Taxonomic studies in the Miconieae (Melastomataceae). VI. Miconia santanana,a new species from Hispaniola

Miconia santanana, which occurs in broad-leaved forests along streams of pineland habitats in the Cordillera Central of the Dominican Republic, is described and illustrated. It is compared withM. ferruginea andM. adenocalyx, two presumed close relatives withinMiconia sect.Chaenopleura. Eco-geographic characterizations and a key are presented for these three species.     

A new species of Miconia (Melastomataceae, Miconieae) from northeastern Brazil

Miconia caiuia occurs only in the highly endangered submontane moist forests in the states of Alagoas, Pernambuco, and northern Bahia, Brazil. It belongs to Miconia section Miconia subsection Secundiflorae. This new species can be distinguished from other species in this subsection by the lepidote-stellate trichomes on young branches, petioles, inflorescences and hypanthia, leaves with suprabasal nerves and wrinkled/auriculate bases, abaxial leaf surfaces with only sparse trichomes, a 5-locular ovary, and large mature fruits (10–13?×?12–15 mm) with up to 15 seeds, which are 2.5–3.5 mm long.     

Miconia becqueri,a new species of Miconia (Melastomataceae) with strongly four-lobed ovaries from the Sierra Maestra,Cuba

A new species of Miconia belonging to a clade diagnosed by strongly four-lobed ovaries/hypanthia and elongated calyx teeth flattened parallel to the floral radii, i.e., the Calycogonium hispidulum complex, endemic to the Sierra Maestra of eastern Cuba, is described, illustrated, and compared with related Cuban species. The discovery of Miconia becqueri brings to 15 the number of recognized species of this complex, seven of which occur in Cuba (if Clidemia barbeyana is conspecific with C. wrightii).     

Miconia atlantica, a new species of Melastomataceae from the eastern mountains of Brazil

A new species of Miconia from the mountains in the Atlantic Forest of eastern Brazil is presented here. Miconia atlantica has been collected in the states of São Paulo and Espírito Santo. It belongs to section Glossocentrum and can be recognized among others species in this section by the leaves with acute bases, an indumentum consisting of stellate trichomes moderately covering the abaxial surface of mature leaves, glomerulate inflorescences, and stamens with unappendaged connectives. Marsupiform domatia were found in São Paulo populations.     

Three new mesoamerican species of Miconia (Melastomataceae)

Miconia centrosperma andM. santaritensis from Panama, andM. stevensiana from Honduras, Nicaragua and Costa Rica, are described, illustrated, and compared with their presumed relatives.     

New Melastomataceae from Peru and Bolivia

The following new species of Melastomataceae from Peru and Bolivia are described:Tibouchina wasshausenii, Miconia rimachii, M. boomii, M. histothrix, M. thysanophylla, and Topobea pascoensis.     

Two new species of <Emphasis Type="Italic">Miconia</Emphasis> (Melastomataceae,Miconieae) from the Brazilian northern border and adjacent French Guiana

Two new species of Miconia from northern Amazonia area described. Miconia amapaënsis has been collected in the Brazilian state of Amapá and in nearby locations in northern Pará and southern French Guiana. It has remarkable seeds, with both the appendix and seed coat covered with long papillae. Miconia forzzae has been collected on the Brazilian side of the Neblina Massif, in the Brazilian state of Amazonas, close to the border with Venezuela. It has 4-merous flowers, with a terete hypanthium, yellow stamens, the ovary apex with unbranched trichomes, and a punctiform stigma. This species may be endangered, considering its narrow distribution, and the fact that it was collected between 2000 and 2100 m elevation in an isolated mountain range with no neighboring mountains with similar height, but we assess its conservation status as “data deficient”, due to a lack of knowledge on the situation of the populations and the number of individuals.     

Four new species of Smilax (Smilacaceae) from southeastern Asia

Described as new areSmilax biumbellata of the affinity ofS. nervomarginata,S. siamensis of the affinity of 5.perfoliata, and two others inSmilax sect.Macranthae:S. inversa andS. pachysandroides.Smilax inversa (characterized by strongly deflexed leaves and inflorescences on zigzag stems) andS. pachysandroides (with subsessile leaves on low simple stems) show no close resemblance to any previously known species of the section.     

Three new species of melastomataceae from the southeastern Atlantic Forest of Brazil

Three species are described here that occur in montane and high-montane forests in Southeastern Brazil.Miconia shepherdii belongs to sectionGlossocentrum and occurs on the Serra da Mantiqueira, on the border between the states of São Paulo, Minas Gerais, and Rio de Janeiro.Miconia kollmannii belongs to sectionHypoxanthus (formerChaenanthera) and occurs in the state of Espírito Santo.Ossaea suprabasalis was also collected in the state of Espírito Santo.     

Five new species of Solanum section Geminata (Solanaceae) from South America

Five new species of South AmericanSolanum are described:S. morii from French Guiana,S. superbum andS. tumescens from Bolivia,S. platycypellon from southern Bolivia and northern Argentina andS. gertii from southeastern Brazil. An illustration and distribution map for each species is provided and relationships to close relatives are discussed.     

Two shrubby novelties in Eriogonum (Polygonaceae) from the deserts of Utah and Arizona

Two desert shrubs belonging toEriogonum subgen.Eucycla sect.Corymbosa are described from southern Utah and northern Arizona.Eriogonum mortonianum, endemic to red clay hills southwest of Fredonia, in extreme northeastern Mohave County, Arizona, is most closely related toE. smithii, a species endemic to the San Rafael Desert of Emery County, Utah, but differs in having wider leaves, a much more branched inflorescence, and smaller, pale-yellow or white flowers.Eriogonum leptocladon var.papiliunculi, found in central Garfield and eastern Kane counties, Utah, southward into northern Coconino and Navajo counties, Arizona, is distinguished from var.leptocladon by its white flowers and from var.ramosissimum by its glabrous stems.     

Notes on melastomataceae of the guianas

New species of Melastomataceae from the Guianas are described in the genera Adelobotrys (Adelobotrys ayangannensis) and Clidemia (Clidemia ayangannensis, C. granvillei). Davya crassiramis Naudin is transferred as Meriania crassiramis, Tschudya pulverulenta DC. is given the new name Miconia aliquantula, and Henriettella venosa Gleason is transferred as Clidemia venosa.     

Three new species and a revised key to species of Oxalis section Polymorphae (Oxalidaceae)

Three new species of Oxalis sect. Polymorphae are here described and illustrated: Oxalis artemioides, O. calcicola, and O. monochasiata. These species have narrow geographic distributions, each being known from just one location. Oxalis artemioides differs from other species of the section by the glabrous stem, narrow terminal leaflets (8–10.5 × 2 mm), and inflorescences with elongated dichasial branches bearing flowers only in the distal portion. Oxalis calcicola differs from other species by having the young stem with adpressed-retrorse trichomes, inflorescences shorter than adjacent leaves, short dichasial branches (0.5–3 mm long) with flowers densely grouped along the entire length, and glabrous pedicels. Oxalis monochasiata is remarkable because of its monochasial inflorescence and the two-ovulate carpels, both features unique within Oxalis sect. Polymorphae. The new species are compared to similar species of the section, and information on distribution and habitat, phenology, and conservation status according with IUCN criteria are provided. Geographic distribution maps, lists of examined materials and an identification key for species of this section are also presented.     

Dos especies nuevas de Borreria (Rubiaceae) y sinopsis de las especies de Bolivia

Two new species are described, Borreria cerradoana and B. velascoana, from Bolivia and Brazil, and a new combination is made, B. spinosa var. minima. Through an identification key, all 28 species of Borreria for Bolivia are recorded, and comments on geographical distribution and habitat are provided. Borreria brachystemonoides, B. poaya, and B. tenera are confirmed as new records for the country.