Tall Cinquefoil - Drymocallis arguta
Other Names:
Potentilla arguta, Drymocallis convallaria
Native Species
Global Rank:
G5
State Rank:
S4
C-value:
4
Agency Status
USFWS:
USFS:
BLM:
External Links
Perennial from a simple or branched caudex. Stems erect, brown-hirsute and glandular, 25–80 cm. Leaf blades oblong, 6–12 cm long, pinnately divided into 5 to 9 obovate, shallowly lobed, sparsely hairy leaflets. Inflorescence a narrow, stiffly erect, flat-topped, glandular-hairy cyme. Flowers: sepals ovate, 6–7 mm long; bracteoles narrower and shorter; petals white to pale yellow,7–9 mm long. Achenes smooth, ca. 1 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Lesica (2012) treats this species in the genus
Drymocallis.
In general, species of
Drymocallis and
Potentilla can be difficult to identify across their specific ranges because many characteristics are continuous. Variation comes from localized ecotypes, polyploidy genes, hybridization, asexual reproduction without fertilization (apomixis), and/or other sources.
Drymocallis arguta - Tall Cinquefoil
*Basal leaves typically with 2-5 leaflet pairs.
*Stem leaves typically with 1-4 leaflet pairs.
*May have somewhat smaller flowers that open widely when compared to
Drymocallis fissa.
*Relatively congested inflorescence and lateral branches that are erect or strongly ascending when compared to
Drymocallis glandulosa*Anthers 1 mm or less long.
Drymocallis glandulosa - Sticky Cinquefoil
*Basal leaflets typically with 2-5 leaflet pairs.
*Stem leaves typically with 1-4 leaflet pairs.
*Relatively smaller flowers that open widely when compared to
Drymocallis fissa.
*Relatively open inflorescence and ascending to spreading lateral branches when compared to
Drymocallis arguta*Anthers 1 mm or less long.
Drymocallis fissa - Big-flower Cinquefoil, NOT documented in Montana.
Plants have all of the following characteristics:
*Basal leaves with relatively numerous leaflets (usually 5-6 leaflet pairs), often with additional small ones;
*Stem leaves with 4-6 pairs of leaflets.
*Stem leaves typically with 4-6 leaflet pairs.
*Inflorescence is congested to more-or-less open.
*Large flowers that also open widely;
*Large, elongated anthers, 1-1.4 mm; and
*Thick styles, about 1 mm wide.
Grasslands, steppe, dry meadows, thickets, woodlands; plains, valleys, montane (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).)
