Maytenus guyanensis  Klotzsch ex Reissek in Mart.

Occasional evergreen subcanopy tree (15-25 m) with rare individuals reaching canopy proportions. This species appears to have little preference regarding habitat type, being distributed more or less evenly along the sandy coast and throughout the inland primary forest. If anything, it shows a tendency to grow in zones receiving higher than average levels of insolation.

Description: Younger Maytenus trunks are bent and of irregular cross-section, often misshapen and twisted and rarely straight. Frequently, sections of the tree die and new growth occurs in other areas leaving the trunk with abrupt, cut-off ends and thin, relatively young main stems. Trunks of older trees (to 70 cm) tend to less eccentric, while more cylindrical and straight. The bark of small trees is smooth and dark green-black, with finely textured vertical cracking. Older individuals sport grayer, rougher, and pock-marked bark with narrow fissures. Maytenus branches are characteristically long and thin, and they droop under their own weight in an almost willow-like fashion. Leaves (15 cm by 5 cm) are glabrous, simple, and alternately arranged. Elliptically shaped, they end in abruptly-tapering drip-tips. The blades are waxy and thick, and they are arranged in two-tiers along zigzagging twigs. New foliage is produced biannually: in April, and then for an extended period from late September to December. The unobtrusive flowers are small (5 mm in diameter), yellow-green, and born in short, axillary racemes. Each disk-like bud opens into a 5-sepaled, petal-less flower with five yellow stamens and a central pistil set in a green, knob-like gland. Synchronous, universal flower production occurs from late March through June with individual trees often flowering sporadically at other times during the year. Fruits (2 cm by 1 cm) are yellow-brown, club or balloon-shaped capsules supported by short green stalks. When mature, they split longitudinally into halves. Inside, a large and pasty, snow-white aril covers 2 glossy, flat, brown seeds. Fruit shape and size in this species are quite variable. Harvests occur from late July through early October.

Similar Species: Unfortunately, there are many tree species with similar leaves to those of Maytenus. When fertile - as it is to varying degrees for at least eight months of the year - the unique flowers and fruits facilitate the identification of this species. Otherwise, the drooping branches, dark, often blackish bark, and highly irregular, bending bole of this tree are useful distinguishing parameters.

Natural History: Flowers are pollinated by insects (with possible help from the wind) while seeds are dispersed mainly by aril-consuming avifauna.

Distribution: Maytenus can be a locally common component of the sandy coastal zone, where it seems to demonstrate both salt and drought tolerance. The tree also frequents primary forest sites. It occurs on both Costa Rican coasts.

Fruit/Leaf   Leaf