Pseudosasa

HABIT Perennial. Rhizomes absent (3), or elongated (18); leptomorph (18/18). Culms erect (16/16); 40–323.1–1300 cm long; woody; without nodal roots (1/1). Culm-internodes terete, or channelled (1). Culm-nodes flush with internodes (4/8), or swollen (4/8); with distinct supra-nodal ridge (2/2). Lateral branches suffrutescent (1), or dendroid (20). Branch complement one (11/20), or two (12/20), or three (15/20), or several (1/20); solitary (2/2); as thick as stem (2/2). Culm-sheaths persistent (4/11), or tardily deciduous (3/11), or deciduous but leaving a persistent girdle (1/11), or deciduous (5/11); without auricles (10/15), or auriculate (6/15). Culm-sheath blade linear (6/17), or lanceolate (14/17), or ovate (1/17), or triangular (3/17); narrower than sheath (1/3), or as wide as sheath at base (1/3), or cordate (1/3). Leaf-sheath auricles absent (16), or erect (2), or falcate (6). Ligule an eciliate membrane (11), or a ciliolate membrane (9), or a ciliate membrane (1). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (2), or lanceolate (20), or elliptic (4), or oblong (4); herbaceous (19), or chartaceous (2). Leaf-blade venation without cross veins (9), or with obscure cross veins (4), or with distinct cross veins (8).

INFLORESCENCE Inflorescence a panicle (4/8), or composed of racemes (3/8), or comprising only a few spikelets (1/8); exserted (7/8), or embraced at base by subtending leaf (2/8).

Panicle open (3/4), or contracted (1/4).

Racemes single (2/2); bearing 2 fertile spikelets on each (1/2), or 3–5 fertile spikelets on each (2/2).

Spikelets solitary (8/8). Fertile spikelets pedicelled (8/8).

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets (2/8), or 4 fertile florets (4/8), or 5–7 fertile florets (5/8), or 8 fertile florets (4/8), or 9 fertile florets (3/8), or 10–11 fertile florets (4/8), or 12 fertile florets (3/8), or 13–14 fertile florets (2/8); with diminished florets at the apex (8/8). Spikelets linear (6/8), or lanceolate (1/8), or oblong (1/8); laterally compressed (8/8); 10–31.62–60 mm long; breaking up at maturity (8/8); disarticulating below each fertile floret (8/8). Rhachilla internodes brief up to lowest fertile floret (7/8), or elongated between glumes (1/8); definite (8/8); glabrous (3/8), or pubescent (4/8), or pilose (2/8). Floret callus pubescent (1/2), or pilose (1/2).

GLUMES Glumes two (6/8), or several (2/8); persistent (8/8); shorter than spikelet (8/8). Lower glume lanceolate (5/5); 0.5–0.65–0.8 length of upper glume; chartaceous (5/5); without keels (5/5); 5 -veined (2/2), or 6–9 -veined (1/2). Lower glume surface without pits (8/8); glabrous (6/8), or puberulous (1/8), or pubescent (1/8). Lower glume apex acute (3/4), or acuminate (1/4). Upper glume lanceolate (4/7), or elliptic (1/7), or oblong (1/7), or ovate (1/7); 0.9–0.95–1 length of adjacent fertile lemma; chartaceous (5/5); without keels (5/5); 5–6 -veined (1/3), or 7–8 -veined (2/3), or 9 -veined (3/3), or 10–11 -veined (1/3). Upper glume surface glabrous (6/8), or puberulous (1/8), or pubescent (1/8). Upper glume apex acute (4/5), or acuminate (1/5).

FLORETS Fertile lemma lanceolate (1/8), or oblong (1/8), or ovate (8/8); chartaceous (8/8); without keel (8/8); wingless (8/8); 9 -veined (3/4), or 10–11 -veined (2/4), or 17–23 -veined (1/4). Lemma surface unwrinkled (8/8); without grooves (8/8); glabrous (5/8), or puberulous (2/8), or pubescent (2/8). Lemma margins eciliate (6/8), or ciliate (2/8). Lemma apex acute (1/6), or acuminate (5/6); muticous (8/8), or mucronate (1/8), or awned (1/8); 1 -awned (1/1). Palea 0.9–0.9833–1.1 length of lemma; membranous (7/8), or chartaceous (1/8); 2 -veined (2/3), or 8–10 -veined (1/3). Palea keels eciliate (1/8), or ciliolate (3/8), or ciliate (4/8). Palea surface glabrous (6/8), or pubescent (2/8). Palea apex entire (2/2). Apical sterile florets resembling fertile though underdeveloped (8/8).

FLOWER Lodicules 3 (8/8); glabrous (2/8), or ciliate (6/8). Anthers 3 (8/8), or 4 (1/8). Stigmas 2 (1/8), or 3 (6/8), or 33 (1/8). Ovary glabrous (4/5), or pubescent on apex (1/5).

FRUIT Caryopsis with adherent pericarp (8/8); oblong (1/2), or ovoid (1/2); apex unappendaged (2/2).

DISTRIBUTION Europe (1), or Africa (1), or Temperate Asia, or Tropical Asia (2), or Australasia (2).

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