Poaceae
Eragrostis

Eragrostis pilosissima Link

First published in Hort. Berol. 1: 189 (1827)
This species is accepted
The native range of this species is SE. China to Vietnam, Nansei-shoto to Taiwan. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial. Culms 35-40 cm long. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths hirsute. Ligule a fringe of hairs. Leaf-blades filiform; involute; 6-12 cm long; 1-1.5 mm wide. Leaf-blade surface hirsute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 13-14 cm long. Primary panicle branches spreading. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 5-7 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 10-12 fertile florets; with diminished florets at the apex. Spikelets linear, or oblong; laterally compressed; 5-7 mm long; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes eventually visible between lemmas.
Fertile
Spikelets comprising 10-12 fertile florets; with diminished florets at the apex. Spikelets linear, or oblong; laterally compressed; 5-7 mm long; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes eventually visible between lemmas.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet. Lower glume ovate; 1 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.2 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 1.5-1.7 mm long; membranous; keeled; 3 -veined. Lemma lateral veins prominent. Lemma apex acute. Palea keels smooth. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; cuneate; fleshy.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 0.5 mm long.
Distribution
Asia-temperate: China and eastern Asia. Asia-tropical: Indo-China.
Reference
Eragrostideae. Lecomte 1994.
[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: confident
[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