Poaceae
Campeiostachys

Campeiostachys humidora (Ohwi & Sakam.) B.R.Baum, J.L.Yang & C.Yen

First published in J. Syst. Evol. 49: 153 (2011)
This species is accepted
The native range of this species is Korea, Central & S. Japan. It is a perennial or rhizomatous geophyte and grows primarily in the temperate biome.

Descriptions

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]

Morphology General Habit
Perennial; caespitose; clumped loosely. Rhizomes short. Culms geniculately ascending; 40-90 cm long; 2-3 mm diam.; 4-7 -noded. Leaves basal and cauline. Leaf-sheaths outer margin glabrous. Ligule an eciliate membrane; 0.5-0.7 mm long; truncate. Leaf-blades 10-25 cm long; 3-8 mm wide; stiff. Leaf-blade surface scabrous; rough adaxially, or on both sides.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; bilateral; 8-20 cm long; 7-10 mm wide. Rhachis flattened. Spikelet packing broadside to rhachis. Rhachis internodes linear; 7-15 mm long. Rhachis internode tip flat. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 13-22 mm long; 5-6 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1-2 mm long; pubescent. Floret callus pubescent.
Fertile
Spikelets comprising 4-10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 13-22 mm long; 5-6 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1-2 mm long; pubescent. Floret callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5.5-7 mm long; 0.75-0.8 length of upper glume; coriaceous; without keels; 3-5 -veined. Lower glume apex acute. Upper glume lanceolate; 7-8.5 mm long; coriaceous; without keels; 5-7 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 8-11 mm long; coriaceous; much thinner on margins; 5 -veined. Lemma lateral veins ribbed. Lemma margins pubescent; hairy below. Lemma apex acute; awned; 1 -awned. Principal lemma awn 12-30 mm long overall. Palea oblong; 1 length of lemma. Palea keels winged; narrowly winged; ciliate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3. Stigmas 2. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; 5-6 mm long; hairy at apex.
Distribution
Asia-temperate: eastern Asia.
Reference
Triticeae. Koyama 1994.
[GB]

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