GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Polypogon ivanovae

HABIT Perennial; caespitose; clumped loosely. Culms geniculately ascending; 8–20 cm long. Culm-internodes smooth; distally glabrous. Ligule a ciliolate membrane; 2–4.5 mm long; scaberulous on abaxial surface. Leaf-blades flat, or conduplicate; 3–20 cm long; 0.8–2.5 mm wide. Leaf-blade surface scaberulous; rough on both sides.

INFLORESCENCE Inflorescence a panicle. Peduncle scaberulous above.

Panicle contracted; linear; 2.5–7 cm long; 0.5–1.5 cm wide. Primary panicle branches 4 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.7–2.5 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 2.2–2.8 mm long; falling entire; deciduous with the pedicel.

GLUMES Glumes similar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 2.2–2.8 mm long; 1 length of upper glume; membranous; 1-keeled; keeled above; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex obtuse; awned; 1 -awned. Lower glume awn 0.5–2 mm long. Upper glume oblong; 2.2–2.8 mm long; 2 length of adjacent fertile lemma; membranous; 1-keeled; keeled above; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex obtuse; awned; 1 -awned. Upper glume awn 0.5–2 mm long.

FLORETS Fertile lemma ovate; 1.4–1.7 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface smooth; glabrous. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; straight, or curved; 2.3–3.5 mm long overall. Palea 0.66 length of lemma; hyaline; 2 -veined.

FLOWER Anthers 3; 0.2–0.8 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Tsvelev 2001.

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