A new variety of galium arkansanum (Rubiaceae) endemic to the Ouachita Mountains of Arkansas

A linear-leaved, unicostate phase ofGalium arkansanum Gray with pubescent corollas and the abaxial midvein of the leaves glabrous is segregated from the species as var.pubiflorum. It is presently known in the pure form only from the Ouachita Mountains in Montgomery County, Arkansas     

Hedyotis ouachitana (Rubiaceae): A new species from the Ouachita Mountains of Arkansas and Oklahoma

AHedyotis from the Ouachita Mountain region of Arkansas and Oklahoma is superficially similar toH. longifolia (Gaertn.) Hook., but differs consistently in pubescence of the inner corolla and pubescence of the lower stem. It occupies a different habitat and apparently does not hybridize withH. longifolia var.longifolia when the two occur in close proximity. It is described asH. ouachitana.     

Development of a satellite-based hazard rating system for Dendroctonus frontallis (Coleoptera: Scolytidae) in the Ouachita Mountains of Arkansas

The southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Scolytidae), is the most damaging forest insect pest of pines (Pinus spp.) throughout the southeastern United States. Hazard rating schemes have been developed for D. frontalis, but for these schemes to be accurate and effective, they require extensive on-site measurements of stand attributes such as host density, age, and basal area. We developed a stand hazard-rating scheme for several watersheds in the Ouachita Highlands of Arkansas based upon remotely sensed data and a geographic information system. A hazard model was developed using stand attributes (tree species, stand age and density, pine basal area, and landform information) and was used to establish baseline hazard maps for the watersheds. Landsat 7 ETM+ data were used for developing new hazard maps. Two dates of Landsat imagery were used in the analyses (August 1999 and October 1999). The highest correlations between hazard rating scores and remotely sensed variables from either of the dates included individual Landsat 7 ETM+ bands in the near- and mid-infrared regions as well as variables derived from various bands (i.e., Tasseled cap parameters, principal component parameters, and vegetation indices such as the calculated simple ratio and normalized difference vegetation index). Best subset regression analyses produced models to predict stand hazard to southern pine beetle that consisted of similar variables that resembled but were more detailed than maps produced using inverse distance weighted techniques. Although the models are specific for the study area, with modifications, they should be transferable to geographically similar areas.     

内蒙古大兴安岭白头翁属一新变种

描述了毛茛科白头翁属一新变种——裂萼细叶白头翁(Pulsatilla turczaninovii Kryl.et Serg.var.fissasepalum)。本变种与原变种细叶白头翁的主要区别为,外轮萼片有不等深度、不等大小的二深裂,中裂片最大,两侧裂片大小不等。     

Diversity of litter-dwelling beetles in the Ouachita Highlands of Arkansas, USA (Insecta: Coleoptera)

A survey of forest litter-inhabiting Coleoptera was conducted in deciduous forests of the Ouachita Mountains in western Arkansas during 1991–1992. A total of 102 Berlese samples were collected, weighed, and processed during the 12-month study. From 741kg of sifted forest litter, we counted and sorted 10663 adult beetles representing 46 families and 400 species. The family Staphylinidae was taxonomically and numerically dominant, comprising 46% of species and 63% of individuals. Problems in assessing species richness of forest litter Coleoptera faunas result from a lack of taxonomic revisions, occurrence of sex-limited diagnostic characters, and inadequate information about larval-adult species associations and life histories. A randomized species accumulation curve indicated that species addition ranged from 14 species per sample during the first ten samples to 1.5 species per sample during the final ten. Richness estimates generated from the empirical data ranged from 434 species (Michaelis–Menten and Coleman richness estimators) to 590 species (second order jacknife). The area sampled is biogeographically significant because it harbors numerous habitat- restricted species that are endemic to the Ouachita Mountains or the Interior Highland region, as well as disjunct populations of species that are also found in the southern Appalachian Mountains. Deciduous forest habitats of the Ouachita Mountains, particularly beech-maple riparian forest, should be given special consideration in forest conservation planning because of their significance as refugia for these and other endemic and disjunct arthropods.     

A new variety of coreopsis mutica (Compositae) from Mexico

Coreopsis mutica var.simplicifolia is described from the state of Guanajuato in Mexico. The new variety is distinguishable by its simple lanceolate to linear-lanceolate leaves. In addition, var.simplicifolia is al lopatric with other C.mutica and has a distinctive leaf flavonoid chemistry. The chromosome number of the variety is 2n = 56.     

中国木兰科木兰属一新变种

对原产湖北五峰的红花玉兰新变种多瓣红花玉兰（Magnolia wufengensis var. multitepala L.Y.Ma et L.R.Wang）作了描述。新变种与红花玉兰原变种(M. wufengensis var. wufengensis)花色相近,整个花被片内外均为红色,内面略淡。主要区别在于：新变种花被片12、15、18、24;花被片阔倒卵状匙形、倒卵状匙形或窄倒卵状匙形;花色浓淡不同植株间有深红、红、浅红之差别;自然状态下可育,蓇葖果发育良好。     

四川女贞属(Ligustrum)一新变种

发表了女贞属一新变种     

A new variety of Senna birostris (Leguminosae, Caesalpinioideae) from Argentina

Senna birostris previously included seven varieties distributed mostly above 2000 m, in the Andes, between the equator and 33°S. According to Irwin & Barneby,Senna birostris var.hookeriana was the only variety in Argentina, distributed from the Jujuy province to the San Luis province. New observations led us to identify two distinct entities that have gone under this taxon. The new variety,Senna birostris var.jallaguensis, is described from Argentina and illustrated herein and is compared toSenna birostris var.hookeriana s.str.     

Aegilops cylindrica var.kastorianum (Poaceae): A new variety from Greece

A native population ofAegilops cylindrica was encountered for the first time in Greece in 1980 (near Kastoria, NW. Greece), completely isolated and at a great distance from its main distribution area. There are morphological and chromosomal, but no protein and esterase pattern differences from otherAe. cylindrica populations. This justifies the recognition of a new variety: var.kastorianum. Our comparative and karyotypic observations support the view thatAe. caudata var.polyathera and not var.caudata (typica) is the possible donor of genome C of the new variety.     

云南石斛属一新变种

布朗山石斛 新变种 Dendrobium chryseum Rolfe var.bulangense G.X.Ma et G.J.Xu,var.nov.A typo differt planta manifeste nana,25～35 cm alta;foliis apice minusve hamatis;labello reniformi purpura nulla vel obscura Yunnan:Menghai,alt. 1100 m,20.May 1991,G.X.Ma 91021(Holotype,deposited in Herb.,China Pharmaceutical University) 新变种和原变种的区别在于:植株显著矮小,高25～35cm;叶先端钩转;唇瓣上无肾形紫色斑块或紫色斑块不明显。     

Two new species and one new variety of Oudemansiella (Agaricales) from Japan

Two new species and one new variety of Oudemansiella (Agaricales) from Japan are described and illustrated: (1) Oudemansiella latilamellata sp. nov. (subgenus Xerula, section Radicatae) has relatively broad lamellae and broadly ellipsoid spores with a subacute apex; (2) Oudemansiella rhodophylla sp. nov. (subgenus Xerula, section Radicatae), growing in deciduous forests of Fagus crenata, Quercus crispula, etc., is characteristic in having lamellae tinted reddish; and (3) Oudemansiella amygdaliformis var. bispora var. nov. (subgenus Xerula, section Albotomentosae) is distinguished from the type variety by having two-spored basidia and grows in evergreen oak forests (Castanopsis sieboldii, Quercus glauca, etc.) or bamboo groves.     

A new species and a new variety of Glyphochloa (Poaceae) from the Western Ghats of India

A new species, Glyphochloa maharashtraensis, and a new variety, Glyphochloa maharasthraensis var. hirsuta are described and illustrated from the Western Ghats of India.     

A new annulate Pluteus variety from Italy

Pluteus aurantiorugosus, var. aurantiovelatus var. nov., is described from Italy based on both morphological and ITS rDNA data. This taxon is characterized by an ornamented stipe provided with reddish orange remnants of a partial veil. The occurrence of the partial veil in Pluteus also is discussed.     

A new and eyeless cobitid fish (Pisces, Cypriniformes) from the Zagros Mountains, Iran

The first blind, and colourless, noemacheiline cobitid fish is described and compared with other cave-dwelling species of the subfamily. The new taxon, recently discovered in a natural well connected with subterranean waters in the Zagros Mountains of Iran, coexists with the blind depigmented cyprinid fish Iranocypris typhlops discovered in 1937. Some consideration is given to the generic status of the new species and its relationships to other noemacheilines.     

A new variety of coreopsis Californica (Compositae) Endemic to Arizona

Coreopsis californica var. newberryi, a new variety, differing from typical material ofC. californica in achene morphology, is proposed. Achene spotting in the two varieties exhibits maternal inheritance.