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

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

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

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0