Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Big-flower Cinquefoil - Drymocallis fissa
Other Names:  Potentilla fissa

Not Documented

Global Rank: G4G5
State Rank: SNA
(see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

External Links





State Rank Reason (see State Rank above)
Drymocallis fissa is not documented with verified specimens in Montana. Herbarium specimens from Carbon, Gallatin, Park, and Stillwater Counties are mis-identified, yet have not yet been annotated or correctly databased (Andrea Pipp personal communication; Lesica et al. 2012; Ertter in Flora of North America 2014). Drymocallis fissa is documented from Colorado, South Dakota, Utah, and Wyoming where it grows on sagebrush slopes, in open forests, or along streambanks and often in rocky or moderately disturbed sites (McGregor et al. 1986; Ertter in Flora of North America 2014).
 
General Description
Adapted from Ertter in Flora of North America 2014

PLANTS: Perennials with erect stems, 12 to 45 cm tall, diameter at base 1.5-3 mm, and more-or-less densely septate-glandular. Caudex branches short to elongate.

LEAVES: Basal and stem (alternately arranged) present and all with petioles and pinnately-divided. Sparsely to moderately hairy.
Basal Leaves: (3–)7–19 cm long. Number of leaflet pairs (4–)5–6(–10). Additional reduced leaflets area sometimes interspersed. Terminal leaflet is usually broadly obovate-cuneate, sometimes elliptic, (1–)1.5–3.5(–5) by (1–)1.5–3(–3.5) cm. Terminal leaflet has single or double teeth, 5–13 per side with a rounded to obtuse apex.
Stem (Cauline) Leaves: 1–3 well developed leaves. Number of leaflet pairs are 4–6(–10).

INFLORESCENCE: A leafy-bracted cyme that has 5–15-flowers, is congested to somewhat open, occupies half of less of the stem's height, and has branches angled from 15–30(–40) degrees. Pedicels area 1–12 mm, short-hairy, and septate-glandular. Flowers open widely. Sepals spread, 6–10 mm in length, and have an acute to acuminate tip. Petals are yellow, overlap and spread, are broadly obovate, 7–11 × 5–11 mm, and equal or exceed the sepals. Stamens are often more than 20 with filaments 1.5–4.5 mm long and anthers (0.7–)1–1.4 mm long. Pistils with thickened styles, 1 mm. Achenes are light brown, 1 mm.

Diagnostic Characteristics
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 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.

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 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 arguta
*Anthers 1 mm or less long.

Range Comments
Colorado, South Dakota, Utah, and Wyoming (Ertter in Flora of North America 2014).

Habitat
Sagebrush slopes, open forests, stream banks, often in rocky or moderately disturbed sites; 1600–3000 meters (Ertter in Flora of North America 2014).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Flora of North America Editorial Committee, eds. (FNA). 2014. Flora of North America North of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. New York, NY: Oxford University Press, Inc. 752 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • McGregor, R.L. (coordinator), T.M. Barkley, R.E. Brooks, and E.K. Schofield (eds). 1986. Flora of the Great Plains: Great Plains Flora Association. Lawrence, KS: Univ. Press Kansas. 1392 pp.
  • Web Search Engines for Articles on "Big-flower Cinquefoil"
Login Logout
Citation for data on this website:
Big-flower Cinquefoil — Drymocallis fissa.  Montana Field Guide.  .  Retrieved on , from