GrassBase - The Online World Grass Flora

Descriptions

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

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

Ammophila

HABIT Perennial. Rhizomes elongated. Culms erect, or geniculately ascending; 50–85–120 cm long. Ligule an eciliate membrane. Leaf-blades stiff (2), or firm (1). Leaf-blade apex muticous (2), or pungent (1).

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 10–12.08–16 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded.

GLUMES Glumes persistent; reaching apex of florets (1), or exceeding apex of florets; thinner than fertile lemma (1), or similar to fertile lemma in texture (2). Lower glume lanceolate; 0.9–0.95–1 length of upper glume; chartaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous; without pits. Lower glume apex acute (2), or acuminate (1). Upper glume lanceolate; 1–1.166–1.3 length of adjacent fertile lemma; chartaceous; 1-keeled; 3 -veined. Upper glume surface asperulous. Upper glume apex acute (2), or acuminate (1).

FLORETS Fertile lemma lanceolate; chartaceous (2), or coriaceous (1); keeled; wingless; 5 -veined, or 6–7 -veined (1). Lemma surface asperulous (1), or scaberulous (2); unwrinkled; without grooves. Lemma apex entire (2), or dentate (1); 2 -fid (1/1); acute (2/2); muticous (2), or mucronate (1). Principal lemma awn subapical (1/1). Palea 0.9–0.9333–1 length of lemma; 2–4 -veined. Palea keels approximate; smooth (2), or scaberulous (1).

FLOWER Anthers 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; obovoid (1/1). Hilum linear; 0.8 length of caryopsis.

DISTRIBUTION Europe (1), or Africa (1), or Temperate Asia (1), or Australasia (1), or Pacific (1), or North America, or South America (1), or Antarctica (1).

Please cite this publication as detailed in How to Cite Version: 27th January 2014.