Raddia stolonifera

HABIT Perennial; caespitose. Stolons present. Culms erect; (23.5–)33–50 cm long; 0.5–1 mm diam. Culm-internodes distally pilose. Culm-nodes brown; pubescent. Lateral branches lacking. Leaves cauline; 13–21 per branch; distichous. Leaf-sheaths pilose. Ligule a ciliolate membrane; 0.5–0.7 mm long. Leaf-blade base truncate, or broadly rounded; symmetrical, or asymmetrical; with a brief petiole-like connection to sheath; petiole 0.05–0.1 cm long; petiole pubescent. Leaf-blades lanceolate, or ovate; 3.5–5.4 cm long; 7–15 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acute; asymmetrical and apiculate.

INFLORESCENCE Monoecious; with male and female spikelets in different inflorescences. Inflorescence composed of racemes; axillary; with 1–2 peduncles per sheath. Peduncle 2.7–3.8 cm long.

Racemes 1; single; 1.8–2.5(–3) cm long; 2–4 mm wide; bearing few fertile spikelets; bearing 3–6(–8) fertile spikelets on each. Rhachis angular.

Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels filiform (male), or cuneate (female); scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; dorsally compressed; 4–6.8 mm long; 1–2 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate, or ovate; 3–6.8 mm long; chartaceous; much thinner on margins; without keels; 3(–5) -veined. Lower glume apex acuminate; mucronate, or awned; 1 -awned. Lower glume awn 0.5–2 mm long. Upper glume lanceolate, or ovate; 3–6.8 mm long; chartaceous; with cartilaginous margins; without keels; 3(–5) -veined. Upper glume apex acute, or acuminate.

FLORETS Fertile florets female. Fertile lemma lanceolate; (3.2–)4–4.7 mm long; 0.7–1.2 mm wide; coriaceous; without keel. Lemma margins involute. Lemma apex obtuse. Palea coriaceous.

FLOWER Lodicules 3. Anthers 3.

MALE Male inflorescence axillary; unlike female; a panicle (1.5–3.3cm). Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 5.5–6 mm long; glabrous. Male spikelet glumes absent. Male spikelet lemma 3 -veined; awned; with 0.8 mm long awn.

DISTRIBUTION South America: Brazil.

NOTES Olyreae. Oliveira & L-Wagner 2009.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.