Ligusticopsis miyiensis J. Q. Lei & X. J. He 2023, comb. nov.
Creators: name: Lei, Jia-Qing
name: Cai, Jing
name: Zhou, Song-Dong
name: He, Xing-Jin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Apiales
Apiaceae
Ligusticopsis
Ligusticopsis miyiensis

description: Ligusticopsis miyiensis (Franch.) J.Q. Lei & X.J. He, comb. nov. (Figs. 1, 2).
≡ Ligusticum glaucescens Franch. (1894: 134).
non Ligusticopsis glaucescens (H.Wolff) Lavrova & Kljuykov in Kljuykov & Lavrova (1994: 105) [≡ Pleurospermum glaucescens H. Wolff (1929: 114)]
Type:— CHINA. Yunnan: in pratis adumbratis prope Mo-che-tschin, ad cataractas supra Tapin-tze, 03 Oct 1882, Delavay (syntype P!: P03224789, P03224792, P03224793, P03224794, P03224795); Yunnan: in pratis montis Pee-ngaytze, supra Tapin-tze, 01 Sep 1882, Delavay 446 (lectotype P!: P03224790, designated by Pimenov 2017).
Description:— Perennial herbs. Plants 40–80 cm. Roots cylindric, thin. Stems erect, hollow, glabrous, striate, base clothed in fibrous remnant sheaths. Basal petioles 2–6 cm, with ovate sheaths, rachis densely pilose; blade ovatetriangular, 10–12 × 8–10 cm, 2-pinnate, primary pinnae 3–4 pairs, coriaceous; ultimate segments lanceolate, ca. 3– 5 × 1–1.5 mm, apex apiculate. Cauline leaves sessile, sheathing, blade similar to basal, reduced. Umbels terminal and lateral, 4–6 cm across; bracts 3–6, linear, entire, rarely apex 3-lobed or pinnate, marginal white membranous, caducous; rays 16–24, subequal, 2–4 cm, inner faces scabrous; bracteoles 9–11, linear, entire, rarely apex 3-lobed or pinnate, marginal white membranous, longer than umbellules. Calyx teeth conspicuous, subulate, ca. 0.3 mm. Petals white, obcordate, base cuneate. Styles longer than stylopodium; stylopodium conical. Fruit oblong, ca. 4.5 × 3.5 mm, glabrous, strongly compress dorsally; dorsal ribs filiform, slightly prominent, marginal ribs winged, wings ca. 0.8 mm; vittae 1–2 in each furrow, 4–6 on commissure. Seed face plane.
Phenology:— The species was found flowering in September to October, fruiting in October to November.
Diagnosis:— Ligusticopsis miyiensis is most similar to five validated Ligusticopsis species, being Ligusticopsis capillacea, Ligusticopsis hispida, Ligusticopsis modesta, Ligusticopsis scapiformis and Ligusticopsis brachyloba. However, Ligusticopsis miyiensis differed from them in having 2-pinnate leaf blades, ultimate segments of leaves lanceolate, bracts and bracteoles mainly linear, entire, with membranous margins, calyx teeth subulate, and mericarps oblong.
Distribution and habitat:— Ligusticopsis miyiensis is distributed in Yunnan (“Pee-ngay-tze” & “Mo-che-tchin, supra Tapin-tze”) and Sichuan (Miyi), China. It grows in hillside grasslands at elevations between 1600 and 2800 m.
Additional specimens examined:— CHINA. Yunnan: Zhongdian, Haba, 2800 m, 27°23′N, 100°10′E, 1963, anonymous 068400 (HITBC!). Sichuan: Miyi, Laoyamen, 1845 m, 27°2′33.22″N, 101°57′17.22″E, 10 Oct 2022, J. Q. Lei & J. Cai LC20221010001, LC20221010002, LC20221010003 (SZ!).
description: Published as part of Lei, Jia-Qing, Cai, Jing, Zhou, Song-Dong & He, Xing-Jin, 2023, Ligusticopsis miyiensis (Apioideae, Apiaceae), a new combination from China revealed by morphological and molecular evidence, pp. 273-282 in Phytotaxa 591 (4) on pages 278-279, DOI: 10.11646/phytotaxa.591.4.4, http://zenodo.org/record/7835539