Rubus arcticus
 
Stemless Raspberry

Flower Top

Fir River Shelter on Fir River Road, West of Hudson Bay
11-June-2015

Note there are usually five sepals and five petals, but it is not uncommon to find flowers with six of each such as the one depicted above.

bullet

Arcticus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
bullet

leafy stems tufted, herbaceous, from a perennial underground base; NOT [main stems prostrate, elongated, often semi-wooded], NOT [shrubs]

bullet

plants without runners; NOT [delicate plant with long, slender, branched, rooting runners]

bullet

plants less than 3 dm high; NOT [plants 0.5–2 m high]

bullet

stems not prickly

bullet

leaves 3-foliolate; NOT [leaves 5-digitate], NOT [leaves pedate], NOT [leaves 3-5 foliolate, usually pinnate or lobed], NOT [leaves rounded, shallowly several-lobed]

bullet

central leaflet with rounded tip; NOT [central leaflet with pointed tip]

bullet

flowers mostly perfect; NOT [flowers unisexual]

bullet

petals 10-15 mm long; NOT [petals 4-8 mm long]

bullet

petals spreading at maturity; NOT [petals erect]

bullet

petals rose-coloured; NOT [petals white]

 

bullet

Rubus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
bullet

shrubs; NOT [herbs, or with a woody base and otherwise herbaceous], NOT [small trees]

bullet

plants generally taller than 5-15 cm

bullet

leaves compound, distinctly divided into leaflets; NOT [leaves simple]; NOT [leaves lobed, not distinctly divided]

bullet

leaves not linear-dissected; NOT [leaves dissected into linear divisions]

bullet

leaves with 3-5 leaflets; NOT [leaves with 5-11 leaflets], NOT [leaves with 11-17 leaflets]

bullet

sepal bractlets absent; NOT [bractlets alternating with the sepals]

bullet

flowers white; NOT [flowers pink or yellow]

bullet

carpels numerous; NOT [carpel 1], NOT [carpels mostly 5]

bullet

ovary or ovaries superior; NOT [ovary inferior]

bullet

hypanthium shaped like a saucer, cup or urn and free from the ovary; NOT [ovary enclosed in and adnate to the hypanthium]

bullet

fruit more or less fleshy; NOT [fruit dry]

bullet

carpels becoming drupelets (raspberry-like); NOT [carpels becoming achenes, enclosed in a fleshy receptacle]

 

bullet

Rosaceae: Answers to key questions in Budd's Flora  leading to this family. 
bullet

shrubs or trees; NOT [herbs]

bullet

plants NOT climbing

bullet

plants with normal leaves; NOT [succulent, spiny plants with leaves absent or scale-like, inconspicuous]; NOT [leaves all basal, and tubular or with tentacles for catching insects]

bullet

leaves alternate; NOT [leaves opposite]

bullet

leaves compound; NOT [leaves simple]

bullet

leaflets NOT leathery

bullet

leaflets NOT spinose-tipped

bullet

flowers with two floral rings, and with each petal distinct from the others

bullet

flowers perfect; NOT [flowers dioecious or perfect]

bullet

petals 5; NOT [petal (standard) solitary]

bullet

stamens numerous; NOT [stamens 5]

bullet

fruit NOT a legume