Bupleurum chinense var. jeholense (Nakai) Q.R.Liu & L.H.Wang, 2024

Wang, Li-Hua, Xu, Xue-Min, He, Yi & Liu, Quan-Ru, 2024, The identity of Bupleurum jeholense (Apiaceae), PhytoKeys 237, pp. 231-243 : 231

Bupleurum chinense var. jeholense (Nakai) Q.R.Liu & L.H.Wang comb. nov.

Bupleurum jeholense - Bupleurum jeholense Nakai in J. Jap. Bot. 13: 482 (1937) - Bupleurum sibiricum var. jeholense (Nakai) Chu in Shan & Li, Acta Phytotax. Sin. 12 (3): 272 (1974).

Bupleurum jeholense latifolium = Bupleurum jeholense var. latifolium Nakai in J. Jap. Bot. 13: 482 (1937). Type. China. Hebei: Wuling Mountain, 1800 m, 2 Sept 1933, Nakai, Honda et Kitagawa s. n. (holotype: TI0082957!).

Type.

China. Hebei: Wuling Mountain , 1500-2000 m, 2 Sept 1933, Nakai, Honda et Kitagawa, s. n. (holotype: not barcode, fig in protologue pp 481!; isotypes: TI0082958! TI0082959! (Fig. 6 ) TI0082960! TI0082961!],

Diagnosis.

Bupleurum chinense var. jeholense is morphologically similar to var. Bupleurum chinense chinense and can be distinguished from the latter by plant size (>40 cm), the presence of multiple stems, with 1-2 branches per stem, thinner middle stem leaves, leaf length to width ratio 10-16, and the presence of 5 bracteoles.

Description.

Plants 20-40 cm, perennial. Root stout, brown, woody. Stem solitary or several, solid, petioles often purplish-red, clasping base without fibrous remnant sheaths. Basal leaves oblanceolate, 5-10 × 0.3-0.8 cm, base petioles, apex acuminate. Middle leaves sessile, oblanceolate, 4.5-12 × 0.4-1.4 cm, 7-9-nerved, base tapering, apex obtuse or acute, apiculate. Apical leaves small. Umbels 5-12, nearly equal or unequal rays 0.4-4 cm long; bracts of 1-5 unequal leaflets, often obsolete or deciduous, 3-15 × 0.6-11 mm, 4-7-nerved; bracteoles 5, lanceolate, 3-7 × 0.6-0.8 mm, exceeding flowers; umbellule 4-12 mm across, 8-14-flowered. Petals bright yellow. Stylopodium low-conic, discoid, dark yellow. Fruit oblong, brown, ca. 2.2-3.5 × 0.9-1.5 mm; ribs prominent, narrowly winged, wings pale brown; vittae 3(-4) in each furrow, 4 on commissure (Fig. 7 ). Fl. July-August and Fr. August-October. 2n = 12.

Phenology.

Flowering and fruiting from August to October.

Distribution and habit.

Hebei, Beijing. It grows in mountains at elevations of 1500-2000 m.

Additional specimens examined.

China. Beijing: Fangshan county, Jin-Wu Wang s.n. (PEY!); Mentougou county, Xiao-Liu QS-186 (BJFC!); Quan-Ru Liu 200609009 (BNU!); Xue Lin 05 05-4-114 (BJFC!); Gang-Min Zhang 201008036 (BJFC!); Xian-Yun Mu 1821 (BJFC!); Duan-Zheng Lu s.n. (BJFC!); Quan-Ru Liu DL 025-2 (BNU!); Quan-Ru Liu DL 026-2 (BNU!); Quan-Ru Liu DL 027-1 (BNU!); Miyun county , Xian-Yun Mu 1924 (BJFC!) . Hebei: Xinglong county , Li-Hua Wang BNU2021HB029 (BNU!); Li-Hua Wang BNU2021HB025 (BNU!); Jia-Yi Liu 0845 2190 (TIE!); Jin-Wu Wang s.n. (PEY!); Zhen-Fu Fang 825 (NAS!); Ze-Hui Pan 83940 (NAS!); Ze-Hui Pan 83939 (NAS!); Shen-E Liu 4833 (IFP!); Zhen-Fu Fang 826 (IFP!); Quan-Ru Liu WLS068 (BNU!); Xin-Yuan Liu 1652 (KUN!); Jia-Yi Liu 08450 (TIE!); Jia-Yi Liu 00485 (TIE!); Biaobenshi 2190 (PE!); Wu-Xiu Zhang 91 (PE!) .

Figures

Figure 6. Isotype of Bupleurum chinense var. jeholense (Photo from TI Herbarium).

Figure 7. Bupleurum chinense var. jeholense A plant B umbel and bract C flowers D umbel (side view) E pollen F transverse section of mericarp.