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.

Danthoniopsis

HABIT Annual (1), or perennial (15). Rhizomes absent (14), or elongated (2). Culms erect (10/12), or geniculately ascending (3/12), or decumbent (2/12); slender (1/1); 10–100.6–300 cm long; firm (14), or woody (2); rooting from lower nodes (1/1). Culm-internodes terete (1/1). Lateral branches lacking (2/3), or sparse (1/3). Leaf-sheath auricles absent (15), or erect (1). Ligule a fringe of hairs. Leaf-blade base without a false petiole (15), or with a false petiole (1). Leaf-blades persistent (15), or deciduous at the ligule (1); filiform (2), or linear (11), or lanceolate (6); stiff (2), or firm (14). Leaf-blade margins cartilaginous (3/3). Leaf-blade apex muticous (15), or pungent (1).

INFLORESCENCE Inflorescence a panicle.

Panicle open (11), or contracted (6).

Spikelets solitary (12), or in pairs (3), or in threes (4). Fertile spikelets pedicelled; 1 in the cluster (1/7), or 2 in the cluster (3/7), or 3 in the cluster (4/7); subequal (1/1).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate (6), or elliptic (3), or oblong (14); laterally compressed; 3.735–9.262–20 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; glabrous (2), or pubescent (6), or pilose (1), or bearded (8); truncate (9), or obtuse (6), or 2-toothed (1).

GLUMES Glumes persistent; shorter than spikelet (5), or reaching apex of florets (11); thinner than fertile lemma; parallel to lemmas (11), or gaping (5). Lower glume lanceolate (3), or elliptic (4), or oblong (6), or ovate (11); 0.33–0.6306–1 length of upper glume; membranous (3), or chartaceous (15); without keels; 3 -veined (14), or 4 -veined (2), or 5 -veined (3), or 7 -veined (1). Lower glume surface smooth (14), or asperulous (2); without pits; glabrous (13), or puberulous (3), or pubescent (3), or pilose (2). Lower glume apex obtuse (1), or acute (10), or acuminate (4), or cuspidate (1), or caudate (1); muticous (13), or mucronate (4). Upper glume lanceolate (9), or elliptic (2), or oblong (4), or ovate (6); membranous (1), or chartaceous (15); without keels; 3 -veined (11), or 4 -veined (2), or 5 -veined (5), or 7–8 -veined (1), or 9 -veined (2). Upper glume surface smooth (14), or asperulous (2); glabrous (14), or puberulous (1), or pubescent (3), or pilose (2). Upper glume apex entire, or dentate (1); 2 -fid (1/1); obtuse (3), or acute (4), or acuminate (7), or rostrate (1), or caudate (3); muticous (15), or mucronate (1).

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret lanceolate (6), or elliptic (5), or oblong (6), or ovate (7); membranous; 3 -veined (1), or 5 -veined (8), or 6 -veined (5), or 7 -veined (12), or 8–9 -veined (2); truncate (2/15), or acute (8/15), or acuminate (5/15), or caudate (1/15); muticous (13), or mucronate (3). Palea of lower sterile floret wingless (13), or winged on keels (3). Fertile lemma lanceolate (2), or oblong (15); coriaceous; without keel; wingless; 5 -veined (5), or 6 -veined (3), or 7 -veined (8), or 9 -veined (5), or 10 -veined (1), or 11 -veined (2). Lemma surface unwrinkled; without grooves; glabrous (5), or pubescent (2), or pilose (9); without hair tufts (3), or with a transverse row of hair tufts (11), or with a transverse fringe of hair (2). Lemma margins involute; interlocking with palea keels; eciliate, or ciliate (1). Lemma apex dentate (1), or lobed (15); 2 -fid; incised 0.1–0.3062–0.5 of lemma length; acuminate (1/1); awned; 1 -awned (13), or 3 -awned (3). Principal lemma awn from a sinus; geniculate. Column of lemma awn glabrous (15), or pubescent (1). Lateral lemma awns shorter than principal (3/3). Palea 0.7 length of lemma; 2 -veined. Palea keels separated (1), or approximate (10), or contiguous above a sulcus (5); unthickened (2), or thickened (14); wingless (1), or winged (15); with entire wings (11/15), or toothed wings (2/15), or clavate appendages on wings (2/15); eciliate (13), or ciliolate (2), or ciliate (1). Palea surface glabrous (14), or pubescent (2).

FLOWER Lodicules 2 (6/6); fleshy (5/5). Anthers 3 (15/15). Ovary glabrous (2/2).

FRUIT Caryopsis with adherent pericarp (15/15); fusiform (1/4), or ellipsoid (1/4), or oblong (1/4), or ovoid (1/4), or obovoid (1/4); isodiametric (1/2), or flattened (1/2); biconvex (1/1). Hilum linear (2/2).

DISTRIBUTION Africa (15), or Temperate Asia (2), or Tropical Asia (1).

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