Pappostipa nicorae (F.A.Roig) Romasch.

First published in J. Bot. Res. Inst. Texas 2: 183 (2008)
This species is accepted
The native range of this species is NW. Argentina. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms 10-19 cm long; 2 -noded. Culm-nodes swollen; glabrous. Leaf-sheaths longer than adjacent culm internode; smooth; glabrous on surface. Leaf-sheath oral hairs pubescent. Ligule an eciliate membrane. Leaf-blades convolute; 0.4-0.5 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate; pungent.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; comprising 9-12 fertile spikelets; subtended by an inflated leaf-sheath; embraced at base by subtending leaf. Panicle open; linear; 3-7 cm long; bearing few spikelets. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2-8 mm long; pubescent.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 19-26 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.2-1.8 mm long; glabrous; acute.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 19-26 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.2-1.8 mm long; glabrous; acute.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear; 19-26 mm long; 1 length of upper glume; membranous; much thinner on margins; yellow; 1-keeled; 3 -veined. Lower glume primary vein ciliolate. Lower glume surface pubescent. Lower glume apex acuminate. Upper glume linear; 19-26 mm long; membranous; with hyaline margins; yellow; 1-keeled; 3 -veined. Upper glume primary vein ciliolate. Upper glume surface pubescent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 7-8 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy below; with conspicuous apical hairs. Lemma margins convolute; covering most of palea. Lemma hairs 3 mm long. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 20-50 mm long overall; with 19-20 mm long limb; with twisted column. Column of lemma awn 10-13 mm long; plumose. Palea 6-7 mm long; 0 -veined; without keels. Palea surface hirsute.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 4-4.5 mm long.
Distribution
South America: southern South America.
Reference
Stipeae. Roig 1997.
[GB]

Sources

  • 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 2022 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 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0