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FOC | Family List | FOC Vol. 22 | Poaceae | Leymus

22. Leymus arjinshanicus D. F. Cui in N. R. Cui, Fl. Xinjiang. 6: 602. 1996.

阿尔金山赖草 a er jin shan lai cao

Plants with extended rhizomes. Culms tufted, erect, 30–70 cm tall, 2- or 3(or 4)-noded. Leaf sheath brown at base, glabrous, margin membranous, sometimes ciliolate; ligule ca. 0.5 mm, apex truncate; leaf blade 10–20 × ca. 0.3 cm, abaxial surface glabrous, adaxial surface puberulent. Spike erect or slightly curved, 4–10 × 0.6–0.8 cm; rachis internodes 5–7(–15) mm. Spikelets 1 per node; rachilla densely puberulent; internodes ca. 0.2 mm. Glumes linear-lanceolate, 1-veined, proximally glabrous or distally scabrous abaxially, margin shortly prickly, apex acuminate with point ca. 1 mm. Lemma broadly lanceolate, obscurely 5-veined, glabrous or margin ciliate; first lemma 10–12 mm, apex acuminate. Palea equaling lemma, distal half ciliate abaxially, apex slightly bifid. Anthers yellow, ca. 4 mm. Fl. and fr. Jul–Sep.

* Saline meadows; ca. 3100 m. Xinjiang (Altun Shan).

In the Chinese text of the protologue (p. 216) and in the illustration caption (p. 217), the specific epithet was spelled "aerginshani-cus," whereas in the Latin text (p. 602) it was spelled "arjinshanicus." Under Art. 61.3 of the Saint Louis Code, we here explicitly adopt "arjinshanicus" and reject "aerginshanicus."


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