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Pedicularis contorta var.rubicunda, endemic to north-central Idaho and western Montana, is formally described and illustrated. Morphological and cytological comparisons are made with the two previously described varieties ofP. contorta. Specimens appearing morphologically intermediate between var.contorta and var.rubicunda are also examined.
Scanning electron microscopy was used to examine foliar surface features such as trichome types and the micro-relief formed by cell contours, cuticular patterns, and epicuticular wax in the genusCarya. The fourteen taxa native to Mexico and eastern United States were sampled throughout their geographical ranges, and are represented here by specimens that include segregate taxa, interspecific hybrids,...
A general outline of the geographical, geological, pedological, and climatic conditions of the Sierra Parima is followed by a description of the natural vegetation in the Venezuelan and Brazilian sections of this mountain range, based on the collections and field experience gathered by the authors during the last 15 years. Special attention is devoted to the savanna vegetation of this upland region,...
Four new species and one new variety of Rubiaceae from French Guiana are described:Psychotria alloantha, P. cypellantha, P. squamelligera, P. viridibractea, andSipanea ovalifolia var.villosissima.
Lopholejeunea erugata is provided as a new name forPtychocoleus inermis Steph., based on examination of the type and one additional collection. Transfer of the name ofP. inermis toLopholejeunea is impossible due to the existence ofL. inermis Steph., a very different species from New Guinea.Lopholejeunea erugata is characterized by the presence of a clavate perianth lacking keels or other ornamentation,...
Two heretofore unrecognized species ofMyrceugenia are transferred to the genus. Both are calyptrate, a condition until now unknown in the genus. The differences betweenMyrceugenia and other calyptrate genera of the Myrciinae are indicated. The calyptrate species ofMyrceugenia are hypothesized to be only distantly related to each other, but both show close morphological similarity to certain non-calyptrate...
Heterosmilax, a small southeastern Asiatic genus in the Smilacaceae, comprises 11 species in two sections, includingH. micrandra, which is described as new from Hainan, China. These taxa are taxonomically discussed, described, illustrated, and a key is provided to differentiate them.
One new species,Astragalus tiehmii, and two new varieties,A. convallarius var.margaretae andA. oophorus var.lavinii, are described from Nevada; the relationships of each are discussed and the first is illustrated. Two new combinations,A. eurylobus (Barneby) Barneby andA. serenoi var.shockleyi (M. E. Jones) Barneby are proposed and defended. A new species,A. bryogenes, is described from high Andean...
Calathea libbyana from Napo Province, Ecuador, is described. It belongs to the dimorphic-bracted species-group ofCalathea seriesComosae. It is in cultivation under the cultivar name ‘Windows’, which refers to its distinctive leaf pattern with pale, semi-translucent markings.
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.)...
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