Three new species of Dalechampia (Euphorbiaceae) from Brazil

Dalechampia fernandesii, from Ceará, belongs to sectionTiliifoliae and is related toD. affinis andD. tiliifolia.Dalechampia armbrusteri, of subsectionDalechampia, from Bahia, is close toD. brownsbergensis of Suriname but has well developed resiniferous bractlets.Dalechampia viridissima, from Bahia and Espírito Santo, is an isolated species with the 3-lobed leaves of species in sectionDalechampia subsectionDalechampia but the reduced indumentum and greenish bracts of species in sectionTriphyllae.     

A new yellow-flowered species of Cuphea (Lythraceae) from Bolivia

Cuphea luteola is described from cerrado vegetation in Noel Kempff Mercado National Park, eastern Bolivia. It is assigned to sectionEuandra subsectionOidemation and is distinguished by yellow flowers, linear uninerved leaves, and the inner surface of the floral tube pilose and without vesicles. Several species of the subsection share one or more characters withC. luteola, but none are closely similar.     

A taxonomic study of Salix sections Mexicanae and Viminella subsection Sitchenses (Salicaceae) in North America

The recently recognized western North American sectionsBrewerianae, Mexicanae, andSitchenses in the genusSalix were studied in the field and herbarium. SectionsSitchenses andBrewerianae are here combined and placed under sectionViminella as a subsection. Three species and an additional variety are recognized in subsectionSitchenses and seven species are recognized in sectionMexicanae. Keys for identification and distribution maps are provided.     

Interspecific hybrids ofCoffea canephora andC. liberica

Plant morphology and metaphase I chromosome association of six hybrids betweenC. canephora (subsectionErythrocoffea of sectionEucoffea) andC. liberica (subsectionParacoffea of sectionEucoffea) are described. Between plants, variation in the expression of parental characters was observed and attributed to heterozygosity especially in the liberica parent. Bivalent frequency was high, but comparable to that of earlier reports. Trivalents and quadrivalents, indicating structural hybridity, were observed here for the first time in such hybrids. In spite of their classification in different subsections and apparent hybridization barrier, the two species have considerable chromosomal homology.     

A new species of Urvillea (Sapindaceae) from northwestern Venezuela

The new speciesUrvillea venezuelensis, from northwestern Venezuela, is described, illustrated, and compared to its putative closest relativeU. dasycarpa. Additionally micromorphological characters of pollen grains are described. The new species belongs toUrvillea sectionStenelytron, which is characterized by compressed fruit locules.     

Two new species ofMarasmiellus from eastern Honshu, Japan

Two new species ofMarasmiellus are described from eastern Honshu, Japan:Marasmiellus atrostipitatus sp. nov. (sectionRameales subsectionOpacini) is characterized by a white pileus and a blackish stipe covered with white pruinose to flocculos scales.Marasmiellus brunneocarpus sp. nov. (sectionTricolores) has small brownish basidiomata. Both species occur on dead leaves and twigs inQuercus-Eurya forests.     

A new species of the South American genus Nassauvia (Compositae: Mutisieae) from Chilean Patagonia

Nassauvia coronipappa Arroyo & Marticorena, from Cerro Donoso in eastern Chilean Patagonia, is described and illustrated. It is distinguished by trifid inner involucral bracts and persistent, brief, laciniate-dentate, crown-like pappus incompletely surrounding summit of the achene. The distinctive pappus may be related to selection, in harsh alpine habitats, against dispersal away from nurse sites.Nassauvia coronipappa belongs to subgenusNassauvia. It is seen as a relict member of an independent line of evolution, whose closest affinities are with sectionNassauvia of that subgenus.     

Seed morphology ofEuphorbia sectionTithymalopsis (Euphorbiaceae) and related species

Light and scanning microscopies were used to evaluate the sectional boundary of 17 species included by various authors inEuphorbia sectTithymalopsis. Based on seed shape, surface ornamentation, and mucilage formation, five seed morphological types were recognized in North American sectionTithymalopsis and related species. These results did not provide added support for recent treatment of the sectTithymalopsis s.s. However, a close relationship was suggested among species of theTithymalopsis subsectionCorollatae. In addition, including species from subsectionsInnocuae, Ipecacuanhae, andSphaerorhizae within sectTithymalopsis could not be justified, based on seed morphological data.     

Isolation and identification of (2S)-2-amino-5-chloro-4-hydroxy-5-hexenoic acid from anAmanita of the sectionRoanokenses (Amanitaceae)

A chlorine-containing non-protein amino acid which was recently discovered from the fruit bodies ofAmanita gymnopus (2S)-2-amino-5-chloro-4-hydroxy-5-hexenoic acid, was isolated and crystallized for the first time from the fruit bodies of an unknown member ofAmanita belonging to the sectionRoanokenses, subsectionSolitariae. The results of elementary analyses, determination of optical rotations,¹H- and¹³C-NMR-spectra, and some chemical reactions supported an earlier proposed structure.Part 24 in the series Biochemical studies of nitrogen compounds in fungi. for Part 23, see Hatanaka, S. I. et al. 1994. this journal35: 391–394.     

The taxonomy ofVaccinium sectionHemimyrtillus

In view of their awnless stamens and pseudo-10-loculed berries borne on short racemes several NE Asian species ofVaccinium (includingV. hirtum, V. smallii, V. versicolor, andV. yakushimense) were transferred toVaccinium sectionCyanococcus by Sleumer (1941). Subsequently, however, Stevens (1969) and Vander Kloet (1972, 1981) argued on the basis of further study that these taxa should be transferred instead to sectionHemimyrtillus. Phenetic analyses of data from representatives of sectionsCyanococcus andHemimyrtillus, including NE Asian taxa transferred by Sleumer, demonstrate the distinctness of the two sections and support the assignment of the NE Asian taxa to sectionHemimyrtillus. A revised taxonomic treatment and key to the species ofVaccinium sectionHemimyrtillus is provided.     

A new section of Protium from the neotropics. Studies in neotropical Burseraceae XIII

Protium sectionPepeanthos, a neotropical group of nine species ranging from Costa Rica to the southern perimeter of Amazonia, is described, as are the group's five new species:P. calendulinum, P. gallosum, P. pecuniosum, P. retusum, andP. urophyllidium. Keys are provided to flowering and to fruiting material. The new section is characterized by a milky resin; lateral leaflet pulvinuli inconspicuous or absent; style short-branched and the stigmas caudiculate and spiculate; and the cotyledons plano-convex.     

A taxonomic study of Salix section Cordatae subsection Luteae (Salicaceae)

Salix sectionCordatae subsectionLuteae includes 10 taxa and occurs in most of North America. The taxa are here treated as four species, one with six varieties and another with two varieties. Six new combinations are proposed underSalix eriocephala.     

A new species of penstemon (Scrophulariaceae) from southwestern Utah

Penstemon ammophilus, an endemic to Canaan Moutain in Washington Co., Utah, is described and illustrated. On the basis of anther characteristics it is placed in sectionGlabri, seriesVirgati, where it nearly links the group to sectionCristati. It is distinct from all the species of both sections with its peculiar papillose-glandular pubescence.     

Veronica allahuekberensis (Scrophulariaceae), eine neue Art aus der Türkei

Veronica allahuekberensis A. Öztürk, spec. nova, probably endemic to the Allahuekber mountain in N.E. Anatolia, belongs toV. orientalis group of sectionVeronica and resemblesV. cuneifolia D. Don subsp.cuneifolia, endemic to S.W. Anatolia.

     

Molecular phylogeny of the genus<Emphasis Type="Italic">Hypericum</Emphasis> (Hypericaceae) from Korea and Japan: evidence from nuclear rDNA ITS sequence data

As part of our ongoing phylogenetic study of genusHypericum, nuclear ribosomal DNA internal transcribed spacer sequences were analyzed for 36 species ofHypericum as ingroup and two species ofThornea as outgroup. This sampling included most of the previously described species from both Korea and Japan. The ITS phylogeny suggested that the surveyedHypericum species belong to a monophyletic section,Trigynobrathys, and a polyphyletic section,Hypericum. In addition, two monotypic sections,Sampsonia andRoscyna, were identified. Members of sectionHypericum occur in four different lineages worldwide, which imply at least four independent origins. The Korean and Japanese species of sectionHypericum form a monophyletic group, except forH. vulcanicum. Instead, that particular species belongs to a distinct monophyletic group withH. scoreri andH. formosa from other geographic areas, and is a sister to sectionTrigynobrathys. The Korean and Japanese species of sectionTrigynobrathys show a monophyletic origin.H. sampsonii is now recognized as a distinct section rather than being a member of sectionsHypericum orDrosocarpium, as had been indicated previously. Our results differ somewhat from those of recent morphological and cytological studies. The phylogenetic relationships among Korean and Japanese species have now been mostly resolved via ITS phylogeny.     

Penstemon pinorum (Scrophulariaceae), a new species from Utah

Penstemon pinorum, from the Pine Valley Mountains of southwestern Utah, is described and illustrated. It is compared morphologically and ecologically to other members of sectionCristati.     

Two new species of Senecio section Palmatinervii (Asteraceae) from eastern Mexico

Two closely related new species,Senecio grimesii andS. marquezii, belonging to the sectionPalmatinervii are described, illustrated, and compared to their nearest relative,S. heterogamus. An erratum to this article is available at .     

Viola stoloniflora (Violaceae), a new species from the Ryukyus

Viola stoloniflora Yokota et Higa (Violaceae) is newly described from Okinawa Island, the Ryukyus. This species is characterized by the procumbent stolons, the almost round leaf blades, the densely pilose petioles, the ebarbate white petals with violet veins, and the chromosome number of 2n=22. The present species belongs to Sect.Nomimium, Subsect.Serpentes and is closely related to theV. iwagawai group of Sect.Nomimium, Subsect.Adnatae.     

Notes on new Agaricales of Japan 1

Three new species of Agaricales are described and illustrated from eastern Honshu, Japan:Collybia effusa sp. nov. (sectionLevipedes), forming a distinctly sulcate-striate pileus and distant lamellae, was found on dead twigs ofCryptomeria japonica andCallicarpa japonica; Collybia macrosperma sp. nov., forming cylindrical-fusoid, relatively large-sized basidiospores and whitish basidiomata densely covered with fine, soft hairs, was found on dead fallen twigs in aCarpinus andQuercus forest:Marasmiellus, gregarius sp. nov (subsectionRamealini of sectionRameales), forming small, pale colored pilei and diverticulate cheilocystidia, was found on dead twigs ofHydrangea involucrata andTrachelospermum asiaticum.