Difference between revisions of "Ranunculus sect. Hecatonia"
Prodr. 1: 30. 1824.
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name=Ranunculus sect. Hecatonia | name=Ranunculus sect. Hecatonia | ||
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|authority=de Candolle | |authority=de Candolle | ||
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|publication year=1824 | |publication year=1824 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V3/V3_543.xml |
|genus=Ranunculus | |genus=Ranunculus | ||
|subgenus=Ranunculus subg. Ranunculus | |subgenus=Ranunculus subg. Ranunculus | ||
Revision as of 21:29, 16 December 2019
Plants glabrous or sometimes hirsute. Stems creeping (erect in Ranunculus sceleratus), not bulbous-based, without bulbils. Roots basal and usually also nodal, never tuberous. Leaves all cauline or both basal and cauline; basal and lower cauline leaves similar, petiolate, blades lobed to divided or (submerged leaves) deeply dissected, segments undivided or lobed. Inflorescences 2-25-flowered cymes or axillary solitary flowers. Flowers pedicellate; sepals deciduous soon after anthesis, 3-5; petals 3-14, yellow; nectary scale variable, forming crescent-shaped ridge surrounding but not covering nectary, or funnel-shaped tube surrounding nectary, or distal margin of funnel expanded to form large flap, then nectary sometimes displaced onto flap, glabrous, free margin entire; style present or absent. Fruits achenes, 1-locular; achene body thick-lenticular or compressed-ellipsoid to discoid, 1.2-3 times as wide as thick, not prolonged beyond seed; achene wall thick, smooth or with weak transverse wrinkles, glabrous; margin a thick, low or high corky band or ridge; beak much shorter than achene body or sometimes absent.
Distribution
Widespread, in marshy or aquatic habitats.
Discussion
Species ca. 15 (4 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Stems erect, rooting only at base (very rarely also at proximal nodes). | Ranunculus sceleratus |
| 1 | Stems prostrate and rooting at nodes, or floating and rootless. | > 2 |
| 2 | Leaf blades 0.3–1.2 cm, deeply 3-lobed or -parted, terminal segment entire or distally crenulate; nectary-scale low crescent-shaped ridge surrounding nectary; style 0.1–0.2 mm. | Ranunculus hyperboreus |
| 2 | Leaf blades 0.6–7.3 cm, 3-parted, terminal segment again lobed or dissected; nectary-scale a free flap, nectary on surface of flap; style 0.2–1.2 mm. | > 3 |
| 3 | Styles 0.2–0.4 mm in flower; achenes 1–1.6 mm, beaks 0.4–0.8 mm; petals 3–7 mm | Ranunculus gmelinii |
| 3 | Styles 0.8–1.2 mm in flower; achenes 1.8–2.2 mm, beaks 1–1.8 mm; petals 7–12 mm. | Ranunculus flabellaris |