Crinum, Crinum asiaticum

This huge member of the Amaryllis Family (not a lily), Crinum asiaticum grows
in massive, chest-high clumps and if watered properly can flower through a long season.
It's often found at old haciendas. An especially large form with broader, undulating
leaves and even larger flowers is known as St.-John's-lily -- it's the variety sinicum.
Heliconia or Wild Plantain, Heliconia
In humid, tropical, lowland Mexico heliconias grow weedily in
marshes and ditches but in the Yucatan they survive only where there's an uncommon supply
of water, or someone waters them assiduously. Heliconias are members of the Banana Family,
as their broad, glossy leaves indicate. Rarely, especially outside fancy hotels, you find
similar Travelers-Trees, Ravenalas, with similar leaves, except that the leaves
are arranged in a single plane. Heliconia leaves arise haphazardly, as at the right.
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Hoja Santa, Piper auritum
Crush the large leaves of this plant and you'll never forget it,
because of its very spicy odor. In many parts of lowland, tropical Mexico where this small
tree grows wild, people wrap their tamales in Hoja Santa leaves before cooking them. The
slender, white, pencil-like items are spikes of very tiny, very simple, very
packed-together flowers. Note how the bases of the large leaves are lobed, or
"cordate."
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Madagascar Periwinkle, Vinca rosea
This
erect, everblooming herb or subshrub growing one to two feet high is so common in some
places that you might think it is a native wildflower. However, it grows throughout the
tropics worldwide, as its name suggests. There's a white variety, too. The plant is very
closely related to the purple-flowered periwinkles found so commonly in North America and
Europe. Those periwinkles, however, are tailing and vinelike, and their corolla tubes are
only about half as long as this species'.
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