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General: Perennial herb from rhizome, without tubers; stems erect, 20-80 cm tall, slender, simple or branched, 4-angled, generally glabrous but nodes short-hairy.
Leaves: Opposite, oblong to lanceolate, 3-8 cm long, 1-3.5 cm wide, tips pointed, bases tapering to a short stalk, margins coarsely, irregularly and deeply toothed or cleft, lower teeth larger; uppermost leaves shallowly toothed to entire.
Flowers: Inflorescence of many head-like, axillary flower clusters; corollas tubular, 4-lobed, white, 2-3 mm long, about the length of calyces; calyx teeth 5, awl-like, short-awned.
Fruits: Nutlets, 4 clustered together, 1-1.5 mm long, 0.8-1.2 mm wide, 3-angled, corky-thickened on edges, smooth and broadly rounded at the top.
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:
20/04/2019 3:13:56 AM
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