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.

Agrostis tilenii

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms erect; 6–17 cm long; 2–3 -noded. Leaf-sheaths antrorsely scabrous. Ligule an eciliate membrane; 3–4 mm long; 2.5–3 mm long on basal shoots; lacerate. Leaf-blades conduplicate; 1.5–12 cm long; 0.4–1.7 mm wide; glaucous. Leaf-blade surface scabrous; rough on both sides.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 1.5–8 cm long; 0.4–1 cm wide. Primary panicle branches appressed; 2–4 -nate. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous; tip widened.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension, or with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; 2.2–2.3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.3 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous; rough above. Lower glume apex acute. Upper glume lanceolate; 2.2–2.3 mm long; 1–1.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous; rough above. Upper glume apex acute.

FLORETS Fertile lemma ovate; 1.5–2.3 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface scabrous; rough below. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; geniculate; 1 mm long overall; with twisted column. Palea oblong; 2 mm long; 0.2 length of lemma; hyaline; 2 -veined. Apical sterile florets 1 in number; barren; lanceolate; 0.5 mm long. Apical sterile lemmas awned; 1 -awned. Apical sterile lemma awns 0.5 mm long.

FLOWER Lodicules 2; lanceolate; 0.3 mm long; membranous. Anthers 3; 1–1.7 mm long. Stigmas 2; laterally exserted.

FRUIT Caryopsis with adherent pericarp; 1.7 mm long; apex unappendaged. Hilum linear. Endosperm farinose.

DISTRIBUTION Europe: southwestern.

NOTES Aveneae. Garcia 1996.

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