Poaceae
Raddia

Raddia lancifolia R.P.Oliveira & Longhi-Wagner

First published in Pl. Syst. Evol. 270: 175 (2008)
This species is accepted
The native range of this species is Brazil (Espírito Santo). It is a herbaceous bamboo and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes elongated. Culms erect; (40-)45-85 cm long; 1.2-1.7 mm diam. Culm-internodes distally pilose. Culm-nodes green; glabrous. Lateral branches lacking. Leaves cauline; 4-11 per branch. Leaf-sheaths pilose. Ligule a ciliolate membrane; 0.8-1.3 mm long. Leaf-blade base symmetrical; with a brief petiole-like connection to sheath; petiole (0.08-)0.1-0.2 cm long; petiole pubescent. Leaf-blades lanceolate; 9.3-17.3 cm long; 12-21 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acute; asymmetrical and apiculate.
Morphology Reproductive morphology Inflorescences
Monoecious; with male and female spikelets in different inflorescences. Inflorescence composed of racemes; axillary; with 1-2 peduncles per sheath. Peduncle (2-)2.5-6.2(-8) cm long. Racemes 1; single; 2-5 cm long; 3-6 mm wide; bearing few fertile spikelets; bearing 4-13 fertile spikelets on each. Rhachis angular; scabrous on surface. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels filiform (male), or cuneate (female); pubescent. Male inflorescence terminal and axillary; unlike female; a panicle (3,4-8cm). Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 5.5-7.8 mm long; hairy. Male spikelet glumes absent. Male spikelet lemma 3 -veined; awned; with 1.5-3 mm long awn.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; dorsally compressed; (6-)7-13.5 mm long; 1-2(-3) mm wide; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; dorsally compressed; (6-)7-13.5 mm long; 1-2(-3) mm wide; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate, or ovate; 4-11.5(-13) mm long; chartaceous; much thinner on margins; without keels; 5-7 -veined. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn (1-)3-7(-10) mm long. Upper glume lanceolate, or ovate; 4-11.5(-13) mm long; chartaceous; with cartilaginous margins; without keels; 5-7 -veined. Upper glume apex acute, or acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile florets female. Fertile lemma lanceolate; 4-5 mm long; (0.8-)1-2 mm wide; coriaceous; without keel. Lemma margins involute. Lemma apex obtuse. Palea coriaceous.
Morphology Reproductive morphology Flowers
Anthers 3.
sex Male
Male inflorescence terminal and axillary; unlike female; a panicle (3,4-8cm). Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 5.5-7.8 mm long; hairy. Male spikelet glumes absent. Male spikelet lemma 3 -veined; awned; with 1.5-3 mm long awn.
Distribution
South America: Brazil.
Reference
Olyreae. Oliveira & L-Wagner 2009.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0