Chimonocalamus

HABIT Perennial. Rhizomes short; pachymorph. Culms erect; 150–501.1–1000 cm long; woody; with root thorns from the nodes (13/13). Culm-internodes terete (13), or quadrangular (1). Culm-nodes swollen (3/3). Lateral branches dendroid. Branch complement three (5/8), or several (4/8), or many (1/8); in a horizontal line (1/6), or in an irregular line (5/6); with subequal branches (3/4), or 3 branches dominant (1/4). Culm-sheaths tardily deciduous (1/9), or deciduous (8/9); without auricles (10/11), or auriculate (1/11). Culm-sheath blade linear (4/13), or lanceolate (6/13), or triangular (5/13). Leaf-sheath auricles absent (13), or falcate (1). Ligule an eciliate membrane (13), or a ciliolate membrane (1). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades persistent (8), or deciduous at the ligule (6); linear (8), or lanceolate (12), or oblong (1); herbaceous (13), or chartaceous (1). Leaf-blade venation without cross veins (7), or with distinct cross veins (7).

INFLORESCENCE Inflorescence a panicle (6/6).

Panicle open (6/6).

Spikelets solitary (6/6). Fertile spikelets pedicelled (6/6).

FERTILE SPIKELETS Spikelets comprising 2 fertile florets (1/6), or 3 fertile florets (3/6), or 4 fertile florets (2/6), or 5–6 fertile florets (4/6), or 7 fertile florets (5/6), or 8 fertile florets (3/6), or 9–10 fertile florets (1/6); with diminished florets at the apex (6/6). Spikelets linear (6/6); laterally compressed (6/6); 8–36.25–80 mm long; breaking up at maturity (6/6); disarticulating below each fertile floret (6/6). Rhachilla internodes definite (6/6); pubescent (1/6), or pilose (5/6).

GLUMES Glumes persistent (6/6); shorter than spikelet (6/6). Lower glume lanceolate (3/3), or ovate (2/3); chartaceous (3/3); 1-keeled (2/2); 3 -veined (1/2), or 5–9 -veined (1/2). Lower glume surface smooth (5/6), or scabrous (1/6); without pits (6/6); glabrous (5/6), or puberulous (1/6). Lower glume apex acute (3/3); muticous (2/3), or mucronate (1/3). Upper glume lanceolate (3/3), or ovate (3/3); chartaceous (3/3); without keels (3/3); 5 -veined (2/2), or 6–7 -veined (1/2). Upper glume surface smooth (4/6), or asperulous (1/6), or scabrous (1/6); glabrous (5/6), or puberulous (1/6). Upper glume apex acute (1/3), or acuminate (2/3); muticous (1/3), or mucronate (2/3).

FLORETS Fertile lemma lanceolate (6/6), or ovate (1/6); chartaceous (6/6); without keel (6/6); wingless (6/6); 5–6 -veined (1/3), or 7 -veined (2/3), or 9 -veined (1/3). Lemma surface unwrinkled (6/6); without grooves (6/6); glabrous (3/6), or pubescent (3/6). Lemma margins eciliate (5/6), or ciliate (1/6). Lemma apex acute (1/3), or acuminate (1/3), or setaceously attenuate (1/3). Palea 1–1.041–1.1 length of lemma. Palea keels eciliate (5/6), or ciliolate (1/6). Palea apex dentate (2/2); muticous (5/6), or with excurrent keel veins (1/6). Apical sterile florets resembling fertile though underdeveloped (6/6).

FLOWER Lodicules 3 (6/6); membranous (6/6); glabrous (3/6), or ciliate (3/6). Anthers 3 (6/6). Stigmas 2–3 (3/6). Ovary glabrous (3/3).

FRUIT Caryopsis with adherent pericarp (6/6).

DISTRIBUTION Temperate Asia (11), or Tropical Asia (4).

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