Poaceae
Agrostis

Agrostis zenkeri Trin.

First published in Mém. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 6, Sci. Math., Seconde Pt. Sci. Nat. 6(2, Bot.): 363 (1841)
This species is accepted
The native range of this species is SW. India (Nilgiri Hills). It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Annual; caespitose. Culms erect, or geniculately ascending; 30-60 cm long. Culm-internodes smooth, or scaberulous; distally glabrous. Lateral branches sparse, or ample. Leaf-sheaths tight; striately veined; scaberulous; glabrous on surface. Ligule an eciliate membrane; 1-2 mm long; scaberulous on abaxial surface. Leaf-blades 5-11 cm long; 3-5 mm wide. Leaf-blade surface scaberulous, or scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic, or ovate; 15-32 cm long; 10 cm wide. Primary panicle branches spreading; 3-4 -nate. Panicle axis smooth; glabrous. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.5 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.5 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; with lower wider than upper; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 2.5 mm long; 1.1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 2 mm long; 0.9 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic, or ovate; 2.5 mm long; 2 mm wide; chartaceous; without keel; 3 -veined. Lemma lateral veins prominent. Lemma surface scaberulous. Lemma apex muticous, or awned; 1 -awned. Principal lemma awn subapical; 0.5 mm long overall; not or scarcely exserted from spikelet. Palea 0.75 length of lemma; hyaline; 2 -veined. Rhachilla extension pilose.
Morphology Reproductive morphology Flowers
Anthers 3; 0.5-0.8 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: India.
Reference
Aveneae. Bor 2006.
[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