Drymocallis fissa

(Nuttall) Rydberg

Monogr. N. Amer. Potentilleae, 197. 1898

Common names: Leafy drymocallis or wood beauty
EndemicSelected by author to be illustrated
Basionyms: Potentilla fissa Nuttall in J. Torrey and A. Gray, Fl. N. Amer. 1: 446. 1840
Treatment appears in FNA Volume 9. Treatment on page 284. Mentioned on page 282, 286, 290.
Click plate for higher resolution version.
Illustrator: Marjorie C. Leggitt
Caudex branches short to elongate. Stems tufted to loosely spaced, (1.2–)1.5–3.5(–4.5) dm; base (1.5–)2–3 mm diam., ± densely septate-glandular. Leaves sparsely to moderately hairy; basal (3–)7–19 cm, leaflet pairs (4–)5–6(–10; additional reduced leaflets sometimes interspersed); terminal leaflet usually broadly obovate-cuneate, sometimes elliptic, (1–)1.5–3.5(–5) × (1–)1.5–3(–3.5) cm, teeth single or double, 5–13 per side, apex rounded to obtuse; cauline 1–3, well developed, leaflet pairs 4–6(–10). Inflorescences 5–15-flowered, leafy, congested to ± open, 1/6–1/2 of stem, narrow to wide, branch angles 15–30(–40)°. Pedicels 1–12 mm, short-hairy, septate-glandular. Flowers opening widely; epicalyx bractlets linear-oblanceolate, 3–7 × 1–2 mm; sepals spreading, 6–10 mm, apex acute to acuminate; petals overlapping, spreading, yellow, broadly obovate, 7–11 × 5–11 mm, equal to or exceeding sepals; filaments 1.5–4.5 mm, anthers (0.7–)1–1.4 mm; styles thickened, 1 mm. Achenes light brown, 1 mm.

Phenology: Flowering May–Aug.
Habitat: Sagebrush slopes, open forests, stream banks, often in rocky or moderately disturbed sites
Elevation: 1600–3000 m

Distribution

V9 455-distribution-map.jpg

Colo., S.Dak., Utah, Wyo.

Discussion

Drymocallis fissa is distinctive in its relatively numerous leaflets (often with additional smaller ones), large flowers, and large, elongate anthers. It is most abundant in the Colorado Front Range, extending into the Medicine Bow Mountains of Wyoming. Outlying populations occur at least as far north as the Bighorn Mountains of northern Wyoming and the Black Hills of South Dakota. Tentatively included here are large-anthered populations from the eastern Uintah Mountains of Utah, though these often have fewer leaflets and smaller flowers of unknown color; they may represent a unique taxon worthy of separate recognition. Possible collections of D. fissa from New Mexico, including the type of Potentilla fissa </i>var.<i> major Torrey & A. Gray, are of uncertain placement in that they combine features of D. arguta, D. arizonica, and D. fissa. Reports from other states, including Montana, are probably all based on misidentified specimens.

References

None.

Lower Taxa

No lower taxa listed.

Facts about "Drymocallis fissa"
AuthorBarbara Ertter +
Authority(Nuttall) Rydberg +
BasionymsPotentilla fissa +
Common nameLeafy drymocallis or wood beauty +
DistributionColo. +, S.Dak. +, Utah + and Wyo. +
Elevation1600–3000 m +
HabitatSagebrush slopes, open forests, stream banks, often in rocky or moderately disturbed sites +
IllustratorMarjorie C. Leggitt +
PhenologyFlowering May–Aug. +
Publication titleMonogr. N. Amer. Potentilleae, +
Publication year1898 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V9/V9 455.xml +
Special statusEndemic + and Selected by author to be illustrated +
SynonymsClosterostyles +, Potentilla sect. Closterostyles +, Potentilla subg. Closterostyles + and Potentilla sect. Rupestres +
Taxon familyRosaceae +
Taxon nameDrymocallis fissa +
Taxon parentDrymocallis +
Taxon rankspecies +
VolumeVolume 9 +