Pappostipa patagonica (Speg.) Romasch.

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

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths red, or purple. Basal innovations intravaginal. Culms geniculately ascending; 22-40 cm long; 0.6-1.4 mm diam.; 2 -noded. Culm-internodes distally glabrous, or pubescent. Culm-nodes constricted; glabrous. Leaf-sheaths glabrous on surface, or pilose; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane; 0.5-2 mm long; 0.2-0.3 mm long on basal shoots; pubescent on abaxial surface; truncate. Collar pubescent. Leaf-blades erect; straight, or curved; deciduous at the ligule; filiform; conduplicate; 5-20 cm long; 0.8-1 mm wide; stiff. Leaf-blade surface pubescent; hairy adaxially, or on both sides. Leaf-blade margins ciliate. Leaf-blade apex attenuate; pungent.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; subtended by an inflated leaf-sheath; embraced at base by subtending leaf. Panicle contracted; oblong; 5-10 cm long; bearing few spikelets. Primary panicle branches appressed. Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 20-33 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 2.5-3 mm long; pubescent; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 20-33 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 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 lanceolate; 20-33 mm long; 1 length of upper glume; membranous; without keels; 3-5 -veined. Lower glume apex attenuate. Upper glume lanceolate; 20-33 mm long; membranous; without keels; 3-5 -veined. Upper glume apex attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma linear; subterete; 10-13.5 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 35-55 mm long overall; with 25-45 mm long limb; with twisted column. Column of lemma awn 8-10 mm long; plumose; with 7-10 mm long hairs. Palea linear; 1 length of lemma; 2 -veined; without keels. Palea surface pubescent; hairy on back; hairy in the middle.
Morphology Reproductive morphology Flowers
Lodicules 3; 1.5-3 mm long. Anthers 3; 5-5.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; fusiform; 8-8.5 mm long; dark brown. Embryo 0.33 length of caryopsis. Hilum linear; 1 length of caryopsis.
Distribution
South America: southern South America.
Reference
Stipeae. Torres 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