Contains 13 accepted taxa overall.
Characteristics
Classification
Citation
RANUNCULUS Linnaeus, Sp. Pl. 548. 1753.
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TYPE: Ranunculus auricomus Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 104. 1913.
Species
| Scientific Name | Common Name | Status | Photos |
|---|---|---|---|
| Ranunculus abortivus | LITTLELEAF BUTTERCUP | Native FACW (NWPL) FACW (DEP) | |
| Ranunculus hispidus | BRISTLY BUTTERCUP | Native | |
| Ranunculus hispidus var. nitidus | BRISTLY BUTTERCUP; MARSH BUTTERCUP | Native FAC (NWPL) FACW (DEP) | |
| Ranunculus laxicaulis | MISSISSIPPI BUTTERCUP | Not Native Endangered-State OBL (NWPL) | |
| Ranunculus marginatus var. trachycarpus | MARGINED BUTTERCUP | Not Native FACW (DEP) | |
| Ranunculus muricatus | SPINYFRUIT BUTTERCUP | Not Native FACW (NWPL) FACW (DEP) | |
| Ranunculus parviflorus | SMALLFLOWER BUTTERCUP | Not Native FAC (NWPL) FACW (DEP) | |
| Ranunculus platensis | PRAIRIE BUTTERCUP | Not Native FAC (NWPL) FACW (DEP) | |
| Ranunculus pusillus | LOW SPEARWORT | Native FACW (NWPL) FACW (DEP) | |
| Ranunculus recurvatus | BLISTERWORT; HOOKED BUTTERCUP | Native FACW (NWPL) FACW (DEP) | |
| Ranunculus sardous | HAIRY BUTTERCUP | Not Native FAC (NWPL) FACW (DEP) | |
| Ranunculus sceleratus | CURSED CROWFOOT | Native OBL (NWPL) FACW (DEP) | |
| Ranunculus trilobus | THREELOBE BUTTERCUP | Not Native FACW (NWPL) FACW (DEP) |
[Family identification key]
1. All leaf blades entire, undulate, to toothed (rarely lobed or compound)
2
1. At least some leaf blades distinctly lobed (sinuses at least ½ the blade length), divided, or compound, the basal ones sometimes unlobed or undivided
3
2. Petals 4-6, 2-6 mm long; achene 0.8-1 mm long
2. Petals 1-3, 1.5-2.5 mm long; achene 1-1.2 mm long
3. Basal leaves mostly crenate and unlobed
3. Basal leaves lobed, divided, or with coarse teeth
4
4. Flowers sessile, opposite the leaves
4. Flowers pedicellate, axillary
5
5. Fruiting head ellipsoid
5. Fruiting head globose
6
6. Petals 1-2 mm long; achene with hooked bristles
6. Petals 3-12 mm long; achene lacking bristles
7
7. Petals 7-12 mm long
8
7. Petals 3-8 mm long
10
8. Sepals reflexed along well-defined transverse fold 1-3 mm above base; styles laterally stigmatic; achene beak 0.4-0.7 mm long
8. Sepals spreading, sometimes reflexed from base with age; styles stigmatic only at the tip; achene beak 0.8-2.6 mm long
9
9. Stems erect or nearly erect, never rooting at nodes
9. Stems decumbent, sometimes rooting at nodes
10. Petals 3-5 mm long; achene face smooth
10. Petals 4-8 mm long; achene face tuberculate to spiny
11
11. Achene face with low rounded protuberuances; achene beak 0.3–0.7 mm
11. Achene face with spiny protuberances; achene beak 1–2.5 mm
12
12. Peduncle usually longer than the subtending leaf; achene faces but not margin covered with high sharp tubercles or low spines; achene beak ca. 1 mm long
12. Peduncle usually subequal to shorter than the subtending leaf; achene faces but not margin covered with long spines; achene beak 2–2.5 mm long