Poaceae
Calamagrostis

Calamagrostis foliosa Kearney

First published in Bull. Div. Agrostol. U.S.D.A. 11: 17 (1898)
This species is accepted
The native range of this species is California. It is a perennial and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 30-60 cm long. Culm-internodes scaberulous. Leaves mostly basal. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 2-4 mm long. Leaf-blades involute; 20-50 cm long; 1-2 mm wide. Leaf-blade surface smooth.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle scaberulous above. Panicle contracted, or spiciform; linear; continuous, or interrupted; 5-12 cm long. Primary panicle branches appressed. Panicle axis scaberulous. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 3 mm long; 0.5-0.66 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 3 mm long; 0.5-0.66 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 10 mm long; 1.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 5-7 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; geniculate; 9-10 mm long overall; clearly exserted from spikelet; with twisted column. Rhachilla extension 4-6 mm long; pilose.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
Distribution
North America: southwest USA.
Reference
Aveneae. N Amer Fl 1994.
[GB]

Sources

  • 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

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. 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 2023. 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