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Studies in capparaceae XXVIII: The quadrella cynophallophora complex

Abstract:

Quadrella (DC.)J. Presl (1825) is a West Indian and Mesoamerican, dehiscent-fruited genus (Capparaceae) of 25 species covered with complex, vanously branched or fused trichomes, was recently resuscitated from the breakup of the New World Capparis L., s.l. Within Quadrella, the lepidote or peltate pubescent complex of Q. cynophallophora (L.) Hutchinson includes two closely related, taxonomically problematic species and subspecies groups: Q. cynophallophora of the West Indies (with outlier populations in Florida and the Yucatan Peninsula) and Q. isthmensis (Eichler) Hutchinson in Mesoamerica. The former includes Quadrella cynophallophora s.s., widespread from the Bahamas through Hispamola to Trinidad; Q. jamaicensis (Jacq.)J Presl, from southern Florida to Hispaniola, Quadrella quintanarooensis Iltis & Cornejo, sp. nov, a local endemic of Cozumel Island and adjoining northeastern Yucatan in Mexico; Quadrella gonaicvensis (Helwig) Hutchinson, a rare species of Hispaniola; and Q. siliquosa (L.) Iltis & Cornejo comb, nov, a montane endemic of Jamaica. From the American Virgin Islands, we describe two juvenile forms, Quadrella cynophallophora f. lincarifolia Iltis, f, nov., and another from Jamaica, transferred from Capparis, Quadrella jamaicensis f. longifolia (Sw) Iltis, comb. nov. The second group of taxa consists of Quadrella isthmensis (Eichler) Hutchinson, which we divide into three subspecies: Q. isthmensis subsp isthmensis of Costa Rica and coastal Panama, Q. isthmensis subsp glabripetala Cornejo & Iltis, subsp. nov., of Panama's Cordillera Central, and Q. isthmensis subsp mexicana Cornejo & Iltis, subsp. nov., disjunct to Mexico's Yucatán Peninsula. The following taxa are lectotypified' Quadrella cynophallophora (L.) Hutchinson, Q. jamaicensis (Jacq.) J. Presl, and Q. isthmensis subsp. isthmensis (Eichler) Hutchinson. Finally, Quadrella siliquosa (L.) Iltis & Cornejo and its synonym Capparis torulosa Sw are both neotypified. Descriptions, keys to taxa, distribution maps and illustrations are provided.