Semiarundinaria

HABIT Perennial. Rhizomes elongated; leptomorph, or pachymorph (1). Culms erect; 100–542.2–1000 cm long; woody. Culm-internodes terete (6), or channelled (2). Culm-nodes flush with internodes (1/1). Lateral branches dendroid. Branch complement three (7/7), or several (5/7); in a horizontal line (6/6); with subequal branches (3/3), or 3 branches dominant (1/3); thinner than stem (2/2). Culm-sheaths deciduous (4/4); without auricles (6/7), or auriculate (1/7). Culm-sheath blade linear (5/6), or lanceolate (3/6). Leaf-sheath auricles absent (7), or falcate (1). Ligule an eciliate membrane (1/7), or a ciliolate membrane (6/7). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (1), or lanceolate, or elliptic (3). Leaf-blade venation without cross veins (4), or with distinct cross veins (4).

INFLORESCENCE Synflorescence simple (1/7), or bractiferous (6/7); fasciculate (6/6); with spathaceous subtending bracts (6/6); without axillary buds at base of spikelet (6/6). Inflorescence comprising only a few spikelets (1/1).

Spikelets solitary (1/1). Fertile spikelets sessile (7/7).

FERTILE SPIKELETS Spikelets comprising 2 fertile florets (1/7), or 3–4 fertile florets (3/7), or 5 fertile florets (4/7), or 6 fertile florets (3/7), or 7 fertile florets (1/7); with diminished florets at the apex (7/7). Spikelets linear (4/7), or lanceolate (3/7); laterally compressed (7/7); 30–51.25–100 mm long; breaking up at maturity (7/7); disarticulating below each fertile floret (7/7). Rhachilla internodes definite (7/7); glabrous (4/7), or sparsely hairy (2/7), or pubescent (1/7).

GLUMES Glumes one the lower absent or obscure (4/7), or two (5/7); persistent (7/7); shorter than spikelet (6/6). Lower glume elliptic (2/3), or ovate (1/3); 0.8–0.925–1 length of upper glume; chartaceous (3/3); without keels (3/3); 7 -veined (1/1). Lower glume surface without pits (5/5). Lower glume apex acute (3/3). Upper glume lanceolate (1/5), or elliptic (2/5), or ovate (2/5); 0.7–0.75–0.8 length of adjacent fertile lemma; chartaceous (5/5); without keels (5/5); 7 -veined (1/1). Upper glume apex acute (5/5).

FLORETS Fertile lemma elliptic (2/7), or oblong (2/7), or ovate (3/7); chartaceous (7/7); without keel (7/7); wingless (7/7); 7–8 -veined (1/6), or 9 -veined (3/6), or 10 -veined (1/6), or 11 -veined (2/6), or 12 -veined (1/6), or 13 -veined (3/6). Lemma surface smooth (5/7), or scabrous (2/7); unwrinkled (7/7); without grooves (7/7); glabrous (5/7), or puberulous (2/7). Lemma margins eciliate (6/7), or ciliate (1/7). Lemma apex acute (1/7), or acuminate (5/7), or cuspidate (1/7). Palea 0.9–0.9875–1 length of lemma; membranous (4/7), or coriaceous (3/7); 6–7 -veined (1/4), or 11–13 -veined (2/4). Palea keels eciliate (1/7), or pubescent (1/7), or ciliolate (4/7), or ciliate (1/7). Palea surface glabrous (5/7), or pubescent (2/7). Palea apex entire (1/2), or dentate (2/2); muticous (4/7), or with excurrent keel veins (3/7). Apical sterile florets resembling fertile though underdeveloped (7/7).

FLOWER Lodicules 3 (7/7); membranous (1/1); ciliate (7/7). Anthers 3 (7/7). Stigmas 2 (1/7), or 3 (6/7). Ovary unappendaged (6/7), or umbonate (1/7); glabrous (3/3).

FRUIT Caryopsis with adherent pericarp (6/6).

DISTRIBUTION Europe (1), or Temperate Asia, or Australasia (1).

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