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Gibsoniothamnus L. O. Williams is a genus of 11 species native to Mexico, Central America, and northern Colombia. The species are shrubs or small trees with opposite, entire leaves, tubular corollas, four stamens, 2-locular ovary, and fleshy, indehiscent fruits. Calyces are unlobed, or they may have lateral, triangular or winglike lobes. Most species are epiphytes and appear to be bird pollinated...
Three new species ofMalouetia (Apocynaceae) are described and illustrated:M. amazonica andM. pumila from Brazil andM. gentryi from Peru.Malouetia amazonica grows in inundated igapó forest, whereas the other two are found in non-inundated habitats:M. pumila incampa fechada, andM. gentryi in upland forest.
A new species ofCroton,C. dissectistipulatus, is described from Amazonian Brazil. This species is superficially similar toC. timandroides from northeastern and southeastern Brazil, but differs in having petiolate leaves with glandular margins, persistent stipules, conspicuous racemose inflorescences, staminate flowers having externally glabrous sepals and 3 stamens, and pedicellate pistillate flowers...
Illicium hottense, a new species, is here described from the floristically diverse Massif de la Hotte of southern Haiti. It is compared to related species, especiallyI. ekmanii, with which it has previously been confused.Illicium hottense andI. ekmanii are members ofIllicium subsectionParviflora, a group that comprises four species, all endemic to peninsular Florida (I. parviflorum) or the Greater...
An intellectual biography of Elie-Abel Carrière is presented, including a list of taxa named by him in the gymnosperms. He was the leading authority on gymnosperms in the middle years of the 19th century, and he was also the major French horticulturist of that era. He was also an active proponent of the reforestation of the mountains that began under Napoleon III after many decades of popular resistance.
Eriogonum soliceps, a new species of subg.Eucycla sect.Capitata, is described. It may be readily distinguished from all other taxa of the subgenus by its reduced inflorescence. From its presumed nearest relative,E. mancum, this new species differs in its solitary (vs. 2–5) involucre, presence of a peduncle but no scape, lack of bracts at the base of the involucre, and distinctly pustulose midribs...
Herbertia crosae (Iridaceae) is described from the stony grasslands of northwestern Uruguay. The new species resemblesHerbertia lahue but can be easily distinguished by the narrower leaves, slender habit, the smaller pale lilac flowers, the presence of yellow spots at the base of the tepals, the red, adpressed hairs along the filament column, the presence of filaments free at the apex, the channeled...
Fruit specimens representing five taxa of the genusCyrtostachys were examined histologically in order to characterize the pericarp anatomy of the monogeneric subtribe Cyrtostachydinae (tribe Areceae, subfamily Arecoideae), as part of an ongoing survey of the family. The pericarp in this genus can be characterized by a combination of papillate epidermis, heavy layer of tanniniferous/pigmented cells...
Schefflera aurata, a new species of Araliaceae endemic to the restinga forests of southern Bahia, Brazil, is described and illustrated. It is probably related toS. morototoni, but can be distinguished by leaflets with strongly coriaceous blades, cuspidate apices, goldensericeous indument of the abaxial surfaces, partial inflorescences with 8–12 subsessile flowers, elongated ovaries, and distinctly...
A taxonomic study is presented for the South American orchid genusBifrenaria Lindl., which is characterized, within the subtribe Maxillariinae, by four-angled, unifoliate pseudobulbs, plicate leaves, and by flowers bearing a conspicuous spur and a pollinarium usually with a forked stipe. We considerBifrenaria a monophyletic group includingAdipe (=Stenocoryne),Cydoniorchis, andBifrenaria sensu stricto...
A new genus ofPolygonaceae subfam.Eriogonoideae is established for what has long been known asEriogonum puberulum. NamedJohanneshowellia in honor of the late John Thomas Howell (1903–1994), a new combination,J. puberula, and a new species,J. crateriorum, are established. The common name Howell's-buckwheat is proposed for the group. The new genus differs from other members of the subfamily in having...
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