Chrysanthemum dabieshanense Z.X.Fu, A.G.Zhen, & Y.P.Ma, 2022

Fu, Zhixi, Liu, Xiaofeng, Zhen, Aiguo, Zhu, Xinxin, Konowalik, Kamil, Ma, Yueping & Li, Pan, 2022, Chrysanthemum dabieshanense, a new name for Chrysanthemum vestitum var. latifolium (Asteraceae, Anthemideae), PhytoKeys 202, pp. 45-52 : 45

Chrysanthemum dabieshanense Z.X.Fu, A.G.Zhen, & Y.P.Ma nom. nov.

Chrysanthemum vestitum latifolium ≡ Chrysanthemum vestitum var. latifolium J.Zhou & J.Y.Chen, Bull. Bot. Res. Harbin. 30: 649. 2010.

Note.

According to International Code of Nomenclature for algae, fungi, and plants (ICN) Articles 6.9, 6.11, 41.2, and 58.1 ( Turland et al. 2018), Chrysanthemum dabieshanense Z.X.Fu, A.G.Zhen, & Y.P.Ma, nom. nov. is proposed here as an explicit substitute for the legitimate name Chrysanthemum vestitum var. latifolium , because the epithet latifolium cannot be used for the present combination because of the existence of the name Chrysanthemum latifolium (DC.) Baksay, Ann. Hist. Nat. Mus. Natl. Hung. 8: 161, 1957 (online resource from https://www.tropicos.org/name/50268974). The specific epithet " dabieshanense " refers to the name of the Dabieshan (= Ta-pieh) mountain area, located at the border of the Anhui, Hubei, and Henan Provinces, where the species occurs. Chrysanthemum dabieshanense is endemic and restricted to the Dabieshan Mountain area (Hubei and Anhui provinces). Therefore, we accept Chrysanthemum dabieshanense as a replacement name for Chrysanthemum vestitum var. latifolium . A taxonomic treatment is presented.

Type.

China. Anhui Prov. Yuexi County, Baojia River , shady slope at the top of the hill, alt. 1500 m, 24 Sep 1953, East China Station Inst. Bot. 6935 (holotype, PE 00544099!, isotype NAS 00486826 photo seen) (Fig. 1B )

Description.

Perennial rhizomatous herbs, 60-100 cm tall. Stems sprawling, not much branched. Lower stem leaves withered at anthesis. Middle stem leaf blades orbicular or ovate-orbicular, 4-7 cm × 3-5 cm, grayish-green adaxially, grayish-white abaxially, margin above middle obtusely repand-dentate, distal stem leaves sessile or subsessile, capitula 3-10, 4.5-5 cm in diameter. Involucres cup-shaped; phyllaries in 4 rows, abaxially densely pubescent, scarious margin brown, outer phyllaries triangular or triangular-ovate, 3.5-4.5 mm, middle phyllaries lanceolate-ovate, ca. 6.5 mm, inner phyllaries obovate or oblanceolate-elliptic, 6-7 mm long. Ray floret lamina white, 1.2-2 cm long. Achenes ca. 1.5 mm long (Fig. 2 , Fig. 3 B, D ).

Specimens examined.

China - Anhui Prov. Jinzhai County, [without exact locality], M.B. Deng & H.T. Wei 81350, 81196 (NAS); ibidem, B. Chen CB07550 (CSH), Qianshan City, S. J. Yang et al. 7193 (NAS), Y.P. Ma MYP-20160826 (WUK) ; Hubei Prov. Yingshan County, Wujiashan Forest Farm, X.X. Zhu 089 (KUN, CSH); Luotian County , Tiantangzai, A.G. Zhen DBSYS708 (HIB); X.X. Zhu 211858 (KUN) .

Distribution and habitat.

Endemic to the Dabieshan mountain area (Anhui and Hubei Provinces, China, Fig. 4 ). It grows on shaded slopes, hills, and streamsides, at alt. 800-1600 m.

Phenology.

Flowering and fruiting are observed in October.

Chinese name.

Da-Bie-Shan-Ju (大别山菊).

Figures

Figure 1. The images of the holotype of Chrysanthemum vestitum and Chrysanthemum vestitum (Hemsl.) Stapf. var. latifolium A the lectotype of Chrysanthemum vestitum (Hemsl.) Stapf. Image courtesy of the Royal Botanic Gardens, Kew (K). (Type: China. Hubei: Yichang city, " Ichang and immediate neighborhood ", Sep 1886, A. Henry 1115 lectotype, K 000891712) B the holotype of Chrysanthemum vestitum (Hemsl.) Stapf. var. latifolium J. Zhou et J. Y. Chen. Image courtesy of the Herbarium PE, (Type: China, Anhui Province: Yuexi County, Baojia River, alt. 1500 m, 24 Sep 1953, East China Station Inst. Bot. 6935 holotype, PE 00544099!).

Figure 2. A plant of Chrysanthemum vestitum (Hemsl.) Stapf var. latifolium collected at Tianzhu Mountain, Dabieshan mountains (The voucher no. MYP- 20160826, WUK, Ma et al. 2020) A plant growing in natural habitat B the adaxial side of leaf C the abaxial side of leaf. Scale bar: 2 cm (B, C). Photographed by Yue-ping Ma.

Figure 3. The images of Chrysanthemum vestitum and Chrysanthemum dabieshanense A, B plants growing in natural habitat C, D adaxial side of leaf (A, C Chrysanthemum vestitum, voucher Z. X. Fu 610, PE, Lushi county, Henan province, China, Photographs by Zhixi Fu). (B, D Chrysanthemum dabieshanense, voucher X. X. Zhu 089 CSH, Yingshan county, Hubei province, China. Photographs by Xinxin Zhu).

Figure 4. Distribution map of Chrysanthemum dabieshanense (black circles) in Anhui and Hubei provinces, China, based on the voucher specimen information.