Poaceae
Campeiostachys

Campeiostachys tsukushiensis (Honda) B.R.Baum, J.L.Yang & C.Yen

First published in J. Syst. Evol. 49: 157 (2011)
This species is accepted
The native range of this species is S. Russian Far East to China and Temp. E. Asia. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 30-100 cm long; 2-3.5 mm diam.; 4-6 -noded. Leaves basal and cauline. Leaf-sheaths glabrous on surface, or pubescent; outer margin hairy. Ligule an eciliate membrane; 0.5-0.7 mm long; truncate. Leaf-blades 15-40 cm long; 3-10 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; ascending; bilateral; 10-25 cm long; 8-12 mm wide. Rhachis flattened; scabrous on margins; glabrous on margins, or ciliate on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear; 10-20 mm long. Rhachis internode tip flat. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 15-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-2.5 mm long; pubescent.
Fertile
Spikelets comprising 5-10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 15-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-2.5 mm long; pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4-6 mm long; 0.75-0.8 length of upper glume; coriaceous; without keels; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute; muticous, or awned; 1 -awned. Lower glume awn 2-5 mm long. Upper glume lanceolate; 5-8 mm long; coriaceous; without keels; 5 -veined. Upper glume primary vein scabrous. Upper glume apex acute; muticous, or awned; 1 -awned. Upper glume awn 2-5 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 6-10 mm long; coriaceous; much thinner on margins; 5 -veined. Lemma lateral veins ribbed. Lemma surface glabrous, or pilose. Lemma apex acute; awned; 1 -awned. Principal lemma awn straight, or flexuous; 20-40 mm long overall. Palea lanceolate. Palea keels approximate (above); winged; narrowly winged; ciliolate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-temperate: China and eastern Asia.
Reference
Triticeae. Koyama 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