Poaceae
Pappostipa

Pappostipa choconensis (F.A.Roig) Ciald.

First published in Darwiniana 48: 171 (2010)
This species is accepted
The native range of this species is Argentina (Neuquén). It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths red. Culms erect; 30-40 cm long. Culm-internodes distally pilose. Leaf-sheaths 7-10 cm long; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane. Collar glabrous. Leaf-blades curved, or flexuous; filiform; conduplicate; 35-38 cm long; stiff.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; comprising 10-12 fertile spikelets; aerial, or shorter than basal leaves. Panicle contracted; oblong; 8-10 cm long; bearing few spikelets. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 37-38 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 3 mm long; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 37-38 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 3 mm long; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear, or lanceolate; 37-38 mm long; 1 length of upper glume; hyaline; without keels. Lower glume surface pilose; hairy at base. Lower glume margins ciliolate. Lower glume apex attenuate. Upper glume linear, or lanceolate; 37-38 mm long; 3 length of adjacent fertile lemma; hyaline; without keels. Upper glume surface pilose; hairy at base. Upper glume margins ciliolate. Upper glume apex attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 12-13 mm long; coriaceous; without keel. Lemma surface pilose; hairy all along (longer above). Lemma margins convolute; covering most of palea. Lemma hairs 1-2 mm long. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 73-80 mm long overall; with 55-60 mm long limb; with twisted column; deciduous. Column of lemma awn 18-20 mm long; ciliate. Palea 46 mm long; 0.5 length of lemma; without keels. Palea surface pilose; hairy on back.
Distribution
South America: southern South America.
Reference
Stipeae. Roig 2011.
[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