Genus:
Avena L.

Avena clauda Durieu

This species is accepted, and its native range is NW. Africa, E. Balkan Peninsula to W. & Central Asia.

[GB]
Morphology General Habit
Annual; culms solitary, or caespitose. Culms erect, or geniculately ascending; 13-60 cm long. Culm-internodes glaucous. Lateral branches lacking. Leaf-sheaths glabrous on surface, or pilose. Ligule an eciliate membrane; 1.8-3 mm long; obtuse. Leaf-blades 3-10 cm long; 2-4 mm wide. Leaf-blade surface glabrous, or pilose.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; nodding; 6-15 cm long; 4-6 cm wide. Spikelets pendulous; solitary. Fertile spikelets pedicelled. Pedicels filiform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3-5 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 18-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; bearded; obtuse; disarticulating obliquely. Floret callus hairs 4-4.5 mm long.
Fertile
Spikelets comprising 3-5 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 18-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; bearded; obtuse; disarticulating obliquely. Floret callus hairs 4-4.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 11-15 mm long; 0.5-0.66 length of upper glume; membranous; without keels; 3-5 -veined. Lower glume apex acuminate. Upper glume elliptic; 20-25 mm long; 1-1.3 length of adjacent fertile lemma; membranous; without keels; 7 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 20 mm long; coriaceous; much thinner above; without keel; 7 -veined. Lemma surface glabrous, or pilose; hairy above. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn dorsal; arising 0.33-0.5 way up back of lemma; geniculate; 30 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 7 mm long; shorter than principal. Palea keels ciliolate.
Morphology Reproductive morphology Flowers
Anthers 3. Ovary pubescent all over.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; sulcate on hilar side; hairy all over. Hilum linear.
Distribution
Europe: southeastern. Africa: north. Asia-temperate: Soviet Middle Asia, Caucasus, and western Asia.
Reference
Aveneae. Fl Turk 1993.

Native to:

Algeria, Bulgaria, Cyprus, Greece, Iran, Iraq, Kazakhstan, Kirgizstan, Krym, Lebanon-Syria, Morocco, North Caucasus, Palestine, Tadzhikistan, Transcaucasus, Turkey, Turkey-in-Europe, Turkmenistan

Avena clauda Durieu appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Jan 1, 1970 Balansa, B. [554], Algeria K000345120 isotype Yes
Jan 1, 1970 Durieu [s.n.], Algeria K000345121 isosyntype Yes
Jan 1, 1970 Durieu [s.n.], Algeria K000345122 Yes
Jan 1, 1970 Kotschy, K.T.G. [s.n.], Syria K000808545 isosyntype Yes
Jan 1, 1970 Durieu [s.n.], Algeria K000345123 Yes
Jan 1, 1970 Aucher Eloy, P.M.R. [2929], Syria K000808544 isosyntype Yes

First published in Rev. Bot. Recueil Mens. 1: 360 (1845)

Accepted by

  • Bor, N.L. (1968). Flora of Iraq 9: 1-588. Ministry of Agriculture & Agrarian Reform, Baghdad.
  • Bor, N.L. (1970). Flora Iranica 70: 1-573. Naturhistorisches Museums Wien.
  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Danin, A. (2004). Distribution Atlas of Plants in the Flora Palaestina area: 1-517. The Israel Academy of Sciences and Humanities, Jerusalem.
  • Davis, P.H. (ed.) (1985). Flora of Turkey and the East Aegean Islands 9: 1-724. Edinburgh University Press, Edinburgh.
  • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • Takhtajan, A.L. (ed.) (2006). Konspekt Flora Kavkaza 2: 1-466. Editio Universitatis Petropolitanae.
  • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

Literature

Kew Backbone Distributions

  • Davis, P.H. (ed.) (1985). Flora of Turkey and the East Aegean Islands 9: 1-724. Edinburgh University Press, Edinburgh.
  • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • Fedtschenko, B.A. & al. (1932). Flora Turkmenii 1: 1-340. Turkmenskoe gosudarstvennoe izd., Ashkhabad.
  • Ovczinnikov, P.N. (ed.) (1957). Flora Tadzhikskoi SSR 1: 1-547. Izd-vo Akademii nauk SSSR, Moskva.
  • Pavlov, N.V. (ed.) (1956). Flora Kazakhstana 1: 1-354. Alma-Ata, Izd-vo Akademii nauk Kazakhskoi SSR.
  • Roshevitz, R.J. & al. (eds.) (1950). Flora Kirgizskoi SSR 2: 1-315. Frunze : Izd-vo KirgizFAN SSSR.
  • Takhtajan, A.L. (ed.) (2006). Konspekt Flora Kavkaza 2: 1-466. Editio Universitatis Petropolitanae.
  • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

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