Poaceae
Stipagrostis

Stipagrostis acutiflora (Trin. & Rupr.) De Winter

First published in Kirkia 3: 133 (1963)
This species is accepted
The native range of this species is Sahara to Arabian Peninsula. It is a perennial and grows primarily in the desert or dry shrubland 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]

Morphology General Habit
Perennial; caespitose. Stolons absent, or present. Culms geniculately ascending; 20-40 cm long. Culm-internodes distally pubescent. Culm-nodes glabrous. Leaf-sheath oral hairs bearded. Ligule a fringe of hairs. Leaf-blades filiform; convolute; 4-7 cm long; 1 mm wide; stiff. Leaf-blade surface scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; exserted, or embraced at base by subtending leaf. Panicle open; lanceolate; 5-15 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.3 mm long; pubescent; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.3 mm long; pubescent; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 8 mm long; 0.9 length of upper glume; membranous; without keels; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 9 mm long; 1.8 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex dentate; acute; mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 5 mm long; coriaceous; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex acute; awned; 3 -awned. Principal lemma awn 3-branched; with 10-15 mm long limb; with a straight or slightly twisted column; deciduous; abscissing from top of lemma; limb plumose; glabrescent towards tip and base of limb. Column of lemma awn 1 mm long; glabrous; without distinct apical hairs. Lateral lemma awns 5-7 mm long; shorter than principal; glabrous. Palea 0.3 length of lemma; without keels.
Morphology Reproductive morphology Flowers
Anthers 0.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; fusiform; 3 mm long. Embryo 0.33 length of caryopsis. Hilum linear; 1 length of caryopsis.
Distribution
Africa: north, west tropical, and northeast tropical. Asia-temperate: western Asia and Arabia.
Reference
Aristideae. Fl Afr N.
[GB]

Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Slender caespitose or stoloniferous perennial
Morphology Leaves
Narrowly convolute curved leaf-blades
Morphology General Height
Up to about 45 cm. high.
[FWTA]

Sources

  • Angiosperm Extinction Risk Predictions v1

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

  • Flora of West Tropical Africa

    • Flora of West Tropical 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

    • Digital Image © Board of Trustees, RBG Kew 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

  • World Checklist of Vascular plants (WCVP)

    • 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