Asarum wannanense Lu Q. Huang & H. S. Peng, 2023

Peng, Hua-Sheng, Yin, Min-Zhen, Wang, De-Qun, Liu, Hao, Liu, He-Ling & Huang, Lu-Qi, 2023, Asarum wannanense, a new species of Aristolochiaceae from Southern Anhui, Eastern China, Phytotaxa 595 (1), pp. 115-119 : 116-118

publication ID 10.11646/phytotaxa.595.1.9


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Asarum wannanense Lu Q. Huang & H. S. Peng

sp. nov.

Asarum wannanense Lu Q. Huang & H. S. Peng View in CoL , sp. nov. ( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 )

Diagnosis:—Similar to A. magnificum , though notable for calyx tubes constricted at middle and upper part with an orifice ca. 4 mm wide ring, which the orifice ring and the floral opening have been elongated into a secondary calyx tube with transversely corrugate characteristics.

Type:— CHINA. Anhui Province, Qimen County, Likou Town , under the evergreen broad-leaved forest, elev. 300–700 m, 2 May 2021, Peng HS 2021050201 (holotype ACM!; isotype ACM!) .

Herbs perennial. Rhizomes short and vertical, 1–3 mm in diam. Leaves solitary, nearly leathery; petiole 8–17 cm, pubescent; leaf blade adaxially deep green with or without white blotches, triangular-ovate or nearly triangular to elliptic-ovate, 7–13 cm long, 5–12 cm wide, apex acute, base auriculate-cordate, lateral lobes divaricate, 3–8 cm long, 3–8 cm wide, adaxial surface pubescent along midvein, abaxial surface green and glabrous, reticulate veins apparent; cataphylls ovate, ca. 2 cm long, ca. 1 cm wide, margin dense ciliolate. Peduncle recurved, 0.5–4 cm long. Calyx purplish green; calyx tube campanulate or long cylindric, 4.5–5 cm long, 1.2–2 cm in diam., the distal part of calyx tube abruptly swollen, then constricted at middle and upper part, with an orifice ring ca. 4 mm wide; the orifice ring and the floral opening have been elongated into a secondary calyx tube, transversely corrugate, orifice ring below the base of the tube longitudinally corrugate; lobes triangular-ovate, ca. 3 cm long, ca. 2 cm wide, base with triangular papillate area. Stamens 12. Filaments much shorter than anthers; connectives slightly extended beyond anthers, acute. Styles 6, free, apex 2-forked; stigmas lateral. Ovary half-inferior. Fruit and seeds not observed.

Distribution and habitat: — Asarum wannanense was found in the south of Anhui Province and its adjacent areas, southeast China. It grows on forests, thickets, mountain slopes, moist shady areas at elevations of 300– 700 m.

Phenology: —Flowering from March to June, fruits not observed.

Additional specimens examined (paratype): — CHINA. Anhui Province: Shitai County, Guniujiang National Nature Reserve, 273 m, 10 June 2018, Ningyu Xiong et al. NAS00611659 View Materials , NAS00611661 View Materials ( NAS!) .

Etymology: —The specific epithet “wannanense” refers to its distribution area of the southern Anhui and adjacent regions.

Vernacular name: —The Chinese name is “Wǎn Nán Xì Xīn” (Êfflâƚ).


Australian Collection of Microorganisms


Institute of Botany, Jiangsu Province and Chinese Academy of Sciences

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