Lysimachia dabieshanensis sp. nov.(Primulaceae), a new species from Dabieshan Mountain, China

Tags: Lysimachia, Acta Phytotaxonomica Sinica, Anhui Normal University, solitary flowers, Key Foundation of Education Department of Anhui Province, Missouri Botanical Garden Press, Tim Utteridge, IUCN Species Survival Commission, References Chen, Fang Sun, Hefei Normal University, China, Lysimachia plant, Correspondence, Anhui Province, Lysimachia dabieshanensis K. Liu, Science Press
Content: Phytotaxa 174 (2): 119­122 www.mapress.com/phytotaxa/ Copyright © 2014 Magnolia Press
Correspondence http://dx.doi.org/10.11646/phytotaxa.174.2.8
ISSN 1179-3155 (print edition) PHYTOTAXA ISSN 1179-3163 (online edition)
Lysimachia dabieshanensis sp. nov. (Primulaceae), a new species from Dabieshan Mountain, China
KUN LIU1, SHOU-BIAO ZHOU1*, YAN-SONG CHEN1,2 & XIN HONG1 1Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Nor- mal University, CN-241000, Wuhu, China. Email: [email protected], [email protected], [email protected] 2Department of Life Sciences, Hefei Normal University, CN-230601, Hefei, China. Email: [email protected] *Author for Correspondence
Abstract A new species of Primulaceae, Lysimachia dabieshanensis K. Liu & S.B. Zhou, is described and illustrated from Dabieshan mountain, Anhui, China. It is similar to L. melampyroides var. amplexicaulis and L. klattiana in leaf and flower shape, but can be distinguished by its taller plant, connate-perfoliate leaves at lower nodes of stem and branch, and obviously raised veins abaxially. Key words: Lysimachia, Anhui, new species, taxonomy
Introduction Lysimachia is a genus of about 180 species mainly distributed in the temperate and subtropical parts of the Northern Hemisphere, but with a few species in Africa, Australia and South America. In the Flora of China, 138 species were recorded as native in China (Hu & Kelso, 1996), with the greatest concentration of species in Yunnan, southern Sichuan, western Guizhou and Guangxi. The center of origin of this genus may be in the south-western part of China (Chen & Hu, 1979). New species in this genus are still being described in China (Shao et al. 2004, Shao et al. 2006, Yan & Hao, 2012). In June 2008, the first author found a wild Lysimachia plant during field work at Yaoluoping Village, Yuexi County, Anhui Province. One year later, the authors made four botanical expeditions to Mt Dabieshan, Anhui Province in May, June, July and September 2009 where many populations of this plant were discovered and collected, including several living plants which were cultivated at Anhui Normal University, Wuhu, for further observation and research. After careful Comparative studies, and consulting the relevant literature (Chen & Hu 1979, Chen et al. 1989, Hu & Kelso 1996, Shao et al. 2004, Shao et al. 2006, Yan & Hao 2012), we conclude that the plants represent an undescribed species. Taxonomic treatment Lysimachia dabieshanensis Kun Liu & S.B.Zhou, sp. nov. (Figs. 1, 2) Differing from Lysimachia melampyroides var. amplexicaulis Chen et C.M. Hu and L. klattiana Hance in being a relatively taller plant (40­110 cm), having opposite and larger leaves with their bases fusing around the stem at lower nodes, veins obviously raised abaxially, and the terminal inflorescences in capitate clusters at the apex of stems and branches. Type:­­CHINA. Anhui Province: Jinzhai County, Qianping village, growing at margins of mountain woodlands, grassy slopes, mountain streamsides, elevation ca. 780 m, 2 June 2009 (fl.), Kun Liu 2009030 (holotype, ANU!, isotypes, IBK!).
Accepted by Tim Utteridge: 10 Jun. 2014; published: 9 Jul. 2014
119
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Leaf blade 30­90 Ч 5­25 mm; flowers 7­9 mm.................................................................................................................................6
6. Leaves petiolate........................................................................................................................ L. melampyroides var. melampyroides
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Leaves sessile, clasping at base.................................................................................................. L. melampyroides var. amplexicaulis
TABLE 1. DiagnostiC Differences among Lysimachia dabieshanensis, L. melampyroides var. amplexicaulis and L.
klattiana.
Characters
Lysimachia dabieshanensis
L. melampyroides var. amplexicaulis
L. klattiana
Stem
40­110 cm high, branched from 20­50 cm high, usually branched
15­45 cm high, seldom branched
middle
from middle
Leaf
opposite or 6 to many aggregated at apex of stems and branches
opposite
3 or 4 per whorl or opposite at lower nodes
Blade base on the stem
semiclasping and connate with opposite leaf base
sessile, clasping at base
cuneate
Blade size (cm)
3­14 Ч 1­4
4­7 Ч 1­2.5
2­5.5 (­11) Ч 0.5­1.2 (­2.5)
Vein Flower Corolla
veins 4­7 pairs, obviously raised abaxially; veinlets visible inflorescences terminal, in capitate clusters at apex of stems and branches, rarely with solitary flowers in axils of lower leaves 1.2­1.9 cm long, tube 3­4.5 mm long
veins 4­5 pairs; veinlets inconspicuous. Flowers solitary, in axils of upper leaves, occasionally flowers aggregated toward apex 0.7­0.9 cm long, tube 1­2 mm long
veins 3­5 pairs, slightly raised abaxially; veinlets invisible umbels terminal, rarely with solitary flowers in axils of lower leaves 1.1­1.2 cm long, tube 2.5­3 mm long
Acknowledgements We thank Fang Sun and Xiao-Ming Xu for drawing the handsome illustration. This study was financially supported by the natural science Foundation of Anhui Province (11040606M77), the Key Foundation of Education Department of Anhui Province (KJ2011A129) and The Innovation Funds of Anhui Normal University (2012cxjj07). References Chen, F.H., Hu, C.M. (1979) Taxonomic and phytogeographic studies on Chinese species of Lysimachia. Acta Phytotaxonomica Sinica 17: 21­53. Chen, F.H., Hu, C.M., Fang, Y.I., Cheng, C.Z. (1989) Primulaceae. In: Chen, F.H. & Hu, C.M. (Eds) Flora Reipublicae Popularis Sinicae 59. Science Press, Beijing, pp. 3­133. Hu, C.M., Kelso, S. (1996) Primulaceae. In: Wu, Z.Y. & Raven, P.H. (Eds) Flora of China 15. Science Press, Beijing, and Missouri Botanical Garden Press, St Louis, pp. 39­189. IUCN (2001) IUCN Red List Categories and Criteria, Version 3.1. Gland, Switzerland and Cambridge, United Kingdom, IUCN Species Survival Commission. Shao, J.W., Zhang, X.P., Guo, X.H. (2004) A new species of Lysimachia in Primulaceae. Bulletin of Botanical Research 24: 389­391. Shao, J.W., Zhang, X.P., Guo, X.H. (2006) Lysimachia dextrorsiflora X.P. Zhang, X.H. Guo & J.W. Shao, a new species of Primulaceae from China. Acta Phytotaxonomica Sinica 44: 589­594. http://dx.doi.org/10.1360/aps050135 Yan, H.F., Hao, G. (2012) Lysimachia huchimingii sp. nov. (Primulaceae) from China. Nordic Journal of Botany 30: 443­445. http://dx.doi.org/10.1111/j.1756-1051.2012.01401.x
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Title: Lysimachia dabieshanensis sp. nov. (Primulaceae), a new species from Dabieshan Mountain, China
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