Cornelis C. Berg

A revision of Celtis subg. Mertensia (Ulmaceae)

A revision of the neotropical subgenusMertensia of the ulmaceous genusCeltis is presented. This group is a clear-cut entity characterized by the presence of thorns and/or domatia, as well subspecies and varieties have been recognized. In the present treatment the number of species is reduced to six, including a new and thornless species,C. loxensis. Descriptions of the subgenus and species, a key to species, a list of synonyms, and distribution data are presented.

New taxa and combinations in Moraceae and Cecropiaceae from Central and South America

Taxonomic studies of Moraceae and Cecropiaceae of Central America and the Andean region led to establishment of the following new taxa and combinations in Moraceae: Brosimum multinervium C. C. Berg, Ficus carchiana C. C. Berg, F cotinifolia Kunth var. hondurensis (Standley & L. O. Williams) C. C. Berg, F osensis C. C. Berg, F rieberiana C. C. Berg, Maquira guianensis Aublet subsp. costaricana (Standley) C. C. Berg, Naucleopsis capirensis C. C. Berg, N. herrerensis C. C. Berg, N. humilis C. C. Berg, N. naga Pittier subsp. meridionalis C. C. Berg, N. straminea C. C. Berg, N. ulei (Warburg) Ducke subsp. puberula C. C. Berg, N. velutina C. C. Berg, Pseudolmedia glabrata (Liebmann) C. C. Berg, Sorocea jaramilloi C. C. Berg, S. pubivena Hemsley subsp. oligotricha (Akkermans & C. C. Berg) C. C. Berg, S. pubivena Hemsley subsp. hirtella (Mildbraed) C. C. Berg, S. ruminata C. C. Berg, S. sprucei (Baillon) Macbride subsp. subumbellata C. C. Berg; and in Cecropiaceae: Cecropia annulata C. C. Berg & P. Franco, C. heterochroma C. C. Berg & P. Franco, C. puberula C. C. Berg & P. Franco, C. tacuna C. C. Berg & P. Franco, Coussapoa david-smithii C. C. Berg, and C. villosa Poeppig & Endlicher subsp. polycephala C. C. Berg. For Ficus intramarginalis (Liebmann) Miquel a lectotype is designated. In connection with floristic treatments (Flora Mesoamericana and the Flora of Ecuador), a revision of the genus Cecropia, and less specific studies on Moraceae and Cecropiaceae of the Andean region, several new taxa have been found in the material studied. Some new combinations have to be made in addition to those of Cecropia, Coussapoa, and Pourouma recently published in the Flora of Ecuador (Berg & Franco, 1993).

New species of Ficus (Moraceae) from Brazil

Eight new species from Brazil,Ficus acreana,F. bahiensis, F. duartei, F. duckeana, F. hatschbachii, F. lagoensis, F. laureola, andF. rupicola, are described and illustrated. The new species are compared with other species of the genus.

A new species of Ficus (Moraceae) from Bolivia and Peru

Ficus boliviana is described from Bolivia and Peru, illustrated, and compared with other species in the genus.

Two new species of Pourouma (Cecropiaceae) from South America

Two new species ofPourouma are described, illustrated, and keyed out;P. cordata from Peru and Brazil, andP. montana from Peru.

A new species of Ficus (Moraceae) of uncertain provenance

A new species,Ficus salicaria, is described from material cultivated as ornamental. The material is of uncertain provenance but was probably collected originally in Guyana.

New species of Coussapoa and Pourouma (Cecropiaceae).

Four new species are described and illustrated:Coussapoa fulvescens, C. tolimensis, andC. valaria from Colombia, andPourouma napoensis from Ecuador.