Poaceae
Zenkeria

Zenkeria stapfii Henrard

First published in Repert. Spec. Nov. Regni Veg. 17: 396 (1921)
This species is accepted
The native range of this species is India, Sri Lanka. It is a perennial and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms 10-30 cm long. Ligule a fringe of hairs. Leaf-blades involute; 15-30 cm long; 12 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially; with tubercle-based hairs. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; nodding; 15 cm long; 3-4 cm wide. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 3.5-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose; obtuse.
Fertile
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 3.5-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose; obtuse.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture; gaping. Lower glume oblong; 2.5 mm long; 0.8 length of upper glume; membranous; 1-keeled; 3-5 -veined. Lower glume apex acute. Upper glume oblong; 3 mm long; 0.75-0.8 length of adjacent fertile lemma; membranous; 1-keeled; 3-5 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 3.75-4 mm long; membranous; keeled; keeled above; 7-9 -veined. Lemma midvein scabrous. Lemma lateral veins ribbed. Lemma surface pilose; with tubercle-based hairs. Lemma apex acuminate. Palea surface pilose. Rhachilla extension 0.1 length of fertile floret.
Morphology Reproductive morphology Flowers
Lodicules 2; cuneate; fleshy. Anthers 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; linear; isodiametric; biconvex. Embryo 0.5 length of caryopsis. Hilum punctiform.
Distribution
Asia-tropical: India.
Reference
Arundineae. Bor.
[GB]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: low confidence
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0