A Field Guide to the Families and Genera of Woody Plants of by Alwyn H. Gentry

By Alwyn H. Gentry

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To comprehend virtually any a part of the tropical rain forest's fabulously complicated internet of lifestyles, one needs to first discover ways to determine a bewildering array of vegetation. Alwyn Gentry's landmark booklet, accomplished earlier than his tragic loss of life in 1993, is the one box advisor to the approximately 250 households of woody crops within the such a lot species-rich area of South America.

As a consummate box researcher, Gentry designed this advisor to be not only accomplished, but in addition effortless to exploit in rigorous box stipulations. in contrast to many box publications, which depend for his or her identifications on plant life and end result which are merely current in the course of sure seasons, Gentry's e-book specializes in characters similar to bark, leaves, and smell which are current year-round. His advisor is stuffed with transparent illustrations, step by step keys to identity, and a wealth of formerly unpublished data.

All biologists, flora and fauna managers, conservationists, and executive officers fascinated about the tropical rain forests will want and use this box guide.

Alwyn Gentry was once one of many world's most suitable specialists at the biology of tropical vegetation. He used to be senior curator on the Missouri Botanical backyard, and was once a member of Conservation International's interdisciplinary speedy evaluate software (RAP) group, which inventories the biodiversity of the main threatened tropical parts. From 1967 to 1993 he gathered greater than 80,000 plant specimens, lots of them new to technological know-how.

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Extra resources for A Field Guide to the Families and Genera of Woody Plants of North west South America : (Colombia, Ecuador, Peru) : With Supplementary Notes)

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A few other families have 3-veined bases but lack the typical cross veins (Delostoma [Big­ noniaceae; Andean]), Strychnos (few shrubby species). Also beware of Mouriri which lacks the typical venation and looks almost exactly like Myrtaceae. IIIBe. ) Monimiaceae - Siparuna, usually puberulous or with lepidote scales; the second genus (Mollinedia) often lacks obvious odor but is characterized by very distinctive leaf with few very separated marginal teeth. Chloranthaceae - Hedyosmum (our only genus) has very charac­ teristic swollen nodes with stipulelike sheath.

Pubescence (if present) of simple trichomes. Rubiaceae - Vine genera have the typical interpetiolar rubiac stipules but these are not always obvious in· many Iiana taxa. Com­ monest liana genus is Uncaria with -paired curved axillary spines. , Arrabidaea, but usually also with some tendrillate 2-foliolate leaves) have simple-leaved species or variants which are 3-veined from base; one hemiepiphytic genus (Schlegelia, which may be a scroph) has uni­ formly simple leaves, strikingly coriaceous and with a characteristic appressed-conical "pseudostipular" axillary bud, and adventitious roots along stem.

Mostly entire-leaved (with apical spine or apicule) but sometimes with a few thickened subterminal teeth; distinctive in the small grayish-sericeous leaves with opposite petioles strongly connected by line or flap of tissue. Columellia (Columelliaceae) (Aphelandra [Acanthaceae]) - A few montane species have con­ spicuously spinose leaf margins. (;lkhornea pearcei ([Euphorbiaceae]) - A monmne cloud-forest taxon with mostly opposite leaves, easily recogriized by the strongly 3-veined leaves with glands in the lQwer vein axils, thus, looking almost exactly like typical alternate-leaved species of the genus.

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