnae, markedly dissectedlobed; indusium forming a small pocket, which opens toward the apex of the leaf blade. 8. Family SELAGINELLACEAE 1. SELAGINELLA Phenology: Found in fertile condition throughout the year. Status: Exotic, naturalized, uncommon. Distribution: Native to Japan, cultivated and apparently naturalized in several localities in Puerto Rico. Widely cultivated in tropical and subtropical areas. Public forest: Río Abajo. Terrestrial herbs, usually creeping or decumbent, rarely erect or clambering. Leaves numerous, microphyllous, with a single vein; monomorphic and spirally arranged or dimorphic and distichous. Sporophylls in sessile spikes, compact or separated; sporangia axillary on the sporophylls; spores dimorphic. A genus of 600-700 species, mostly tropical. 1. Selaginella willdenovii (Desv. ex Poir.) Baker, Gard. Chron. 1867: 783, 950. 1867. Fig. 12. D-G BASIONYM: Lycopodium willdenovii Desv. ex Poir. Clambering herb, 6-10 m in length. Stems brittle, with numerous secondary branches up to 50 cm long, these again branched into short branches with determinate growth, which attain 13 cm long and give the appearance of a 3pinnate, triangular leaf. Primary and secondary branches greenish or with a reddish shade. Leaves oblong-ovate, imbricate and in two layers, the upper layer of leaves ca. 1 mm long, the lower DICOTYLEDONS Key to the families of Dicotyledons layer of leaves 3-4 mm long, the apex obtuse, the base auriculate to subcordiform, sessile. Strobili 1.5-2 cm long, green, at the tips of the tertiary branches. Phenology: Collected in fertile condition in February. Status: Exotic, naturalized, uncommon. Distribution: Native to tropical Asia and Indonesia, introduced in Puerto Rico as an ornamental where it is found to be naturalized (Cayey, El Verde, Río Piedras, and Mayagüez). It has also become naturalized throughout the Neotropics. Public forest: El Yunque. 1a. Plants without leaves or with inconspicuous, minute (< 2 mm long), ovate-triangular leaves........................................................................................................................... Key 1 1b. Plants with well developed leaves (> 5 mm long), simple or compound ........................................ 2 2a. Leaves compound ..................................................................................................................... Key 2 2b. Leaves simple or unifoliolate .................................................................................................. Key 3
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Acelga trepadora ..................
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Wild cucumber .....................
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Vines and Climbing Plants of Puerto Rico and the Virgin Islands

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