×elyhordeum schaackianum
Culms about 100 cm. Sheaths glabrous, smooth; ligules about 0.7 mm, truncate; blades 6-10 mm wide, flat, adaxial surfaces sparsely hairy, hairs about 0.8 mm. Inflorescences spikelike, 9-11 cm long, 10-12 mm wide, lax, with (2)3 spikelets per node. Spikelets with 1-2 florets, the second floret, if present, rudimentary, the lateral spikelets shortly pedicellate, the central spikelet sessile or nearly so. Glumes narrow, coarse, unawned or awned, awns to 15 mm; lemmas mostly glabrous, margins shortly hairy distally, apices unawned or awned, awns to 15(20) mm. 2n = 28.
Discussion
×Elyhordeum schaackianum consists of hybrids between Elymus hirsutus and Hordeum brachy¬antherum. It is known only from Attu Island, Alaska, and the Queen Charlotte Islands, British Columbia.
Selected References
None.