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.

Parodiolyra

HABIT Perennial. Rhizomes absent (4), or short (2). Culms erect (2/5), or geniculately ascending (2/5), or scandent (4/5); 30–262.3–1040 cm long; firm (5), or woody (1); without nodal roots (1/2), or rooting from lower nodes (1/2). Culm-internodes terete (2/2). Culm-nodes swollen (3/3). Lateral branches sparse (1/1). Leaf-sheath auricles absent (4), or erect (2). Ligule an eciliate membrane (1), or a ciliolate membrane (4), or a ciliate membrane (1). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (1), or lanceolate, or oblong (1), or ovate (3); stiff (2), or firm (4). Leaf-blade venation without cross veins (5), or with distinct cross veins (1).

INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Inflorescence a panicle; terminal (4), or terminal and axillary (2).

Panicle open (5), or contracted (1). Primary panicle branches not whorled (5), or whorled at lower nodes (1).

Sexes segregated; on unisexual branches (3), or bisexual branches (5); with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled; 2 in a cluster (2/2), or 3 in a cluster (1/2). Pedicels filiform (3/4), or linear (1/4); tip rectangular (3/3).

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic (5), or ovate (2), or obovate (1); dorsally compressed; 2–4.607–12.8 mm long; falling entire (2), or breaking up at maturity (4); disarticulating below each fertile floret (4/4). Rhachilla internodes brief up to lowest fertile floret (1), or elongated between glumes (5), or elongated below proximal fertile floret (5).

GLUMES Glumes persistent (1/1); exceeding apex of florets; thinner than fertile lemma. Lower glume elliptic (3), or ovate (3); clasping (2/2); 0.9–1.016–1.1 length of upper glume; membranous (2), or chartaceous (3), or herbaceous (1); without keels; 3 -veined (1), or 5 -veined (3), or 6 -veined (1), or 7 -veined (3), or 8–9 -veined (2). Lower glume surface smooth (2), or scabrous (4); without pits; glabrous (5), or puberulous (2), or pubescent (3), or pilose (3). Lower glume apex obtuse (1/5), or acute (3/5), or acuminate (1/5), or caudate (1/5); muticous (5), or awned (1). Upper glume elliptic (3), or ovate (3); 1.2 length of adjacent fertile lemma; membranous (2), or chartaceous (3), or herbaceous (1); without keels; 3–4 -veined (2), or 5 -veined (5), or 6 -veined (2), or 7 -veined (3). Upper glume primary vein eciliate, or ciliolate (1). Upper glume lateral veins without cross-veins (2/4), or with cross-veins (4/4). Upper glume surface smooth (2), or scabrous (4); glabrous (5), or puberulous (2), or pubescent (3), or pilose (3), or hirsute (2), or villous (2), or hispidulous (2), or hispid (2). Upper glume apex acute (3/5), or acuminate (1/5), or caudate (1/5); muticous, or awned (1); 1 -awned (1/1).

FLORETS Fertile florets female. Fertile lemma lanceolate (2), or elliptic (2), or ovate (2), or obovate (1); dorsally compressed; indurate; without keel; wingless; 5 -veined (3/4), or 7 -veined (1/4). Lemma lateral veins obscure (1/1). Lemma surface smooth (4), or punctate (1), or pitted (1); unwrinkled; without grooves. Lemma margins flat (5), or involute (1). Lemma apex obtuse (1/5), or acute (3/5), or apiculate (1/5); without ornament (3), or with a shallow excavation (1), or papillose (2), or pubescent (1). Palea not rolled (5), or involute (1); 0.9 length of lemma; membranous (1), or indurate (5); 2 -veined (3/3); without keels (5), or 2-keeled (1).

FLOWER Lodicules 3; truncate (1/1). Anthers 3 (4/4). Stigmas 2 (5/5). Ovary glabrous (2/3), or with a few apical hairs (1/3).

FRUIT Caryopsis with adherent pericarp (1/1); ellipsoid (2/3), or orbicular (1/3). Embryo 0.2 length of caryopsis. Hilum linear (4/4); 0.5–0.75–1 length of caryopsis.

MALE Male spikelets distinct from female; linear (1/5), or lanceolate (4/5). Male spikelet glumes absent (5), or 2 (1). Male spikelet lemma muticous (5), or awned (1).

DISTRIBUTION South America.

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