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This species is accepted, and its native range is French Guiana.

[GB]
Habit
Annual; mat forming. Culms prostrate; 1-2 cm long. Culm-internodes purple; distally glabrous. Culm-nodes pubescent. Lateral branches ample. Leaves 3-5 per branch. Leaf-sheaths inflated; 0.18-0.32 cm long; striately veined; pubescent; with reflexed hairs. Ligule a fringe of hairs; 0.2-0.3 mm long. Leaf-blade base truncate; asymmetrical; with a brief petiole-like connection to sheath; petiole pubescent. Leaf-blades ovate; 0.27-0.33 cm long; 1.8-2.1 mm wide; membranous; mid-green and purple; discolorous with last colour beneath. Leaf-blade venation with 12-14 secondary veins. Leaf-blade surface puberulous; hairy adaxially. Leaf-blade margins scaberulous. Leaf-blade apex acute.
Inflorescences
Monoecious; with male and female spikelets in different inflorescences. Inflorescence comprising only a few spikelets; comprising 2-5 fertile spikelets; axillary; embraced at base by subtending leaf. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels filiform; 0.3-1 mm long; glabrous; tip cupuliform. Male inflorescence terminal; unlike female; of few spikelets (1-2 spikelets). Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 1.1-1.2 mm long; glabrous. Male spikelet glumes absent. Male spikelet lemma 1.1-1.2 mm long; 3 -veined; muticous.
Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1-1.4 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus square; incorporating lowest rhachilla internode with adnate lower glume; 0.2 mm long. Rhachilla internodes elongated between glumes.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1-1.4 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus square; incorporating lowest rhachilla internode with adnate lower glume; 0.2 mm long. Rhachilla internodes elongated between glumes.
Glume
Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume linear, or ovate; 1-1.4 mm long; 1 length of upper glume; membranous; firmer on margins; without keels; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume surface pilose. Lower glume apex acute. Upper glume lanceolate, or ovate; 1-1.4 mm long; 1 length of adjacent fertile lemma; membranous; with cartilaginous margins; without keels; 1 -veined, or 3 -veined. Upper glume lateral veins absent, or obscure. Upper glume surface pilose. Upper glume apex acute.
Florets
Fertile florets female. Fertile lemma lanceolate, or elliptic, or ovate; 0.9 mm long; cartilaginous; pallid; shiny; without keel; 3 -veined. Lemma surface smooth. Lemma margins involute; covering most of palea. Lemma apex acute. Palea 1 length of lemma; cartilaginous; 2-keeled.
Flowers
Anthers 3; 0.4-0.5 mm long; brown. Stigmas 2.
Fruits
Caryopsis with adherent pericarp; ellipsoid, or oblong; 0.65-0.95 mm long; dark brown. Hilum linear; 0.25 length of caryopsis.
Male
Male inflorescence terminal; unlike female; of few spikelets (1-2 spikelets). Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 1.1-1.2 mm long; glabrous. Male spikelet glumes absent. Male spikelet lemma 1.1-1.2 mm long; 3 -veined; muticous.
Distribution
South America: northern South America.
Reference
Olyreae. Judz. 2007.

Native to:

French Guiana

Raddiella vanessiae Judz. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Dec 1, 2013 Hequet, V. [1281], French Guiana K000913314 isotype

First published in J. Bot. Res. Inst. Texas 1: 1 (2007)

Accepted by

  • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

GrassBase - The Online World Grass Flora
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Herbarium Catalogue Specimens
'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0