Apera baytopiana

HABIT Annual; culms solitary, or caespitose. Culms erect, or geniculately ascending; 16–41 cm long; 3–4 -noded. Culm-internodes smooth; distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane; 1.2–3.7 mm long; lacerate; acuminate. Leaf-blades flat, or involute; 2.5–7 cm long; 0.7–1.5 mm wide. Leaf-blade surface puberulous; hairy adaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear, or lanceolate; 2.2–6.2 cm long; 0.5–1.7 cm wide. Primary panicle branches appressed; 0.4–1.5 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.3–1.1 mm long; scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2.4–2.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; exceeding apex of florets; shiny. Lower glume linear; 1.9–2 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn terminal; 0.8–1.5 mm long. Upper glume lanceolate; 2.5–2.7 mm long; 1.3–1.6 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn terminal; 0.4–0.7 mm long.

FLORETS Fertile lemma lanceolate; 1.5–2.1 mm long; membranous; without keel; 5 -veined. Lemma surface scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn subapical; straight; 1–2.3 mm long overall. Palea 1.4–1.6 mm long; 2 -veined.

FLOWER Anthers 3; 1.4–1.8 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Aveneae. Fl Turk 1997.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.