Carex humida Y.L.Chang & Y.L.Yan var. orhonensis L.Q.Zhao & Y.Xin, 2025

Alatanzhula, Yue Xin, Zhao, Liqing, Gundegmaa, Vanjil, Yao, Zhenyu & Ri, Xu, 2025, A new Carex L. variety and ten new records from China and Mongolia, Adansonia (3) 47 (10), pp. 157-170 : 158-160

Genus Carex L.

Carex humida Y.L.Chang & Y.L.Yan var. orhonensis L.Q.Zhao & Y.Xin , var. nov.

( Fig. 1)

TYPE MATERIAL. — Mongolia • Selenge, Orkhontul Sum , river flood plain; 6.VII.2017; L.Q. Zhao MG-092; holo-, HIMC[ HIMC0014424 ]; isolecto-, HIMC[ HIMC0014425 ] .

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DIAGNOSIS. — Carex humida var. orhonensis var. nov. is distinguished from Carex humida Y. L. Chang & Y. L. Yang by its densely pubescent lower sheaths, with dense pubescence also present on both its involucral bracts and bract sheaths. The female glumes are occasionally hispidulous on the upper part of the midrib and densely hispidulous on both sides and in the middle of the awn. Additionally, the utricle margins, surfaces, and the sides from the beak orifice to the beak tube are sparsely hairy ( Table 1).

ETYMOLOGY. — The specific epithet refers to Orkhontul Sum in Mongolia, where the species was found.

DISTRIBUTION AND HABITAT. — Carex humida is distributed in Heilongjiang, Jilin, Inner Mongolia in China, where it typically grows in moist environments such as watersides, swamps, ravines, swampy meadows, and gully meadows. C. humida var. orhonensis var. nov. is located in Selenge province, Mongolia, thriving in river floodplains. ADDITIONAL SPECIMENS EXAMINED. — China • Inner Mongolia, Chifeng, Baolin Youqi, Wulanba Forestry, ravine; 19.VII.2011; L.Q. Zhao 1653; HIMC[HIMC 0013253]! • Mirituba, 4.IX.2011, L.Q. Zhao 11-2845; HIMC[HIMC0013732]! • Chaganba, 18.VII.2011; L.Q. Zhao 1319; HIMC[HIMC0013562]!

NEW RECORDS FOR CHINA