Avena nuda, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1980, Flora Europaea. Volume 5. Alismataceae to Orchidaceae (Monocotyledones), Cambridge: Cambridge University Press : 207

9. A. nuda L. , Demonstr. Pl. 3 (1753)

( A. sativa subsp. nuda (L.) Rouy ).

Stems 45-90 cm, glabrous, with a waxy bloom. Leaves up to 20 cm x 3-7 mm, scabridulous; ligule 2 -4 mm. Panicle up to 25 cm, rather contracted. Spikelets 20-30(-35) mm, with 2-4 florets. Glumes subequal, 7- to 9-veined. Lemma 15-20 mm, lanceolate, acuminate, glabrous; apex with 2 acuminate teeth 1—3(—4) mm; awn 15-20 mm, inserted about the middle of the lemma, not twisted below. Palea | as long as lemma. Rhachilla not disarticulating at maturity. 2/7= 14. Cultivated on a small scale, mainly in C. Europe, and rarely naturalized.

A. chinensis (Fischer ex Roemer & Schultes) Metzger , Eur. Cereal. 53 (1824), is cultivated in parts of W. & C. Europe. It is like 9 but is larger, with spikelets 25-35(-45) mm, with 3-7 florets, the lowest of which is sometimes awned, the others unawned. The lemma is 18-25 mm and entire or 2-denticulate at the apex.