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The Cutting Edge
Volume XIII, Number 4, October 2006
News and Notes |
Leaps and Bounds | Germane Literature |
Season's Pick
CECROPIACEAE (or Urticaceae, if you insist). What, a new Cecropia sp. for Costa
Rica? That indeed appears to be the case, as reported by INB curator Alexánder
Rodríguez, who has positively identified an unusual collection as C. hispidissima
Cuatrec. This would be the sixth Cecropia sp. for the Costa Rican flora. The
material in question, from the Atlantic coastal plain east of Los Chiles (near the Nicaraguan
border), is noteworthy for its dense pubescence of stiff, somewhat irritating setae, covering the
young stems, petioles and leaf-blades. Cecropia hispidissima was previously known from
eastern Panama to Ecuador, and while it may seem odd that a basically South American sp. should
turn up at the northern edge of Costa Rica, we are aware of numerous precedents. Already
this sp. is endangered in Costa Rica, according to Alex, as the discovery site is located in an
area slated to host a potentially devastating mining operation.
MYRSINACEAE. Ardisia eurubiginosa (Lundell) J. F. Morales can now be officially
reported from Costa Rica, having been collected there 10 years ago by the extraparenthetical
authority, who has only recently realized the identity of his specimen. This sp. was already
included hypothetically in Chico’s Manual draft treatment of Myrsinaceae [see
The Cutting Edge 7(1): 3,
Jan. 2000], on the basis of a Panamanian specimen from the Cordillera de Talamanca, just a
stone’s throw from the Costa Rican border. Now we can legally claim it, with a specified
range of 2450–2900 m on the Atlantic slope (and near the Continental Divide) in the eastern
portion of the Talamanca range. Although Ardisia eurubiginosa was synonymized under
A. palmana Donn. Sm. in a recent revision [see
The Cutting Edge 10(3):
9–10, Jul. 2003], Chico reports that it is distinct by virtue of its well-differentiated
petioles, shorter inflorescences, and pink (vs. white or cream) petals.
SABIACEAE. Meliosma dentata (Liebm.) Urb., previously known to range from Mexico to
Nicaragua (and vouchered from the latter country by a single, sterile specimen), has turned up in
Costa Rica. Our only record, collected on 12 October, 1971, is Holdridge 6557 (CR), from
the Pacific slope of Volcán Irazú between Rancho Redondo and Llano Grande. The
indicated locality would suggest an elevational range of ca. 2050–2300 m. According to
INB curator Francisco Morales, who reports this herbarium find, M. dentata differs from
the very similar Meliosma idiopoda S. F. Blake by its larger flowers. Calculating from
Chico’s previous regional treatments of Meliosma [see
The Cutting Edge 10(3):
7–8, Jul. 2003], the sp.-total for Costa Rica now stands at 15.
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