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.

Eulalia

HABIT Annual (5), or perennial (30). Rhizomes absent (31), or short (2), or elongated (2). Stolons absent (34), or present (1). Culms erect (22/24), or geniculately ascending (3/24), or decumbent (1/24); slender (2/2); 7–69.26–200 cm long; firm (33), or wiry (2); rooting from lower nodes (2/2). Lateral branches lacking (3/3). Leaves differentiated into sheath and blade (34), or without demarcation between sheath and blade (1). Ligule an eciliate membrane (12), or a ciliolate membrane (19), or a ciliate membrane (2), or a fringe of hairs (3). Leaf-blade base without a false petiole (34), or with a brief petiole-like connection to sheath (1). Leaf-blades filiform (5), or linear (32), or lanceolate (3); stiff (2), or firm (32), or flaccid (1). Leaf-blade midrib indistinct (1/2), or widened (1/2).

INFLORESCENCE Inflorescence composed of racemes; exserted (34), or embraced at base by subtending leaf (1).

Racemes single (5), or paired (6), or digitate (30), or borne along a central axis (2); erect (2), or ascending (34); bearing 7–20 fertile spikelets on each (1/1). Rhachis tough (3), or fragile at the nodes (34); flattened (1/14), or angular (2/14), or subterete (11/14). Spikelet packing contiguous (34), or lax (1). Rhachis internodes filiform (1), or linear (33), or clavate (1). Rhachis internode tip transverse (28/30), or oblique (2/30); cupuliform (2/2).

Spikelets in pairs. Fertile spikelets sessile and pedicelled (34), or pedicelled (3); 2 in the cluster. Pedicels filiform (1), or linear (34); tip cupuliform (1/1).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear (1), or lanceolate (15), or elliptic (16), or oblong (5), or cuneate (1); dorsally compressed; 1.5–4.138–8 mm long; falling entire; deciduous from the base, or with accessory branch structures (34). Spikelet callus brief (24), or square (10), or oblong (1); pubescent (7/24), or pilose (6/24), or bearded (12/24); base obtuse (34), or acute (1); attached transversely (28), or attached obliquely (6), or inserted (1).

GLUMES Glumes reaching apex of florets (1), or exceeding apex of florets (34); firmer than fertile lemma. Lower glume lanceolate (6), or elliptic (22), or oblong (12); chartaceous (19), or cartilaginous (11), or coriaceous (5); without keels (2), or 2-keeled (33); 2 -veined (10/16), or 3 -veined (1/16), or 4 -veined (3/16), or 5 -veined (1/16), or 6 -veined (3/16), or 7–9 -veined (1/16). Lower glume lateral veins obscure (1), or distinct (34); intercarinal veins absent (3/8), or obscure (1/8), or distinct (5/8). Lower glume surface convex (12), or flat (15), or concave (14), or with a longitudinal median groove (1); without pits; glabrous (8), or pilose (18), or hirsute (2), or villous (8). Lower glume apex entire (22), or erose (1), or dentate (12); 2 -fid (12/12); emarginate (1/20), or truncate (12/20), or obtuse (6/20), or acute (3/20), or acuminate (1/20); muticous (31), or awned (4). Upper glume lanceolate (13), or elliptic (14), or oblong (8), or ovate (1); chartaceous (8/10), or coriaceous (2/10); with undifferentiated margins (33), or hyaline margins (1), or membranous margins (1); without keels (1/23), or 1-keeled (21/23), or 2-keeled (1/23); 1 -veined (12/20), or 2 -veined (2/20), or 3 -veined (9/20), or 5–7 -veined (1/20). Upper glume primary vein eciliate (32), or ciliate (4). Upper glume surface glabrous (13), or puberulous (1), or pubescent (2), or pilose (19), or villous (1); without hair tufts (34), or with a dorsal tuft of hair (1). Upper glume apex entire (32), or dentate (3); 2 -fid (3/3); emarginate (1/13), or truncate (6/13), or obtuse (5/13), or acute (1/13), or acuminate (2/13); muticous (24), or mucronate (2), or awned (9); 1 -awned (9/9).

FLORETS Basal sterile florets barren (31/31); with palea (1/31), or without significant palea (30/31). Lemma of lower sterile floret linear (5/22), or lanceolate (6/22), or elliptic (2/22), or oblong (10/22), or ovate (3/22); hyaline (24/27), or membranous (3/27); 0 -veined (12/14), or 2 -veined (2/14); truncate (1/14), or obtuse (11/14), or acute (1/14), or acuminate (1/14). Fertile lemma linear (5/33), or lanceolate (6/33), or elliptic (3/33), or oblong (17/33), or ovate (1/33), or orbicular (1/33), or obovate (1/33), or cuneate (1/33); hyaline (34), or membranous (1); without keel; wingless; 0 -veined (1/15), or 1 -veined (9/15), or 2 -veined (1/15), or 3 -veined (6/15). Lemma surface unwrinkled; without grooves. Lemma margins eciliate (27), or ciliolate (6), or ciliate (2). Lemma apex entire (3), or erose (1), or dentate (8), or lobed (23); 2 -fid (31/31); incised 0.25–0.4265–0.5 of lemma length; truncate (1/2), or acute (1/2); muticous (2), or awned (34); 1 -awned (34/34). Principal lemma awn apical (3/34), or from a sinus (31/34); geniculate (31/34), or bigeniculate (3/34); limb glabrous (32/34), or puberulous (1/34), or pubescent (1/34). Column of lemma awn glabrous (27/34), or hispidulous (6/34), or ciliate (1/34). Palea present (13), or absent or minute (22); hyaline (5/13), or membranous (8/13); 0 -veined (1/1). Palea surface glabrous (12/13), or pilose (1/13).

FLOWER Lodicules 2 (2/2); truncate (1/1). Anthers 3 (33/33).

FRUIT Caryopsis with adherent pericarp (6/6); oblong (1/2), or obovoid (1/2). Embryo 0.5 length of caryopsis. Hilum punctiform (1/1).

DISTRIBUTION Africa (3), or Temperate Asia (15), or Tropical Asia (27), or Australasia (6).

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