Difference between revisions of "Ranunculus sect. Hecatonia"
Prodr. 1: 30. 1824.
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| − | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>glabrous or sometimes hirsute. <b>Stems</b> creeping (erect in Ranunculus sceleratus), not bulbous-based, without bulbils. <b>Roots</b> basal and usually also nodal, never tuberous. <b>Leaves</b> 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. <b>Inflorescences</b> 2-25-flowered cymes or axillary solitary flowers. <b>Flowers</b> 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. <b>Fruits</b> 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.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>glabrous or sometimes hirsute. <b>Stems</b> creeping (erect in <i>Ranunculus sceleratus</i>), not bulbous-based, without bulbils. <b>Roots</b> basal and usually also nodal, never tuberous. <b>Leaves</b> 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. <b>Inflorescences</b> 2-25-flowered cymes or axillary solitary flowers. <b>Flowers</b> 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. <b>Fruits</b> 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.</span><!-- |
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name=Ranunculus sect. Hecatonia | name=Ranunculus sect. Hecatonia | ||
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|authority=de Candolle | |authority=de Candolle | ||
|rank=section | |rank=section | ||
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|publication year=1824 | |publication year=1824 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_543.xml |
|genus=Ranunculus | |genus=Ranunculus | ||
|subgenus=Ranunculus subg. Ranunculus | |subgenus=Ranunculus subg. Ranunculus | ||
Latest revision as of 21:49, 5 November 2020
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 |