Pappostipa frigida (Phil.) Romasch.

First published in J. Bot. Res. Inst. Texas 2: 185 (2008)
This species is accepted
The native range of this species is Bolivia to NW. Argentina and Central Chile. It is a perennial and grows primarily in the subalpine or subarctic biome.

Descriptions

Morphology General Habit
Perennial; caespitose; clumped densely. Culms erect; 15-30 cm long; 2 -noded. Ligule an eciliate membrane; 3-5 mm long; pubescent on abaxial surface. Leaf-blades filiform; convolute; 5-20 cm long; 0.5 mm wide. Leaf-blade surface ribbed; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; shorter than basal leaves. Panicle open; linear; 2-6 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 16-24 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; acute.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 16-24 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; acute.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 16-24 mm long; membranous; without keels; 3 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 5-8 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy all along. Lemma margins convolute; covering most of palea. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn geniculate; 12-20 mm long overall; with twisted column. Column of lemma awn 7-10 mm long; plumose; with 5-6 mm long hairs. Palea 4-7 mm long; 1 length of lemma; 2 -veined; without keels. Palea surface pubescent.
Morphology Reproductive morphology Flowers
Lodicules 3; 2-3 mm long. Anthers 3. Stigmas 2. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; fusiform; 4 mm long. Hilum linear.
Distribution
South America: western South America and southern South America.
Reference
Stipeae. Matthei 1995.
[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