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SUBTAXA PRESENT IN BC
Phalaris arundinacea var. arundinacea
Reed canary grass is a cool season perennial grass species with noticeable creeping rhizomes. It is a sod-forming species. Reed canary grass is listed as native in North America by the USDA, where it is found across the continent in most states and provinces (USDA 2010). However, cultivars brought in for ornamental use and as pasture grasses have been introduced from Europe and Asia. These hybridize with native populations, producing aggressive offspring in the central and western regions of the continent (Invasive.org 2009). This mixture of native and introduced types has resulted in debate about the invasiveness and origins of the species in some regions. This species is tolerant of freezing and emerges early in the spring, giving it a competitive advantage (Global Invasive Species Database 2010). It favours wet, poorly drained sites and may be found in ditches, along the edges of ponds and lakes, in marshlands, and in wet meadows. The earliest collection of this species in the UBC Herbarium is by Agnes L. Hill, 1897, from Port Hardy.
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General: Perennial grass from conspicuous rhizomes; stems 50-150 (200) cm tall.
Leaves: Sheaths open; blades flat, 7-17 mm wide; ligules rounded, usually with irregular, jagged margins, turned backwards, short-hairy externally, 4-10 mm long.
Flowers: Inflorescence a compact panicle, 7-15 (25) cm long, the branches more or less spreading at maturity; glumes slightly unequal, minutely rough and short-hairy, 3-nerved, sharp-pointed, 4.5-5 mm long; sterile lemmas hairy, brownish, 1-1.5 mm long; fertile lemmas nearly smooth, lightly 5-nerved, 3-4 mm long; paleas 2-nerved, nearly equal to the lemmas; lodicules lanceolate, about 0.5 mm long; anthers 2.5-3 mm long.
Notes: Sometimes introduced as a pasture grass. The variegated ornamental form (forma variegata [Parnell] Druce [var. picta L.]) sometimes occurs as a garden escape.
Wet meadows, ditches and lakeshores in the lowland and steppe to subalpine zones; common in S BC, rare northward; circumpolar N to AK, YT and NT, E to NF and S to ME, MA, PA, VA, AL, AR, OK, NM, AZ and CA; Eurasia.
Global Invasive Species Database. 2010. Phalaris arundinacea.Invasive Species Specialist Group (ISSG) of the IUCN Species Survival Commission. Available Online.
Invasive.org. 2009. Invasive Plant Atlas of the United States. US National Park Service, the University of Georgia Center for Invasive Species and Ecosystem Health, and the Invasive Plant Atlas of New England. Available Online.
USDA 2010. Plant profile for Phalaris arundinacea. United States Department of Agriculture. Available Online.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2017. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
19/08/2019 11:10:55 AM
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