A Bryophyte Flora of Berkshire and Oxfordshire I. Hepadcae and Sphagna

Abstract

A new species of Uleobryum, U. curtisii, collected in Queensland, Australia is described. It differs from the only otherspecies, U. peruvianum from South America, particularly in the multipapillose lamina cells and the smoother calyptra. Axillary bulbils were present in one population.     

A comparison of Dichodontium flavescens (Dicks.) Lindb. and D. pellucidum (Hedw.) Lindb. (Bryopsida)

Abstract

Fifty-three herbarium samples of the genus Dichodontium, originating from 15 countries in Europe and North America, were examined to critically assess new distinguishing characters between D. flavescens and D. pellucidum. The examination, including SEM, revealed some new characteristics in the gametophyte, notably leaf shape, leaf length: width ratio, and width of the nerve, permitting accurate determinations even on sterile material. D. flavescens is recognized here as a distinct species.     

African Hepatics: VIII. Diplasiolejeunea albifolia (Taylor) E. W. Jones comb.nov.

Abstract

The new combination Tetralophozia filiformis (Steph.) E. Urmi is proposed for Chandonanthus filiformis Steph. So far this species has been known only from Asia and N. America. Recent collections show it to occur also in Europe, in the Cantabrian Mts., Spain. Here it grows in sheltered places on siliceous rocks in oceanic conditions. From Tetralophozia setiformis (Ehrh.) Schljak. (=Chandonanthus setiformis) it is distinguished by its smaller size, the leaf lobes are always more than twice as long as wide and their margins are not inflexed towards the stem.     

Primula vallicola sp. nov. (Primulaceae) from Sichuan,China

A new species of Primula, P. vallicola Y. Xu, G. Hao & C.M. Hu, is described and illustrated from Sichuan province, China. Based on general morphology the new species is assigned to Primula sect. Aleuritia subsect. Yunnanensis. It is closely allied to P. kialensis, but can be distinguished by its larger stature, leaf shape, and the well‐differentiated petiole. The leaf shape of the new species is ovate to ovate‐elliptic and usually sub‐rounded at base. The new species also resembles P. homogama, but differs in being glabrous rather than with appressed hairs, and with longer petiole.     

Two new species of <Emphasis Type="Italic">Leptolobium</Emphasis> (Leguminosae,Papilionoideae) from Brazil

Two new species of Leptolobium from Brazil are described and illustrated. Leptolobium araguaiense, restricted to northern Brazil, is similar to L. panamense, but differs in raceme length, ovary pubescence, flower and bract length, hilum shape, habit, geographical distribution, and preferential habitat. Leptolobium multijugum, from midwestern Brazil, is perhaps most closely related to L. glaziovianum, but it has more numerous leaflets and smaller bracts and bracteoles than any other species in the genus.     

狭义蛇葡萄属东亚支系的系统发生与生物地理演化

狭义蛇葡萄属(Ampelopsis s. str.)是葡萄科的落叶木质藤本植物,主要分布在北半球温带地区,特别是东亚为其重要的分布和演化中心。该研究选取了狭义蛇葡萄属15个种的37个样本,对其5个叶绿体基因片段(trnL-F、rps16、psbA-trnH、atpB-rbcL和trnK-petN)和2个核基因标记(ITS和GAI1)进行了分子测序;利用测序获得的分子数据探讨属内的系统发生关系,叶的性状演化以及生物地理起源演化。结果表明：(1)狭义蛇葡萄属是一个单系类群,属内东亚地区的物种聚成一支。(2)叶绿体基因数据分析结果表明,狭义蛇葡萄属东亚支系分为两支系,这两支系的分布范围大致与东亚植物区系的中国-日本森林和中国-喜马拉雅森林亚区范围相一致。(3)形态演化分析表明,掌状复叶为祖征,叶形态性状存在多次的独立起源和演化,其变化与系统进化没有明显的关系。(4)生物地理分析结果表明,狭义蛇葡萄属起源于北美,渐新世晚期至中新世早期迁移扩散至欧洲,中新世中期随着全球气温回暖迁移至东亚,并进一步在东亚地区快速分化形成多样化中心,这可能与中新世时期的气候温暖、受第四纪冰川影响较少以及东亚地区复杂...     

Saussurea haizishanensis sp. nov. (Compositae,Cardueae) from Sichuan,China

Saussurea haizishanensis B. Q. Xiu, G. Hao & N. H. Xia sp. nov., a new species from Sichuan, China, belonging to Saussurea subg. Eriocoryne (DC.) Hook. f. sect. Cincta Lipsch., is described and illustrated. It is similar to S. delavayi, but differs in its narrowly elliptic, lanceolate or broadly lanceolate leaves, outer phyllaries that are broadly triangular with irregularly dentate margin, and densely yellowish stipitate glandular stem, leaf blades, and adaxial phyllaries. It is also similar to S. schlagintweitii, but differs in possessing numerous capitula and having adaxially glabrous petiole bases. Color plates, line drawings, a distribution map of S. haizishanensis, photographs of phyllaries and leaf blades, and SEM microphotographs of the adaxial surface of style arms, the leaf blades, the abaxial surface of phyllaries of S. haizishanensis and S. delavayi are provided.     

Leptodontium paradoxum,a new moss from Australia

Abstract

A new species, Leptodontiumparadoxum, is described from southern Australia. It differs from L. viticulosoides, a widespread species which occurs in southern Queensland, in the entire leaf margin and in the smaller and less conspicuous patch of inner basal cells.     

Machilus parapauhoi sp. nov. and a new synonym of Machilus (Lauraceae) from east Asia

A new species of the genus Machilus Nees (Lauraceae) from China, M. parapauhoi F. N. Wei, S. C. Tang & W. B. Xu is described and illustrated. The new species is similar to M. pauhoi Kanehira, but differs in its densely appressed pubescent branchlets and petioles, shorter petiole, 0.8–1.2 cm long and an infructescence conspicuously shorter than the leaf. It is also similar to M. kwangtungensis Yang, but differs by its oblique leaves, with falcately curved apex and 14–18 lateral veins on both sides of the midrib. Based on a study of the type and isotype specimens of M. balansae (Airy Shaw) F. N. Wei & S. C. Tang and M. grandifolia S. Lee & F. N. Wei, M. grandifolia is regarded as a new synonym of M. balansae.     

Pyrus ciancioi (Rosaceae), a new species from Sicily

Abstract

A new species of Pyrus L. from the Nebrodi Mountains (northeast Sicily) is described, named, and illustrated. It differs from Pyrus spinosa in the shape and diameter/length ratio of its fruits and in the width/length ratio of the leaf lamina. An analytical key to the Pyrus species growing in Sicily is provided.     

Aerobryum brevicuspis S.He (Brachytheciaceae), a new species from northern Vietnam

A new species of Aerobryum Dozy & Molk. (Brachytheciaceae), A. brevicuspis S.He from Lao Cai Province, northern Vietnam is described and illustrated. The new species resembles epiphytic A. speciosum Dozy & Molk. in the presence of pendent, sparsely branched stems, similar shape of leaves and areolation, but differs by its apiculate to cuspidate leaf apices, a single, faint or sometimes double costae in branch leaves, rather differentiated alar cells, the presence of a central strand in the stems, and numerous clustered axillary hairs that are often 5-8(-10) cells long.     

Plagiochila britannica,a new species in the British Isles

Abstract

Plagiochila britannica is described as a new species. It differs from P. porelloides and P. asplenioides in many characters, especially its often more narrowly oval leaves with a more variable, often truncate to bilobed apex and larger cells, its wider antical stem cells and its diploid chromosome number. Differences from P. arctica var intermedia include its more variable leaf apex, generally more dentate leaves often with longer teeth, the greater maximum size of its leaf cells and its wider antical stem cells. Male and female inflorescences and sporophytes are known in P. britannica, which favours base-rich substrata and has been found in Wales, N. England, Scotland and N. Ireland. A key to the nine species of Plagiochila in the British Isles is included.     

Coffeatoshii sp. nov. (Rubiaceae) from Madagascar

A new species of Coffea from southern central Madagascar, C. toshii, is described and illustrated. The new species is similar to C. buxifolia but differs due to its short, broad spreading habit (vs narrow habit), conspicuous domatia (vs inconspicuous), consistently red fruit (vs reddish purple to dull purple or red), longer fruiting pedicel (vs shorter), presence of bracts (vs absence) and occurrence at lower elevations (vs high elevation).     

Differentiation of fourHordeum sect.Stenostachys spp. (Poaceae: Triticeae) using multivariate morphometrics

Field collections and 296 herbarium sheets were examined for 27 morphometric variables. A priori species identifcation was based on geographical distribution except forH. californicum, a diploid species primarily occurring in California and differing from the much more widespread tetraploidH. brachyantherum that thrives in N. America and N.E. Asia;H. capense grows in S. Africa andH. secalinum mainly in Europe. Various cluster analyses were used followed by cluster recovery verification. Classificatory discriminant analysis and validation by the bootstrap yielded 85–90% overall total correct classification of the four species. Canonical analysis revealed thatH. californicum occupies an intermediate phenetic position among the other three distinct species. Factors of shape differences were unravelled and portrayed by shearing. A revised key to species was drawn up.     

Primulina suichuanensis sp. nov. (Gesneriaceae) from Danxia landform in Jiangxi,China

Primulina suichuanensis X. L. Yu & J. J. Zhou, a new species of Gesneriaceae from Jiangxi, China, is described and illustrated. Morphologically, the new species is most similar to P. roseoalba, but differs by entire leaf blade margin, narrowly ovate bracts, reddish–purple or bluish–purple corolla, 3.0–3.4 cm long corolla tube, white filaments, and 3.6 cm long pistil. It flowers from September to November.     

Ranunculus giordanoi sp. nov. from the R. auricomus complex (Ranunculaceae), central Apennines (Italy)

A new species, Ranunculus giordanoi, belonging to the R. auricomus complex is described from Latium, central Apennines (Italy). It grows in damp meadows on Monti della Laga (National Park of Gran Sasso and Monti della Laga), the largest sandstone massif of central Italy. The new species differs from the closely related R. silanus, endemic to Sila (Calabria, southern Apennines), by leaf aperture, shape of the basal leaves, entire or sometimes deeply lobed cauline leaves, gynoclinium without intervallum and longer carpellophores.     

Jacquinia pauciflora (Theophrastaceae), a new species from Puerto Rico

A new species,Jacquinia pauciflora, is described from subtropical moist forest on karst hills (mogotes) in northwestern Puerto Rico.Jacquinia pauciflora is similar toJ. stenophylla Urban, from which it differs in several floral and leaf characters, but is possibly most closely related toJ. umbellata A. DC. A key to the species ofJacquinia occurring in Puerto Rico is provided.     

Tropaeolum sparrei sp. nov. (Tropaeolaceae) from western Ecuador

A new species, Tropaeolum sparrei Ståhl (Tropaeolaceae), is described from submontane cloud forest habitat in western Ecuador. It differs from T. papillosum Hughes (the species it resembles most) by having thinner, tomentose stems, smaller, glabrous or subglabrous leaves with the petiole inserted relatively closer to the lower leaf margin, and flowers with uniformly coloured and straight calyx spurs. In leaf shape it is also similar to T. repandum Heilborn, from which it differs in its larger flowers with entirely black petals and blue anthers.