Limestone Areas In Guangxi Research Articles

Vaccinium bangliangense, a new species of Ericaceae from limestone areas in Guangxi, China

Vacciniumbangliangense, a new species from limestone areas in Guangxi, China, is described and illustrated. It is morphologically most similar to V.pseudotonkinense and V.sciaphilum in having small and dense obovate leaf blades with a retuse apex, hairy young branches and calyx and campanulate corollas, but can be distinguished from them by the distance of basal gland from petiole, the length of peduncle, pedicle and filaments, the indumentum of calyx tube and corolla and the existence of apical glands on calyx lobes. A table to distinguish the new species from other morphologically similar Vaccinium species, as well as colour plates of comparison of key characters, is also provided.

Aspidistra saccata (Asparagaceae), a new species with erect stem from limestone areas in Guangxi, China

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Primulina spiradiclioides (Gesneriaceae), a New Species from Limestone Areas in Guangxi, China

Primulina spiradiclioides Z.B. Xin & F. Wen (Gesneriaceae), a new species from limestone areas in Guangxi, China, is described and illustrated. It resembles P. curvituba, but can be easily distinguished from it by several characters, especially by its straight corolla tube. We found only one population with fewer than 200 mature individuals at the type locality.

Aristolochia yachangensis, a new species of Aristolochiaceae from limestone areas in Guangxi, China.

Aristolochia yachangensis B.G.Huang, Yan Liu & Y.S.Huang, a new species from limestone areas in Guangxi, China, is described and illustrated. It is morphologically most similar to A. fangchi Y.C.Wu ex L.D.Chow & S.M.Hwang, A. petelotii O.C. Schmidt and A. championii Merr. & Chun in shape of leaf blade, anther, gynostemium and inflorescence on old woody stems. However, it can be easily distinguished from the latter by shape of inflorescence, length of upper and lower portions of perianth tube, colour of the limb and throat. A table and a key to distinguish the new species from other morphologically similar Aristolochia species are also provided.

Diospyros microcalyx (Ebenaceae), a new species from limestone areas in Guangxi, China

Diospyros microcalyx, a rare new species of Diospyros (Ebenaceae) from the southwest of Guangxi, China is described and illustrated. It is unique in having small calyx lobes, very large fruits 6–8(–10) cm in diameter without persistent fruiting calyx, and seeds with longitudinal grooves on the surface. A detailed description, along with line drawings, photographs, distribution, habitat and ecology, conservation status as well as a comparison to morphologically similar species is provided.

Diospyros leei(Ebenaceae), a New Species from Limestone Areas in Guangxi, China

Diospyros leei Yan Liu, S. Shi & Y.S. Huang, a new species of Ebenaceae from limestone areas in Guangxi, China is described and illustrated. It is similar to D. rostrata and D. chunii, but differs by its 3.5–12 cm long and 1–1 cm wide leaf blade with a cuneate or obtuse base; 4-lobed calyx; and fruit which is elliptic, ca. 3.3 cm in diam. in the middle, glabrous or sometimes sparsely brown strigose, its apex being prominently rostrate, with a beak longer than 1 cm.

Aristolochia gongchengensis(Aristolochiaceae), a New Species from the Limestone Areas in Guangxi, China

Aristolochia gongchengensis Y.S. Huang, Y.D. Peng & C.R. Lin, a new species of Aristolochiaceae is described and illustrated from the limestone areas in Guangxi, China. It is similar to A. kwangsiensis, A. mulunensis and A. scytophylla, but differs from the three by its conspicuously concave adaxial leaf veins; ca. 1.5 mm long, triangular-ovate bracteoles; ca. 1.5 cm long basal portion of perianth tube; deeply 3-lobed calyx limb; lobes being triangular-oblong, ca. 2 cm long, ca. 1.5 cm wide, adaxially densely dark purple and with verrucose protuberances; throat which is obscured by connate bases of lobes; ca. 0.6 cm long ovary; and 3-lobed gynostemium with round lobe apices and glabrous margins.

Aspidistra longgangensis sp. nov. (Asparagaceae) from limestone areas in Guangxi, China

Aspidistra longgangensis C. R. Lin, Y. S. Huang & Yan Liu, a new species of Asparagaceae from the limestone areas in Guangxi, China, is described and illustrated. It is similar to A. guangxiensis S. C. Tang & Yan Liu in the shape of the flower, but differs by leaf blade pachyphyllous and bigger; the perianth lobes with appendages at base, appendage oblong, 3–5 mm long, apex incurved; stigma upper surface white, with 4(3) radial, bifurcate lines in the center. The new species is currently known only from Longgang National Natural Reserve, situated in southwestern Guangxi, China, near the border with northern Vietnam.

Aristolochia huanjiangensis(Aristolochiaceae), a New Species from Guangxi, China

Aristolochia huanjiangensis (Aristolochiaceae), a new species from limestone areas in Guangxi, southern China, is described and illustrated. It is compared with the two most similar species A. scytophylla and A. fangchi.

Novelties in Begonia sect. Coelocentrum: B. longgangensis and B. ferox from limestone areas in Guangxi, China.

BackgroundThe spectacular karst limestone landscape in Guangxi harbors high-level diversity and endemism of Begonia species, especially those of sect. Coelocentrum. In continuation of our studies in this area, we report the discovery of two attractive new species from southwestern Guangxi: Begonia longgangensis and B. ferox.ResultsBegonia longgangensis resembles B. liuyanii, also from Longgang Nature Reserve, in the broadly ovate to suborbicular leaf blade, differing by the much smaller leaves, subglabrous leaf surface, pink flowers, dichasial cymes and the remarkably long stolons sent out from rhizomes. Unexpectedly, both diploid (2n = 30) and triploid counts (2n = 45) were observed in plants collected from the type locality. Begonia ferox probably has the most prominent bullate leaves for the genus. In this aspect, it is similar to B. nahangensis reported from northern Vietnam recently, but is readily distinguishable by the ovate, chartaceous leaves with an acuminate apex; tomentose peduncle not exceeding petioles; and the much larger stature in vegetative parts. A diploid count of 2n = 30 was determined for this unique new species.ConclusionsAll available data support the recognition of the two new species. Begonia longgangensis has remarkably long stolons and B. ferox is characterized by the prominent bullate leaves. Line drawings, color plates and comparisons are provided to aid in identification of the novelties.Electronic supplementary materialThe online version of this article (doi:10.1186/1999-3110-54-44) contains supplementary material, which is available to authorized users.

Ophiopogon yangshuoensis(Asparagaceae), a New Species from Guangxi, China

Ophiopogon yangshuoensis R.H. Jiang & W.B. Xu (Asparagaceae), a new species from limestone areas in Guangxi, China, is described and illustrated. It is similar to O. intermedius, but differs by its abaxially glaucous leaves, white streaked, broadlanceolate or ovate-lanceolate bracts, narrow-lanceolate innermost bracts, and ovate, reflexed tepals.

Aspidistra albiflora sp. nov. (Asparagaceae) from southwestern Guangxi, China

Aspidistra albiflora C. R. Lin, W. B. Xu & Yan Liu (Asparagaceae) is described and illustrated as a new species from limestone areas in Guangxi, China. The new species is similar to A. cerina G. Z. Li & S. C. Tang, but differs in having the perianth white by the sides, white pistils, bracts longer than the perianth, anthers only 2 mm long, pistil obconical and stigma slightly enlarged, 4–5 mm in diameter. The new species is currently only known from the type locality in southwestern Guangxi, near the border to northern Vietnam.

Impatiens pingxiangensis sp. nov. (Balsaminaceae) from the limestone areas in Guangxi, China

Impatiens pingxiangensis H. Y. Bi & S. X. Yu (Balsaminaceae), a new species from the limestone areas in Guangxi, China, is described and illustrated. The new species is similar to I. obesa in having succulent stems, subsessile peduncle, tufted pedicel and the lower petal in each pair of lateral united petals being connate, but differs from the latter by having perennial stems, leaf blades with 7–9 pairs of lateral veins, 1–2-flowered racemes, ovate inner lateral sepals, and elliptic capsule. Moreover, the pollen and seed coat characters also support the recognition of the new species.