Pappostipa chrysophylla (É.Desv.) Romasch.

First published in J. Bot. Res. Inst. Texas 2: 185 (2008)
This species is accepted
The native range of this species is Peru, Chile to Argentina. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Stolons present. Butt sheaths yellow; glabrous, or pubescent. Culms erect, or geniculately ascending; 15-40 cm long; 2-4 -noded. Culm-internodes distally glabrous, or pubescent. Culm-nodes glabrous. Ligule an eciliate membrane; 5 mm long. Leaf-blades filiform; conduplicate; 10-30 cm long; 0.5 mm wide. Leaf-blade surface scaberulous; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; comprising 10-20 fertile spikelets. Panicle open; linear; dense; 6-9 cm long; 0.5-1 cm wide. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 5-10 mm long; scabrous; ciliate; hairy at tip.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 14-29 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; curved; 1.5-2 mm long; pubescent; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 14-29 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; curved; 1.5-2 mm long; pubescent; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 14-29 mm long; 1.05 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 13-28 mm long; membranous; without keels; 3 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 6-11 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy all along, or below. Lemma margins convolute; covering most of palea. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 25-60 mm long overall; with twisted column. Column of lemma awn 10-22 mm long; plumose; hairy generally; with 5-10 mm long hairs. Palea 5-6 mm long; 2 -veined; without keels. Palea surface pubescent.
Morphology Reproductive morphology Flowers
Lodicules 3. Anthers 3; yellow; anther tip smooth. Stigmas 2. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; fusiform; 6-7 mm long. Hilum linear.
Distribution
South America: western South America and southern South America.
Reference
Stipeae. Fl Pat 1995.
[GB]

Sources

  • 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 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