Gaudinia P.Beauv.

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Morphology General Habit

Annual. Culms erect (3), or geniculately ascending; 8-20.12-33 cm long. Ligule an eciliate membrane. Leaf-blades linear, or lanceolate (1).

Morphology Reproductive morphology Inflorescences

Inflorescence composed of racemes; exserted (3), or embraced at base by subtending leaf (1). Racemes single; unilateral (1), or bilateral (3). Rhachis fragile at the nodes; flattened (3), or angular (1). Spikelet packing broadside to rhachis; 2 -rowed (1/1). Rhachis internodes linear (3), or clavate (1); falling with spikelet above. Spikelets appressed; solitary. Fertile spikelets sessile.

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets comprising 3-5 fertile florets (3), or 6 fertile florets (2), or 7-8 fertile florets (1); with diminished florets at the apex. Spikelets lanceolate (1), or cuneate (3); laterally compressed; 6-11-20 mm long; falling entire; deciduous with accessory branch structures. Rhachilla internodes glabrous (3), or sparsely hairy (1).

Fertile

Spikelets comprising 3-5 fertile florets (3), or 6 fertile florets (2), or 7-8 fertile florets (1); with diminished florets at the apex. Spikelets lanceolate (1), or cuneate (3); laterally compressed; 6-11-20 mm long; falling entire; deciduous with accessory branch structures. Rhachilla internodes glabrous (3), or sparsely hairy (1).

Morphology Reproductive morphology Inflorescences Bracts Glume

Glumes shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate (3), or oblong (1); 0.5-0.6325-0.9 length of upper glume; chartaceous (1), or herbaceous (3); without keels (1), or 1-keeled (3); 3 -veined (3), or 5-7 -veined (1). Lower glume lateral veins without ribs (3), or ribbed (1). Lower glume surface smooth (3), or scabrous (2); glabrous (3), or pubescent (1), or villous (2). Lower glume apex obtuse (1), or acute (3). Upper glume oblong, or obovate (1); 0.8-1.037-1.2 length of adjacent fertile lemma; chartaceous (1), or herbaceous (3); with undifferentiated margins (3), or membranous margins (1); without keels (1), or 1-keeled (3); 5-6 -veined (3), or 7 -veined, or 8-11 -veined (1). Upper glume lateral veins ribbed. Upper glume surface smooth (3), or scabrous (2); glabrous (3), or pubescent (1), or villous (2). Upper glume apex emarginate (1), or obtuse (2), or acute (2).

Morphology Reproductive morphology Flowers Florets

Fertile lemma lanceolate (3), or oblong (1); cartilaginous (1), or coriaceous (3); of similar consistency on margins (1), or much thinner on margins (3); without keel (1), or keeled (3); 5 -veined (1), or 7-9 -veined (3). Lemma lateral veins obscure (3/3). Lemma surface glabrous, or villous (1). Lemma apex acute (2), or acuminate (2); muticous (1), or awned (3); 1 -awned (3/3). Principal lemma awn dorsal (3/3); straight (1/3), or curved (1/3), or geniculate (2/3). Palea 0.9-0.925-1 length of lemma; 2 -veined. Palea keels smooth (3), or scaberulous (1); eciliate (2), or ciliolate (1), or ciliate (1). Apical sterile florets resembling fertile though underdeveloped.

Morphology Reproductive morphology Flowers

Anthers 3. Ovary pubescent all over (3/3).

Morphology Reproductive morphology Fruits

Caryopsis with adherent pericarp (3/3); oblong (3/3). Embryo 0.33 length of caryopsis. Hilum punctiform.

Distribution

Europe (2), or Africa (3), or Temperate Asia (1), or Australasia (1), or South America (1).