Pappostipa marqueziana (F.A.Roig) Ciald.

First published in Darwiniana 48: 172 (2010)
This species is accepted
The native range of this species is Argentina (San Juan). It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths red. Culms 40-50 cm long; 2 -noded. Culm-internodes distally glabrous. Leaf-sheaths pilose. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane. Collar glabrous. Leaf-blades flexuous; filiform; conduplicate; 0.4-1 mm wide. Leaf-blade surface scabrous; rough abaxially. Leaf-blade apex attenuate; muticous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; flexuous; 18-24 cm long; 0.5-1 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 18-19 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 1.5-1.7 mm long; pilose; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 18-19 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 1.5-1.7 mm long; pilose; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 18-19 mm long; 1 length of upper glume; hyaline; without keels. Lower glume apex acute. Upper glume lanceolate; 17-18 mm long; 2-2.5 length of adjacent fertile lemma; hyaline; without keels. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; laterally compressed; 8-10 mm long; coriaceous; keeled. Lemma surface glabrous. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; with this appendage 1.5-2 mm long; awned; 1 -awned. Principal lemma awn geniculate; 25-33 mm long overall; with 16-22 mm long limb; with twisted column. Column of lemma awn 9-11 mm long; hirsute. Palea 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