Poaceae
Aegilops

Aegilops longissima Schweinf. & Muschl.

First published in R.C.Muschler, Man. Fl. Egypt 1: 156 (1912)
This species is accepted
The native range of this species is Syria to Egypt. It is an annual and grows primarily in the subtropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/13164456/96170847

Conservation
LC - least concern
[IUCN]

Morphology General Habit
Annual; caespitose. Culms geniculately ascending; 40-110 cm long. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades flat, or involute; 5-10 cm long; 3 mm wide. Leaf-blade surface glabrous, or pilose.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes; not deciduous as a whole, or deciduous as a whole. Racemes 1; single; linear; unilateral, or bilateral; 10-20 cm long; bearing 10-20 fertile spikelets on each. Rhachis tough, or fragile at the nodes. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 1 length of fertile spikelet; when fragile falling with spikelet above. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Basal sterile spikelets absent, or rudimentary; 0-1 in number. Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 12-14 mm long; falling entire; deciduous with accessory branch structures.
Sterile
Basal sterile spikelets absent, or rudimentary; 0-1 in number.
Fertile
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 12-14 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; shorter than spikelet. Lower glume oblong; 7-8 mm long; 1 length of upper glume; coriaceous; without keels; 6-7 -veined. Lower glume lateral veins distinct; ribbed. Lower glume apex dentate, or lobed; 2 -fid; muticous, or awned, or awned only on distal spikelets; 1 -awned. Lower glume awn 3-10 mm long. Upper glume oblong; 7-8 mm long; 0.8-0.9 length of adjacent fertile lemma; coriaceous; without keels; 6-7 -veined. Upper glume lateral veins distinct; ribbed; parallel at apex. Upper glume apex dentate, or lobed; 2 -fid; muticous, or awned, or awned only on distal spikelets; 1 -awned. Upper glume awn 3-10 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 8-10 mm long; coriaceous; keeled; keeled above; 5 -veined. Lemma apex dentate; 1-2 -fid; awned only on distal spikelets; 1 -awned. Principal lemma awn subterete below; 40-60 mm long overall. Palea 2 -veined. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex. Disseminule comprising a rhachis internode, or inflorescence.
Distribution
Africa: north. Asia-temperate: western Asia.
Reference
Triticeae. Eig 1993.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • 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

  • Kew Science Photographs

    • Copyright applied to individual images