New combinations in Hawaiian Chamaesyce (Euphorbiaceae)

Chamaesyce is accepted at the genus level for the Hawaiian taxa. The following new combinations are made:C. celastroides var.laehiensis, C. celastroides var.tomentella, C. rockii var.grandifolia, C. skottsbergii var.vaccinioides, andC. sparsiflora.     

New taxa and combinations in Malvastrum A. Gray (Malvaceae: Malveae)

The genusMalvastrum A. Gray is interpreted to include 22 taxa in 14 species. Seven taxa are here described as new, namely:M. americanum var.stellatum,M. tomentosum subsp.pautense,M. bicuspidatum subsp.campanulatum,M. bicuspidatum subsp.oaxacanum, M. bicuspidatum subsp.tumidum var.tumidum, M. bicuspidatum subsp.tumidum var.glabrum, andM. coromandelianum subsp.fryxellii. In addition, two new combinations are proposed, namely:M. tomentosum andM. coromandelianum subsp.capitato-spicatum.     

A new name and new combinations in Campomanesia and Pimenta (Myrtaceae)

One new name is proposed and eleven new combinations are made inCampomanesia andPimenta. Lectotypes are selected forC. eugenioides var.desertorum, C. phaea, andP. racemosa var.hispaniolensis, var.ouza, and var.terebinthina.     

Taxonomic and nomenclatural notes on west Indian hypnaceae

Taxonomic investigations on the West Indian Hypnaceae have resulted in the following new taxa,Taxiphyllum gallorum, Ectropothecium aquaticum, andIrelandia (forIsopterygium robusticaule). Vesicularia in the West Indies is treated as a single species with four varieties,V. vesicularis var.vesicularis, var.rutilans (Brid.) comb. nov., var.portoricensis (Brid.) comb. nov., and var.crassicaulis (Mitt.) comb. nov.Chryso-hypnum is segregated fromMittenothamnium; the combinationC. diminutivum (Hampe) Buck is made.     

New taxa and combinations in Agastache (Lamiaceae)

Diagnoses are given for the following new taxa:Agastache eplingiana, A. micrantha var.durangensis, A. pallida var.coriacea,A. pallidiflora var.gilensis andA. palmeri var.leonensis. Five new combinations are made.     

Morphologic variation and classification of the North American Aristida purpurea complex (Gramineae)

The morphology of the Purpureae Group of North AmericanAristida is assessed by principal components and statistical analyses. Long considered a complex of about eight species, a mosaic of intergrading phenetic forms is revealed and the complex is reduced to one species with seven varieties. The taxa that are recognized areAristida purpurea var.purpurea, var.nealleyi (comb. nov.), var.curvifolia (comb. nov.), var.parishii (comb. nov.), var.wrightii (comb. nov.), var.fendleriana, and var.longiseta. A key and synopses for the varieties are provided.     

New taxa in Pectis (Compositae: Pectidinae) from Mexico and the southwestern United States

Pectis minutiflora,P. papposa var.grandis, andP. purpurea var.sonorae are described as new. A new combination,P. purpurea var.lancifolia also is included. Chromosome counts (n = 12) are reported forP. papposa var.grandis andP. purpurea var.sonorae.     

New species and varieties of Connarus (Connaraceae) from Brazil,Venezuela, and adjacent countries

Four new species (Connarus celatus, C. marlenei, C. portosegurensis andC. rigidus) and four new varieties (Connarus erianthus var.pedicellatus,C. erianthus var.stipitatus, C. perrottetii var.rufus, andC. venezuelanus var.orinocensis) are described and illustrated, in preparation for the forthcoming Monograph of the Connaraceae in Flora Neotropica.     

New combinations for Panicum subgenus Panicum and subgenus Dichanthelium (Poaceae) of the Southeastern United States

Twenty-two new varietal combinations are made for the treatment of the genusPanicum of the Southeastern United States. The following 3 new combinations are made in the subgenusPanicum:Panicum rigidulum var.elongatum, P. rigidulum var.pubescens, P. rigidulum var.combsii. The following 19 new combinations are made in the subgenusDichanthelium:P. strigosum var.glabrescens P. strigosum var.leucoblepharis, P. dichotomum var.roanokense, P. dichotomum var.lucidum, P. dichotomum var.ramulosum, p. dichotomum var.mattamuskeetense, P. dichotomum var.yadkinense, P. ensifolium var.curtifolium, P. chamaelonche var.breve, P. portoricense var.nashianum, P. acuminatum var.fasciculatum, P. acuminatum var.unciphyllum, P. acuminatum var.columbianum, P. acuminatum var.lindheimeri, P. acuminatum var.densiflorum, P. acuminatum varlongiligulatum, P. acuminatum var.leucothrix, P. ovale var.pseudopubescens, andP. ovale var.villosum.     

New taxa from the Venezuelan Guayana

Seven new taxa, mainly from the Guayana Highland of Venezuela, are described. These include four new species (Cottendorfia atrorosea, Navia emergens, Navia ovoidea, and Pitcairnia nematophora) and one new variety (Cottendorfia brachyphylla var. angustior) of Bromeliaceae, one new species (Swartzia cowanii) of Leguminosae, and one new species (Marlierea pudica) of Myrtaceae.     

Dragma Hippomanicum III: Novitates Californicae

Two new taxa are described from California:Astragalus (sect.Flexuosi)shevockii from the Sierra Nevada in Tulare County representing a new subsect.Shevockiani; andA. lentiginosus var.piscinensis from an alkaline spring in Mono County. Rediscovery in Nevada of long-lostA. lentiginosus var.sesquimetralis and a new station for the same in Inyo County, California are reported.     

A synopsis of the South American taxa of Fabronia (Fabroniaceae)

The genusFabronia in South America is found to represent five taxa:F. ciliaris var.ciliaris, F. ciliaris var.wrightii,F. ciliaris var.polycarpa,F. macroblepharis andF. jamesonii. Synonymy, brief discussion, illustrations and a key are provided.Fabronia enervis Herz., hom. illeg., is the basis for the new genusMahua.     

Some ascomycetes (fungi) occurring on tropical ferns

The new combination Eudimeriolum cyathearum is proposed for Dimeriella cyathearum; the fungus is found on pinnae of Cyathea caudata in the Philippine Islands. Dimeriella polypodii is described from scales on pinnae of Polypodium montigenum and P. madrense in Mexico. Bioscypha cyatheae, on pinnae of Cyathea sp. in Costa Rica, is redescribed. Bioscypha pteridicola is described from pinnae of Cnemidaria uleana var. abitaguensis in Colombia. Crocicreas sessilis is described from pinnae of Cyathea divergens var. tuerckheimii in Mexico.     

Studies in the genus Physaria (Cruciferae)

Building upon a taxonomic treatment ofPhysaria published in 1939, an extension of information concerning the genus is presented. Comments on misapplication of the nameP. acutifolia Rydb., a new trichome type forPhysaria, and a high elevation species in Colorado are accompanied by the presentation of four new taxa. These areP. alpina, P. eburniflora, P. lepidota, andP. newberryi var.racemosa.     

Notes on neotropical vaccinieae (Ericaceae). VI. New species from the cordillera vilcabamba and adjacent Eastern Peru

Thibaudia dudleyi var.dudleyi and var.pseudostellata,Demosthenesia cordifolia,D. oppositifolia, andD. vilcabambensis from the Cordillera Vilcabamba, andCavendishia sirensis from the Cerros del Sira in eastern Peru are described and illustrated. The Cordillera Vilcabamba seems to be the center of distribution for the genusDemosthenesia.     

Synonymy in peperomia berteroana (Piperaceae) results in biological disjunction between Pacific and Atlantic oceans

Placing Peperomia berteroana of the Juan Fernandez Islands in the Pacific Ocean in synonymy with P. tristanensis of Tristan da Cunha in the Atlantic Ocean results in a species with a wide geographical disjunction of more than 5000 km. Morphological data indicate that these taxa are best treated as subspecies (P. berteroana subsp. berteroana and P. berteroana subsp. tristanensis).