Lysimachia tianmaensis (Primulaceae), a new species from Anhui, China
PhytoKeys
Lysimachia tianmaensis (Primulaceae), a new species from Anhui, China
Ying Wang 0
Wen Ma
Shoubiao Zhou 0
Kun Liu 0
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Kun Liu (hudixiao@
.com)
0 Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University , Wuhu 241000 , China 2 Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, College of Environmental Science and Engineering, Anhui Normal University , Wuhu 241002 , China 3 College of Life Sciences, Shaanxi Normal University , Xi'an 710119 , China
A new species of Lysimachia (Primulaceae), Lysimachia tianmaensis K. Liu, S.B. Zhou & Ying Wang sp. nov., is described and illustrated from Jinzhai County, Anhui, China. It is endemic to Dabieshan Mountain, China. The new species has yellow flowers and belongs to the subgenus Lysimachia section Nummularia series Grammicae. It is very easily distinguishable from other related species by having alternate leaves with brown patches beneath and an auriculated leaf base. Lysimachia Linnaeus is one of the largest genera of Primulaceae s. l. and it comprises about 200 species, mainly distributed in the temperate and subtropical parts of the northern hemisphere, as well as in some tropical mountain regions (Chen and Hu 1979, Hu and Kelso 1996, Marr and Bohm 1997, Hao et al. 2004, Julius et al. 2016). On the whole, it is almost cosmopolitan, but the greatest concentration of the species occurs in China (with ca. 140 species; Chen et al. 1989, Hu and Kelso 1996). Some
eol>Lysimachia; species nova; China; taxonomy
Introduction
Copyright YingWang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0),
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new species in Lysimachia are still being found
(Peng and Hu 1999, Shao et al. 2004,
Shao et al. 2006, Zhang et al. 2006, Yan and Hao 2012, Liu et al. 2014a, 2014b, Estes
et al. 2015, Zhou et al. 2015, Baskose et al. 2016, Julius et al. 2016)
.
In 2007, during the course of checking specimens in the herbaria of Anhui Normal
University, a specimen of Lysimachia caught the authors’ attention. This plant was
collected by Shen in 1983 from Jinzhai County, Anhui Province and was not identified.
This plant has alternate leaves and an obvious broadly-winged petiole with an
auriculate base. It should thus represent an undescribed species, as this character combination
is not known from any other species. In 2008–2009, the authors made several
botanical expeditions to Tianma Nature Reserve, in Jinzhai County, Anhui Province. Many
populations of this plant were found bearing flowers or fruits there. In this paper, this
plant and related species were comparatively studied.
Materials and methods
Vouchers of Lysimachia tianmaensis were collected from Tianma National Nature
Reserve of Anhui. Gross morphology and phenology data were obtained during the field
expedition. Descriptions were collected from living plants.
Taxonomy
Lysimachia tianmaensis K. Liu, S.B. Zhou & Ying Wang, sp. nov.
urn:lsid:ipni.org:names:77178766-1
Figures 1–3
Type. CHINA. Anhui Province: Jinzhai County, Tianma National Nature Reserve,
growing at margins of mountain roads, elevation ca. 1165 m, 1 June 2009 (fl.), Kun
Liu 2009042 (holotype: ANUB!; isotypes: ANUB!, IBK!).
Diagnosis. Lysimachia tianmaensis is similar to Lysimachia grammica Hance in the
alternate leaves, but differs by having a larger blade with brown patches beneath, an
auriculate leaf base and subcapitate inflorescences.
Description. Herbs perennial, 15–45 cm tall. Stems often many, erect or arcuate
at base, terete, simple or short branched, with tangled multicellular hairs. Leaves
alternate, occasionally opposite on lower part; petiole 3–25 mm, broadly winged, base
auriculate on leaves from middle and lower part of stems and branches. Leaf blades ovate
to ovate-elliptic, rarely ovate-lanceolate, 1.5–5.5 × 1.0–3.5 cm, abaxially multicellular
hairs, brown patches, adaxially pubescent, base broadly cuneate to subrounded, apex
acute to subobtuse; veins 2 or 3 pairs, inconspicuous. Flowers solitary, in axils of
apically diminished leaves, often in shortened, nearly capitate inflorescences at apex of
stems and branches. Pedicel densely covered with multicellular hairs; lowest pedicels
2–3 cm, gradually reduced in length in upper flowers, recurved in fruit. Calyx lobes
ovate-lanceolate, 6–7 × 1–1.4 mm, abaxially sparsely pubescent. Corolla yellow; tube
0.5–1 mm; lobes ovate or rhomboid-ovate, 8–11 × 5–7.5 mm, transparent glandular.
Filaments connate basally into a 0.5–1 mm high ring, free parts 2.5–3 mm; anthers
dorsifixed, opening by lateral slits. Ovary pubescent; style 5–6 mm. Capsule
subglobose, 3.5–5 mm in diam. Fl. Apr–Jun.
Additional collection. CHINA. Anhui Province: Jinzhai County, Tiantangzhai,
ca. 650 m (...truncated)