Brachypodium sylvaticum

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False brome
Brachypodium sylvaticum
Brachypodium sylvaticum hivern.jpg
Habitus
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Subfamily: Pooideae
Genus: Brachypodium
Species:
B. sylvaticum
Binomial name
Brachypodium sylvaticum
(Huds.) P.Beauv. (1812)
Synonyms [1]
  • Agropyron sylvaticum(Huds.) Chevall. (1827)
  • Brachypodium pinnatum var. sylvaticum(Huds.) St.-Yves (1934)
  • Brachypodium pinnatum var. sylvaticum(Huds.) Knoche (1921)
  • Brevipodium sylvaticum(Huds.) Á.Löve & D.Löve (1961)
  • Bromus pinnatus var. sylvaticus(Huds.) Wahlenb. (1805)
  • Bromus sylvaticus(Huds.) Lyons (1763)
  • Festuca pinnata var. sylvatica(Huds.) Huds. (1778)
  • Festuca sylvaticaHuds. (1762)
  • Triticum sylvaticum(Huds.) Moench (1777)

Brachypodium sylvaticum, commonly known as false-brome, [2] slender false brome [3] or wood false brome, is a perennial grass native to Europe, Asia and Africa. [4] Its native range includes most of Europe, northwestern Africa, Sudan and Eritrea, Western and Central Asia, the Indian subcontinent, China, Korea, Japan, Malesia, and New Guinea. [1]

Contents

The bunchgrass is most commonly found in forests and woodlands, preferring the shaded canopy, but may grow in open areas. It prefers well drained neutral and calcerous soils, and avoids wet conditions.

Description

Dry inflorescence Brachypodium sylvaticum espiguetes seques.jpg
Dry inflorescence

Brachypodium sylvaticum is a tall tufted perennial bunchgrass that grows up to about a 0.9 metres (3.0 ft) high.

The drooping leaf blade of the plant is dark green, or bright-yellow green, flat and up to 12 mm wide with a fringe of hairs surrounding the edge of the leaf. The leaves do not have auricles. The leaf blade is joined to the hollow culm by the leaf sheath. This hairy sheath is open and surrounds the culm. The culm is pilose (long, soft, hairy), and typically has 4 to 5 nodes. [5] The ligules are blunt, 1–6 millimetres (0.039–0.236 in) long.

The grass has drooping narrow long spikelets of flowers on very short pedicels. The flower head is 6–20 centimetres (2.4–7.9 in) long, the plant flowering in July and August. Its awns are straight and 6–18 millimetres (0.24–0.71 in) long, projecting out of the end of the spikelets.

Subspecies

Two subspecies are accepted. [1]

Wildlife value

Its seeds can be dispersed by wildlife and humans. The caterpillars of some Lepidoptera use it as a foodplant, e.g. the chequered skipper (Carterocephalus palaemon) and the Essex skipper (Thymelicus lineola).

Invasive species in North America

The grass is an introduced species in North America. Brachypodium sylvaticum is an invasive species colonizing new areas and outcompeting native plants. As this species has spread to the Pacific Northwest of the U.S. it has demonstrated a capability of dominating forest understories and open grasslands to the exclusion of all other flora found in those areas.

Recent observations suggest that populations at the leading edge of the expanding range undergo an establishment phase before they can contribute to the local invasion, perhaps because newly colonized populations are suffering from inbreeding depression.

Oregon

Brachypodium sylvaticum is a newly invasive brome species in Oregon that is rapidly expanding in the Pacific Northwest. Although B. sylvaticum appears to be in the early phases of invasion in North America, it has become a noxious weed throughout the Willamette Valley area of Oregon since the late 1980s. [6] It is most likely that B. sylvaticum was first introduced to Oregon in range experiments when accessions from the native range were planted near Eugene and Corvallis in the Willamette Valley using seed obtained from the USDA Office of Foreign Seed and Plant Introduction anywhere between 70 and 80 years ago. [7]

Related Research Articles

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<i>Bromus ramosus</i> Species of grass

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<i>Brachypodium pinnatum</i> Species of grass

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<i>Sporobolus heterolepis</i> Species of flowering plant

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<i>Tragus</i> (plant) Genus of grasses

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<i>Bromus hordeaceus</i> Species of grass

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<i>Briza media</i> Species of grass

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<i>Bromus madritensis</i> Species of grass

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<i>Alopecurus saccatus</i> Species of flowering plant

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<i>Bromus briziformis</i> Species of grass

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<i>Bromus catharticus</i> Species of grass

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<i>Bromus ciliatus</i> Species of grass

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<i>Orcuttia</i> Genus of grasses

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<i>Bromus kalmii</i> Species of grass

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<i>Setaria verticillata</i> Species of grass

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<i>Cymbopogon bombycinus</i> Species of grass

Cymbopogon bombycinus, or citronella grass is a species of perennial grass in the family Poaceae that is native to Australia.

<i>Bromus japonicus</i> Species of grass

Bromus japonicus, the Japanese brome, is an annual brome grass native to Eurasia. The grass has a diploid number of 14.

<i>Glyceria canadensis</i> Species of grass

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References

  1. 1 2 3
  2. BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  3. USDA, NRCS (n.d.). "Brachypodium sylvaticum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 10 January 2016.
  4. Hitchcock 1969. Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.
  5. C E Hubbard (1978). Grasses. Penguin books.
  6. Kaye, T. N. and M. Blakeley-Smith. 2006. False-brome (Brachypodium sylvaticum). Pp. 80-81 in P. D. Boersma, S. E. Reichard, and A. N. van Buren, eds. Invasive species in the Pacific Northwest. University of Washington Press, Seattle.
  7. Cruzan, M. B. 2019. How to make a weed - the saga of the slender false brome invasion in the North American west and lessons for the future. Bioscience 69:469-507. (http://doi.org/https://doi.org/10.1093/biosci/biz051)