Poaceae
Bromus

Bromus morrisonensis Honda

First published in Bot. Mag. (Tokyo) 42: 137 (1928)
This species is accepted
The native range of this species is Taiwan to Philippines. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; short-lived; caespitose. Basal innovations extravaginal. Culms erect, or geniculately ascending; 50-70 cm long. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades 21-23 cm long; 3-3.5 mm wide; flaccid. Leaf-blade surface scabrous; rough adaxially; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle glabrous. Panicle open; nodding; 13-16 cm long; 2.5-3 cm wide. Primary panicle branches 3 -nate; 7 cm long; bearing 3 fertile spikelets on each lower branch. Panicle axis scabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 18-23 mm long; 5-8 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-2.5 mm long; pubescent. Floret callus pilose; hairy in a ring above; disarticulating obliquely; with circular scar.
Fertile
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 18-23 mm long; 5-8 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-2.5 mm long; pubescent. Floret callus pilose; hairy in a ring above; disarticulating obliquely; with circular scar.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume linear, or lanceolate; 4.5-5.5 mm long; 0.75-0.85 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume elliptic; 5.75-6.5 mm long; 0.66 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein smooth. Upper glume apex acuminate; mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 9-10 mm long; chartaceous; without keel; 3(-5) -veined. Lemma surface puberulous; hairy below. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 4.5-5 mm long overall. Palea 6.5 mm long; 0.66-0.8 length of lemma. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1.5-2 mm long; yellow, or orange. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear.
Distribution
Asia-temperate: eastern Asia. Asia-tropical: Malesia.
Reference
Bromeae. Veldkamp 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: 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 2026. 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 2026. 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