Poaceae
Pappostipa

Pappostipa jucunda (F.A.Roig) Ciald.

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

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths pallid; glossy. Culms 16-19 cm long; 2 -noded. Culm-internodes distally glabrous. Leaf-sheaths 3-5 cm long. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane. Collar pubescent. Leaf-blades flexuous; filiform; convolute; 8-10 cm long; 0.5-0.8 mm wide. Leaf-blade surface glabrous. Leaf-blade apex attenuate; muticous, or pungent.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; comprising 5-8 fertile spikelets; embraced at base by subtending leaf. Panicle contracted; linear; 3-4 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; 24-27 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.5-1.6 mm long; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 24-27 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.5-1.6 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; 24-27 mm long; 1 length of upper glume; membranous. Lower glume apex attenuate. Upper glume linear, or lanceolate; 24-27 mm long; membranous. Upper glume apex attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 10-15 mm long; coriaceous; without keel. Lemma surface villous; with conspicuous apical hairs. Lemma margins convolute; covering most of palea. Lemma hairs 8-10 mm long. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 30-36 mm long overall; with 23-30 mm long limb; with twisted column. Column of lemma awn 5.8-6.4 mm long; hirsute. Palea 5.8-6.4 mm long.
Distribution
South America: southern South America.
Reference
Stipeae. Fl San Juan 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