Difference between revisions of "Potentilla sect. Brevifoliae"
in N. L. Britton et al., N. Amer. Fl. 22(7): 11. 1959.
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|accepted_name=Potentilla sect. Brevifoliae | |accepted_name=Potentilla sect. Brevifoliae | ||
| − | |accepted_authority=(Rydberg) O. Stevens | + | |accepted_authority=(Rydberg) O. Stevens |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in N. L. Britton et al., N. Amer. Fl. | |title=in N. L. Britton et al., N. Amer. Fl. | ||
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|name=Brevifoliae | |name=Brevifoliae | ||
|authority=Rydberg | |authority=Rydberg | ||
| + | |rank=unranked | ||
|publication_title=Monogr. N. Amer. Potentilleae, | |publication_title=Monogr. N. Amer. Potentilleae, | ||
|publication_place=30. 1898 | |publication_place=30. 1898 | ||
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name=Potentilla sect. Brevifoliae | name=Potentilla sect. Brevifoliae | ||
|author=Barbara Ertter;James L. Reveal | |author=Barbara Ertter;James L. Reveal | ||
| − | |authority=(Rydberg) O. Stevens | + | |authority=(Rydberg) O. Stevens |
|rank=section | |rank=section | ||
|parent rank=genus | |parent rank=genus | ||
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|publication year=1959 | |publication year=1959 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_281.xml |
|subfamily=Rosaceae subfam. Rosoideae | |subfamily=Rosaceae subfam. Rosoideae | ||
|tribe=Rosaceae tribe Potentilleae | |tribe=Rosaceae tribe Potentilleae | ||
Latest revision as of 22:55, 5 November 2020
Perennials, tufted to openly matted, not stoloniferous; taproots not fleshy-thickened; vestiture of sparse long hairs, or eglandular hairs absent, glands common to abundant, red. Stems ± erect, not flagelliform, not rooting at nodes, arising laterally to persistent basal rosettes, (0.2–)0.5–1.5(–2.5) dm, lengths 1.5–3(–4) times basal leaves. Leaves: basal not in ranks; cauline 0–2; primary leaves ± pinnate to subpinnate (distal leaflets ± distinct), rarely ternate, 2–7 cm; petiole: long hairs absent or spreading, weak, glands common to abundant; leaflets (3–)5–7, on distal 1/4 or less of leaf axis, usually overlapping, ± flabellate, margins flat, ± whole length unevenly incised 1/2 to nearly to midvein into 3+ lobes these in turn incised 1/4–1/2 to midvein, primary teeth of each lobe usually 2–3, often secondarily toothed, surfaces similar, green, not glaucous, long hairs (if present) weak, cottony hairs absent. Inflorescences (1–)3–10-flowered, ± cymose, open, or solitary flowers. Pedicels straight in fruit, 0.1–1 cm, proximal not much longer than distal. Flowers 5-merous; hypanthium 2.5–4.5 mm diam.; petals yellow, ± obcordate, 3.5–6.5 mm, longer than sepals, apex retuse; stamens ca. 20; styles subapical, filiform, ± papillate-swollen at very base, if at all, 1.4–2 mm. Achenes smooth.
Distribution
nw United States, n Mexico.
Discussion
Species 3 (1 in the flora).
Section Brevifoliae is primarily based on Potentilla brevifolia, distinctive in its abundant short-septate glands and the three to seven overlapping, more or less flabellate leaflets, most often in a subpinnate arrangement. Two Mexican species, P. macdonaldii B. L. Turner and P. richardii Lehmann, are included provisionally in the section. The rounded membranous stipules suggest a close relationship with sect. Aureae, especially P. cristae, which is also abundantly glandular.
Selected References
None.