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The Cutting Edge
Volume XIII, Number 3, July 2006
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MELIACEAE. Q. Jiménez (INB) & A. Rodríguez
(INB). This contribution accepts 54 spp. of Meliaceae in Costa Rica, representing seven genera.
Former INBio curator Quírico Jiménez is responsible for six of the
genera, current curator Alexánder Rodríguez for Guarea alone.
However, Guarea harbors the majority of spp., with 30, followed by Trichilia
(14 spp.) and Cedrela (4 spp.). The 30 spp. of Guarea distinguished by
Rodríguez is about triple the total previously attributed to Costa Rica, with many of the
additions accruing from the author’s atomization of Guarea glabra Vahl in the
all-encompassing sense of Flora Neotropica monographer Terence D. Pennington
(K). Thirteen Guarea spp. are still undescribed and require provisional names. A
total of 16 spp. of Meliaceae are endemic to Costa Rica, 13 in Guarea (including 10 of the
provisionally named entities) and three in Trichilia. No exotic taxa are treated
formally, but cultivated spp. in the genera Azadirachta, Melia, Sandoricum,
and Toona are mentioned in the family discussion.
MYRTACEAE. F. R. Barrie (MO), B. Holst (SEL), M. L.
Kawasaki (F) & L. R. Landrum (ASU). Fourteen genera of Myrtaceae
are treated in full by these authors, comprising a total of 87 spp. By far the most sp.-rich
genus in Costa Rica is Eugenia (49 spp.), followed distantly by Myrcia (8 spp.)
and Calyptranthes, Plinia, and Psidium (each with 6 spp.).
Eugenia also heads up the list of Costa Rican endemics, with 25 of the 31 spp. total, the
remainder being distributed among Calyptranthes (2 spp.), Marlierea (1 sp.), and
Plinia (3 spp.). Two spp. (one each of Eugenia and Myrcia) bear
provisional names. Two exotic genera, Eucalyptus and Syzygium, are treated
formally on the basis of spp. cultivated on a commercial scale (one in the former genus, two in
the latter). Psidium guajava L. may also be introduced to Costa Rica.
Cultivated spp. of Acca, Callistemon, Melaleuca, and Myrtus
are briefly mentioned in the family discussion. Authorship attributions are as follows:
Holst and Kawasaki are responsible for Calyptranthes, Marlierea, and
Myrcia; Landrum and Barrie for Calycolpus, Pimenta, Psidium,
and Ugni; and Barrie alone for all the rest.
PAPAVERACEAE. A. Soto (INB). INBio roustabout
Armando Soto gets a shot with this small family, and acquits himself very well
indeed. Just two genera are involved, with a total of three spp. (none endemic):
the herbaceous Argemone mexicana L. and the woody Bocconia arborea S. Watson
and B. frutescens L. These are rather weedy plants, quite well known with the
exception of Bocconia arborea, a surprise addition to the flora (though it is rather
tenuously distinguished from B. frutescens). The North American Eschscholzia
californica Cham., sparingly cultivated in Costa Rica, receives mention in the family