Corylus heterophylla var. sutchuenensis Franch.

Holstein, Norbert, Tamer, Sarah el & Weigend, Maximilian, 2018, The nutty world of hazel names - a critical taxonomic checklist of the genus Corylus (Betulaceae), European Journal of Taxonomy 409, pp. 1-45 : 24-25

10b. Corylus heterophylla var. sutchuenensis Franch.

Journal de Botanique (Morot) 13: 199 ( Franchet 1899). – C. sutchuensis (Franch.) Nakai , Journal of Japanese Botany 15 (9): 524 ( Nakai 1939). – C. kweichowensis var. sutchuenensis (Franch.) C.C.Yang, Flora Sichuanica 21: 5 (Editorial Board of the Flora Sichuanica 2012) nom. illegit. superfl. – Type: China, Sichuan, Tchen keou tin, 1400 m a.s.l., P.G. Farges 805 [originally cited “ 809 ”] (lecto-, designated here: P06810915!; isolecto-: B!, B!, P06810916!, P06810917!). – Note: Corylus heterophylla var. sutchuenensis was recognized in the Flora of China ( Li & Skvortsov 1999) and the World Checklist and Bibliography of Fagales ( Govaerts & Frodin 1998) while it was regarded as a variety of a distinct C. kweichowensis in the Flora Sichuanica (Editorial Board of the Flora Sichuanica 2012).

C. heterophylla var. crista-galli Burkill, The Journal of the Linnean Society. Botany 26: 504 ( Burkill 1899). – Type: China, Hunan, Shimên, Mar. 1886, A. Henry 7942 (lecto-, designated here: K000859899!). – Additional type material: China, Hubei, Patung, Sep. 1886, A. Henry 1449 (syn-: K000859898!, K000859900!, K000859903!, P06809382!); China, Hubei, Ichang, Feb. 1887, A. Henry 2854 (syn-: K000859903!); China, Hubei, Ichang, Feb. 1887, A. Henry 2866 (syn-: K000859900!); China, Hubei, Tungku, Mar. 1889, A. Henry 6413 (syn-: BM!, GH00033780, K000859901!, K000859902!, P06809384!); China, Yunnan, “gorges of Lanho near Lankong”, 7 Aug. 1883, J.M. Delavay 128 (syn-: P06810940!). – Additional original material: China, Yunnan, les bois à Yang in Chang près de Lankong, 7 Aug. 1883, J.M. Delavay 128 (K!, P06810941!). – Note: this variety is mainly characterized by the long glandular trichomes especially on the petioles. Specimens of Delavay bearing the Delavay’s original number 128 (see Holstein & Weigend 2016a) were likely collected at different localities. Burkill, however, only cited one of these gatherings, being “gorges of Lanho near Lankong”. The collections from “les bois à Yang in Chan près Lankong” from the same date (K!, P06810941!) are not syntypes, but may be regarded as original material. However, they differ in being somewhat tomentose and lacking glandular trichomes on the petioles and the lower leaf lamina, linking to C. yunnanensis . The specimen chosen as a lectotype here shows the double-serrate bract margin as a name-giving character for this taxon, as well as the young male catkins that typically develop in C. heterophylla as the fruits mature.

C. kweichowensis Hu , Bulletin of the Fan Memorial Institute of Biology n.s., 1: 149 ( Hu 1948). – Type: China, Kweichow [Guizhou], Ichaipa, Longli County [ƭ$5], 6 Jul. 1930, Y. Tsiang [ƚƛ] 8441 (lecto-, designated here: PE00021973!; isolecto-: PE00734547!). – Note: the collection number 8411 in the protologue is mistaken, because Y. Tsiang 8411 is a species of Pyrus , conversely Y. Tsiang 8441 is a Corylus and matches the other collection data from the protologue. Corylus kweichowensis is regarded by Liang (1988) as a distinct species (with a distinct C. heterophylla var. sutchuensis ) and treated as such in the Flora Sichuanica (Editorial Board of the Flora Sichuanica 2012).

C. kweichowensis var. brevipes W.J.Liang , Bulletin of Botanical Research. Harbin 8 (4): 117 ( Liang 1988). – Type: China, Jiangxi, 990 m a.s.l., 18 Sep. 1984, W.J. Liang 84001 (holo-: IFP03404999za001!).