- Family: Poaceae Barnhart
- Genus: Pseudopogonatherum A.Camus
Pseudopogonatherum irritans (R.Br.) A.Camus
- Genus: Pseudopogonatherum A.Camus
This species is accepted, and its native range is Indo-China to N. Australia.
Descriptions
According to GrassBase - The Online World Grass Flora under the synonym Eulalia irritans
[GB]- Habit
- Annual. Culms erect; 60-100 cm long; 6-8 -noded. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades filiform; involute; 25-50 cm long; 1 mm wide; glaucous. Leaf-blade surface pubescent; hairy adaxially. Leaf-blade apex attenuate.
- Inflorescences
- Inflorescence composed of racemes. Racemes numerous; digitate; erect, or ascending; 3-5 cm long. Central inflorescence axis 1-3 cm long. Rhachis tough, or fragile at the nodes; 0.4 mm wide; ciliate on margins. Rhachis internodes linear. Rhachis internode tip transverse. Spikelets in pairs. Fertile spikelets sessile and pedicelled, or pedicelled (when tough); 2 in the cluster. Pedicels linear; angular; 1-2.5 mm long; ciliate.
- Spikelets
- Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5-3 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus 1 mm long; bearded; base acute; attached obliquely. Spikelet callus hairs 1-1.5 mm long.
- Fertile
- Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5-3 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus 1 mm long; bearded; base acute; attached obliquely. Spikelet callus hairs 1-1.5 mm long.
- Glume
- Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; chartaceous; 2-keeled; keeled above; 2 -veined. Lower glume surface convex, or flat; pilose. Lower glume hairs white. Lower glume apex dentate; 2 -fid. Upper glume oblong; 1 length of spikelet; 1-keeled; 1-3 -veined. Upper glume lateral veins absent, or obscure. Upper glume surface pilose. Upper glume hairs white. Upper glume awned; 1 -awned. Upper glume awn 5-7 mm long.
- Florets
- Basal sterile florets with vestigial lower floret. Fertile lemma oblong; hyaline; without keel. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate; 30-50 mm long overall; with twisted column. Column of lemma awn ciliate; with 1.5-2 mm long hairs. Palea absent or minute.
- Flowers
- Anthers 3; 1 mm long.
- Distribution
- Asia-tropical: Indo-China, Malesia, and Papuasia. Australasia: Australia.
- Reference
- Andropogoneae. Reeder 1993.
Images
Distribution
Native to:
Myanmar, New Guinea, Northern Territory, Philippines, Queensland, Thailand, Western Australia
Synonyms
Other Data
Pseudopogonatherum irritans (R.Br.) A.Camus appears in other Kew resources:
Herbarium Catalogue (5 records)
Date | Reference | Identified As | Barcode | Type Status |
---|---|---|---|---|
Larsen, K. [8171], Thailand | Eulalia irritans | K000688510 | ||
van Beusekom, C.F. [2290], Thailand | Eulalia irritans | K000688509 | ||
Lazarides, M. [7443], Thailand | Eulalia irritans | K000688508 | ||
Hosseus, C.C. [143], Thailand | Eulalia irritans | K000688507 | ||
Brown, R. [6187], Australia | Eulalia irritans | K000943475 |
Bibliography
First published in Ann. Soc. Linn. Lyon, n.s., 68: 205 (1922)
Not accepted by
- Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Eulalia irritans.]
Literature
Kew Backbone Distributions
- Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
- Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.
Sources
GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0
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 2019. 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 2019. 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