Raddia Bertol.

nonem

Morphology General Habit

Perennial. Rhizomes short. Culms erect (2/2); 26.6-49.03-100 cm long; without nodal roots. Culm-nodes constricted (2/2). Lateral branches lacking (1/1). Ligule a ciliolate membrane (1), or a ciliate membrane (1), or absent (1). Leaf-blade base with a brief petiole-like connection to sheath (2), or with a false petiole (1). Leaf-blades lanceolate (1), or elliptic (1), or oblong (1), or ovate (1), or triangular (1). Leaf-blade venation with distinct cross veins.

Morphology Reproductive morphology Inflorescences

Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on a specialized culm bearing a single leaf-blade, or on a separate leafless culm. Inflorescence a panicle. Panicle open (2), or spiciform (1). Primary panicle branches not whorled (1), or whorled at lower nodes (2). Sexes segregated; on unisexual branches (1), or bisexual branches (2); with male below. Spikelets solitary, or in pairs (2). Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels linear (1/1); tip pyriform (1/1).

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 1-7.216-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Male spikelets distinct from female; linear (2), or lanceolate (1), or elliptic (1). Male spikelet glumes absent. Male spikelet lemma muticous (2), or awned (2).

Fertile

Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 1-7.216-12 mm long; breaking up at maturity; disarticulating below each fertile floret.

Morphology Reproductive morphology Inflorescences Bracts Glume

Glumes deciduous; exceeding apex of florets; thinner than fertile lemma, or similar to fertile lemma in texture (2). Lower glume elliptic (1), or oblong (1), or ovate; 1 length of upper glume; membranous (1/1); without keels; 5 -veined. Lower glume surface convex (2), or concave (1); glabrous (1), or puberulous (1), or pubescent (2). Lower glume apex acuminate; muticous (1), or awned (2). Upper glume elliptic (1), or oblong (1), or ovate; 1.1-1.183-1.25 length of adjacent fertile lemma; membranous (1/1); with cartilaginous margins; without keels; 3 -veined. Upper glume lateral veins with cross-veins. Upper glume surface glabrous (1), or puberulous (1), or pubescent. Upper glume apex acuminate (1), or attenuate (2).

Morphology Reproductive morphology Flowers Florets

Fertile florets bisexual (2), or female (1). Fertile lemma elliptic, or oblong (1), or ovate (1); herbaceous (2), or indurate; without keel; 5 -veined. Lemma surface smooth (1), or punctate (1), or pitted (1). Lemma margins covering most of palea; eciliate (2), or pubescent (1). Lemma apex acute (1/1). Palea 0.9-1.016-1.1 length of lemma; membranous (2), or indurate; 2 -veined (2/2); without keels.

Morphology Reproductive morphology Flowers

Lodicules 3. Anthers 3 (1/1). Stigmas 2 (2/2).

Morphology Reproductive morphology Fruits

Caryopsis with adherent pericarp (1/1); pitted (1/1). Hilum linear.

sex Male

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

Distribution

South America.