Poaceae
Agrostis

Agrostis griffithiana (Hook.f.) Bor

First published in Grass. Burma, Ceylon, India & Pakistan: 387 (1960)
This species is accepted
The native range of this species is Assam. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms erect; 50-100 cm long. Ligule an eciliate membrane; 2-3 mm long; scaberulous on abaxial surface; truncate. Leaf-blades 15-25 cm long; 3-4 mm wide; coriaceous. Leaf-blade surface smooth.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate; 6-20 cm long. Primary panicle branches appressed; 2-5 -nate; 5-10 cm long. Panicle branches capillary; smooth, or scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 3-4 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3-4 mm long; 1.3-1.4 length of adjacent fertile lemma; membranous; 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 ovate; 2-3 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface pubescent. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1-0.5 way up back of lemma; geniculate; 5-6 mm long overall; clearly exserted from spikelet; with twisted column. Palea 1 length of lemma; hyaline.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1.25 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: India.
Reference
Aveneae. Fl Assam 1993.
[GB]

Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 30-60 cm long. Culm-nodes glabrous. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane. Leaf-blades 15-25 cm long; 4-8 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; lanceolate; 7-14 cm long; 1-2.5 cm wide. Primary panicle branches whorled at most nodes; 3-6 cm long. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3-3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3-3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 3-3.5 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 ovate; 2.7-3.1 mm long; 1.3 length of adjacent fertile lemma; 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 oblong; 2-2.5 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma margins ciliate. Lemma apex dentate; 4 -fid; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; geniculate; 6 mm long overall; with twisted column. Column of lemma awn 2 mm long. Palea 2 mm long; 0.8-1 length of lemma; hyaline.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
Asia-tropical: India.
Reference
Aveneae. Bor 1994.
[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

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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