Poaceae
Agrostis

Agrostis serranoi Phil.

First published in Anuario Hidrogr. Mar. Chile 11: 198 (1886)
This species is accepted
The native range of this species is Central & S. Chile to S. Argentina. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short. Basal innovations extravaginal. Culms erect; 20-60 cm long; 2 -noded. Lateral branches lacking. Leaf-sheaths smooth. Ligule an eciliate membrane; 2.5-5 mm long; scaberulous on abaxial surface; erose. Leaf-blades 3-8 cm long; 2-3 mm wide. Leaf-blade surface smooth, or scabrous; rough on both sides. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle smooth. Panicle open; lanceolate; 8-20 cm long; 2-8 cm wide; with spikelets clustered towards branch tips. Primary panicle branches appressed, or ascending; 2-3 -nate; whorled at most nodes; rebranched at middle. Panicle branches flexuous; scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 5-15 mm long; smooth, or scaberulous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.3-3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; hairy in 2 tufts. Floret callus hairs 0.5 mm long.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.3-3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; hairy in 2 tufts. Floret callus hairs 0.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 2.3-3 mm long; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2.3-3 mm long; membranous; purple; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 1.7-2 mm long; hyaline; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex muticous, or awned; 1 -awned. Principal lemma awn dorsal; arising 0.75 way up back of lemma; straight; 1-2 mm long overall. Palea 0.5-0.7 mm long; hyaline.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.5-0.6 mm long; membranous. Anthers 3; 0.4-0.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; sulcate on hilar side; 1-1.2 mm long. Hilum linear.
Distribution
South America: southern South America.
Reference
Aveneae. Agrasar 1995.
[GB]

Sources

  • 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 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