Juncus alpinoarticulatus
 
Alpine Rush

Two Shoots

Greenbush Bog, 20 km West of Hudson Bay, SK on Highway #3
30-July-2016

Note the plant is a perennial with a rhizome.

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Alpinoarticulatus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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lowland species; NOT [montane to alpine species]

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perennial; NOT [annual]

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flowering stems mostly more than 15 cm tall; NOT [flowering stems 3-15 cm tall]

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leaves basal and cauline; NOT [leaves all basal] , NOT [leaves reduced to sheaths]

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leaves terete; NOT [leaves dorsiventrally flattened], NOT [leaves laterally flattened with the edge toward the stem], NOT [leaves channelled]

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leaves septate with the septa complete

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leaf blades mostly less than 3 mm wide; NOT [leaf blades 3-6 mm wide]

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inflorescence appearing terminal or lateral; NOT [bract of inflorescence appearing as a cylindrical continuation of the stem, inflorescence appearing lateral]

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NOT [inflorescence diffuse, generally more than two-thirds the height of the plant]

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heads more than one; NOT [heads solitary (rarely 2)]

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inflorescence with elongate branches, heads long-peduncled; NOT [inflorescence with short branches, heads short-peduncled]

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bract of the inflorescence flat or channeled on the upper side; NOT [bract of the inflorescence terete]

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heads at most hemispherical; NOT [heads spherical]

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heads more than 5-flowered; NOT [heads with 1-3 (5) flowers]

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flowers erect or ascending; NOT [heads with spreading, often reflexed flowers]

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stamens 3 or 6; NOT [stamens 6]

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anthers shorter than the filaments; NOT [anthers longer than the filaments]

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perianth-segments obtuse; NOT [perianth segments acute]

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capsule shorter, at most not much longer than the perianth; NOT [capsule much longer than the perianth] (FOA)

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capsule as long as or longer than perianth; NOT [capsule as long as or shorter than perianth] (FOA)

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capsule shorter; NOT [capsule 6-9 mm long]

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capsules oblong, abruptly narrowed at the apex ; NOT [capsules lanceolate, tapered at the apex]

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seeds without tail-like appendages; NOT [seeds conspicuously appendaged]

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seeds about 0.4-0.5 mm long; NOT [seeds about 1 mm long]

 

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Juncus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
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leaves often terete, seldom flat and grass-like; NOT [leaves flat or channelled and grass-like]

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leaves glabrous; NOT [leaves more or less hairy, at least when young]

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capsule containing many small seeds; NOT [capsule containing 3 large seeds]

 

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Juncaceae: Answers to key questions in Budd's Flora  leading to this family. 
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plants not aquatic, or if growing in water, most of the plant emersed; NOT [plants aquatic, floating or submerged, with floating leaves or emersed inflorescence]

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flowers not in globular heads; NOT [flowers in globular heads, the upper ones staminate, the lower ones pistillate]

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flowers in branched inflorescences; NOT [inflorescence a dense, single, cylindrical spike 8-15 cm long, 1-2.5 cm thick], NOT [flowers in spike-like racemes]

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perianth in two whorls, each of three segments

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perianth segments inconspicuous and scale-like; NOT [perianth segments conspicuous and often brightly colored], NOT [perianth of greenish sepals and petals]