Poaceae
Stipa

Stipa lagascae Roem. & Schult.

First published in Syst. Veg., ed. 15[bis]. 2: 333 (1817)
This species is accepted
The native range of this species is W. & S. Medit. It is a perennial and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rootstock evident. Culms 30-60 cm long. Ligule an eciliate membrane. Leaf-blades filiform; conduplicate; 15-30 cm long; 1-2 mm wide; stiff. Leaf-blade surface smooth, or scaberulous; rough abaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; embraced at base by subtending leaf. Panicle contracted; linear; nodding; 15-30 cm long; bearing few spikelets. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 25-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 2.5-3 mm long; pubescent; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 25-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 2.5-3 mm long; pubescent; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear, or lanceolate; 1 length of upper glume; membranous; without keels. Lower glume apex attenuate. Upper glume linear, or lanceolate; 25-40 mm long; membranous; without keels. Upper glume apex attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; subterete; 14-16 mm long; coriaceous; without keel. Lemma surface pubescent; hairy below; hairy in lines. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; awned; 1 -awned. Principal lemma awn bigeniculate; 160-300 mm long overall; with twisted column; limb glabrous, or puberulous. Column of lemma awn 50-60 mm long; plumose; with 1-2 mm long hairs. Palea 2 -veined; without keels.
Morphology Reproductive morphology Flowers
Anthers 3; anther tip penicillate. Stigmas 2. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
Europe: southwestern. Africa: north. Asia-temperate: western Asia.
Reference
Stipeae. Fl Iran 1993.
[GB]

Sources

  • 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

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. 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 2023. 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