Research Article |
Corresponding author: Shoubiao Zhou ( zhoushoubiao@vip.163.com ) Corresponding author: Kun Liu ( hudixiao@126.com ) Academic editor: Yasen Mutafchiev
© 2018 Ying Wang, Wen Ma, Shoubiao Zhou, Kun Liu.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Wang Y, Ma W, Zhou S, Liu K (2018) Lysimachia tianmaensis (Primulaceae), a new species from Anhui, China. PhytoKeys 98: 117-124. https://doi.org/10.3897/phytokeys.98.23751
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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 , species nova, China, taxonomy
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 (
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.
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.
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!).
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.
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.
CHINA. Anhui Province: Jinzhai County, Tiantangzhai, ca. 650 m, 17 June 2008, K. Liu 2008056 (ANUB); Jinzhai County, Mazongling mountain, 950 m, 1 June 2009, K. Liu 2009038 (ANUB); Jinzhai County, Tiantangzhai, ca. 700 m, 1983, X.S. Sheng 1437 (ANUB); Jinzhai County, Baimazhai, 900 m, 18 May 1984, G. Yao 9004 (NAS); Jinzhai County, Baimazhai, 700 m, 23 May 1984, G. Yao 9056 (NAS); Jinzhai County, Gubeizhen, 720 m, 4 May 2016, J.W. Shao ANUB00569 (ANUB).
Lysimachia tianmaensis is endemic to Dabieshan Mt., China (including Jinzhai County, Yingshan County etc.), growing at margins of mountain woodlands, roadsides or under broad-leaved forests at altitudes of 600–1200 m.
The epithet “tianmaensis” is derived from the type locality, Tianma National Nature Reserve, Jinzhai Xian, Anhui Province, China.
China: tian ma guo lu huang.
Flowering April–June, fruiting June–August.
A large number of populations of Lysimachia tianmaensis were found during the extensive investigation in Tianma National Nature Reserve. This species is also distributed in other areas in Dabieshan Mt. as well as Tianma National Nature Reserve. This species often grows under broad-leaved forests above 600 m. This species is fairly common there and therefore proposed as Least Concern following the IUCN Red List Criteria (IUCN 2016).
Lysimachia tianmaensis is quite distinct from all other species in subgenus Lysimachia. Its morphological affinity is with L. grammica, L. remota Petitmengin and L. pseudohenryi Pampanini, but it can be easily distinguished by some characters (Table
Diagnostic character differences amongst Lysimachia tianmaensis, L. grammica, L. remota and L. pseudohenryi.
Species | L. tianmaensis | L. grammica | L. remota | L. pseudohenryi |
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Source | This study |
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Leaf | alternate, occasionally opposite on lower part; abaxially brown glandular punctate; base auriculate on middle and lower part of stems and branches | opposite on lower part, alternate on upper part; black glandular stripes | opposite, occasionally alternate on upper part; sparsely transparent glandular punctate | opposite; sparsely transparent glandular |
Blade size (cm) | 1.5–5.5 × 1.0–3.5 | 1.3–3.5 × 0.8–2.5 | 1.5–3.2 × 0.7–2.0 | 2–8 × 0.8–2.5 |
Infloresecence | flowers solitary, in axils of apically diminished leaves, often abbreviated, nearly capitate at apex of stems and branches | flowers solitary, in axils of upper leaves | flowers solitary, in axils of upper leaves, or capitate with flowers aggregated near apex of stems |
racemes terminal, abbreviated, often nearly capitate |
Filament | filaments connate basally into a 0.5–1.0 mm high ring | filaments connate basally into a ca. 0.5 mm high ring | filaments connate basally into a 0.5–1.0 mm high ring | filaments connate basally into a 2–3 mm high tube |
Corolla | transparent glandular | brown glandular stripes | transparent glandular | transparent glandular |
This study was financially supported by the National Natural Science Foundation of China (31400291) and Collaborative Innovation Centre of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Anhui Province; College of Life Sciences, Anhui Normal University.