Poaceae

Alloteropsis J.Presl

First published in C.B.Presl, Reliq. Haenk. 1: 343 (1830)
This genus is accepted
The native range of this genus is Tropical & Subtropical Old World.

Descriptions

nonem

Morphology General Habit
Annual (2), or perennial (3). Rhizomes absent (4), or short (1). Culms erect (3), or geniculately ascending (4), or decumbent (2); slender (1/1); 20-79-150 cm long; firm (4), or wiry (1). Lateral branches lacking (1/1). Leaf-sheaths open for most of their length (2/2). Ligule a ciliate membrane (1), or a fringe of hairs. Leaf-blades linear (3), or lanceolate (2), or ovate (1). Leaf-blade midrib evident (2/2).
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes digitate, or borne along a central axis (1); unilateral. Rhachis angular. Spikelet packing contiguous (4), or lax (1). Raceme-bases brief (4), or filiform (3). Spikelets ascending (1/1); solitary (1), or in pairs, or clustered at each node. Fertile spikelets pedicelled; 2-4 in the cluster, or 5-6 in the cluster (1). Pedicels tip cupuliform (1/1).
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets elliptic (2), or ovate (4); dorsally compressed; 2.5-4.25-7.5 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets elliptic (2), or ovate (4); dorsally compressed; 2.5-4.25-7.5 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reaching apex of florets; thinner than fertile lemma. Lower glume ovate; membranous; without keels; 1 -veined (1), or 3 -veined (4). Lower glume lateral veins absent (1), or distinct (4). Lower glume apex acute (1), or acuminate (4). Upper glume ovate; membranous (3), or cartilaginous (2); without keels; 5 -veined. Upper glume surface glabrous (4), or puberulous (1). Upper glume apex acute (3), or acuminate (3).
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret ovate; membranous (3), or chartaceous (1), or cartilaginous (1); 5 -veined; truncate (1), or acute (1), or acuminate (3). Fertile lemma lanceolate (2), or oblong (3), or ovate (1); chartaceous; without keel; 5 -veined. Lemma margins involute; eciliate (4), or ciliolate (1). Lemma apex acuminate; awned; 1 -awned. Palea 1 length of lemma; chartaceous. Palea surface glabrous (3), or pubescent (2). Palea apex entire (1/1).
Morphology Reproductive morphology Flowers
Lodicules 2 (1/1). Anthers 2 (1/2), or 3 (2/2). Ovary glabrous (2/2).
Morphology Reproductive morphology Fruits
Caryopsis ovoid (2/2); laterally compressed (1/1).
Distribution
Africa, or Temperate Asia (2), or Tropical Asia (2), or Australasia (2), or Pacific (1), or North America (1).
[GB]

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Annual or perennial; leaves inrolled to lanceolate; ligule membranous or a line of hairs
Morphology Reproductive morphology Inflorescences
Inflorescence composed of irregular racemes, these digitate or in whorls on a short central axis
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets ovate to elliptic, dorsally compressed; glumes unequal, acute to shortly awned, the lower shorter than the spikelet, the upper as long as the spikelet and ciliate on the margins; lower floret male, its lemma resembling the upper glume but eciliate, the palea short and deeply bifid; upper lemma crisply chartaceous, acuminate to a short awn, the margins inrolled and covering only the edges of the acute palea.
Distribution
Five species in the Old World tropics.
[FSOM]

Gramineae, W. D. Clayton, S. M. Phillips And S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Annuals or perennials
Morphology Leaves
Leaf-blades convolute to lanceolate; ligule membranous or a line of hairs
Morphology Reproductive morphology Inflorescences
Inflorescence composed of untidy racemes, these digitate or in whorls on a short central axis; rhachis triquetrous, bearing paired or fascicled spikelets
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets ovate to elliptic, dorsally compressed; glumes unequal, the lower shorter than the spikelet, acute to acuminate, the upper equalling the spikelet and ciliate on the margins; lower floret ♂, its lemma resembling the upper glume but eciliate, the palea short and deeply bifid; upper lemma chartaceous, acuminate to a short awn, its narrow inrolled margins covering only the edges of the acute palea
Morphology Reproductive morphology Fruits
Caryopsis elliptic-oblong.
[FTEA]

Gramineae, W. D. Clayton. Flora Zambesiaca 10:3. 1989

Morphology Reproductive morphology Inflorescences
Inflorescence of irregular racemes, these digitate or in whorls on a short common axis, each with a slender weakly unilateral rhachis which is sometimes bare at the base, bearing the spikelets in pairs or clusters.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets narrowly ovate to elliptic.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes acute to briefly awned, the superior as long as spikelet and ciliate on margins, the inferior c. 1/2 as long.
Morphology Reproductive morphology Inflorescences Bracts Lemma
Superior lemma crisply chartaceous with involute margins, shortly awned.
[FZ]

Sources

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Flora of Somalia

    • Flora of Somalia
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • 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

  • 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.

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0