Ranunculus testiculatus

Crantz

Stirp. Austr. Fasc. 2: 97. 1763

IllustratedWeedyIntroduced
Synonyms: Ceratocephalus orthoceras de Candolle Ceratocephalus testiculatus (Crantz) Roth
Treatment appears in FNA Volume 3.
Stems erect or ascending, not rooting nodally, villous, not bulbous-based. Tuberous roots absent. Basal leaf blades broadly spatulate in outline, 1-2×-dissected, 0.9-3.8 × 0.5-1.5 cm, segments linear, margins entire, apex obtuse to acuminate. Flowers: receptacle glabrous; sepals spreading, 3-6 × 1-2 mm, villous; petals yellow, 3-5 × 1-3 mm. Heads of achenes cylindric, 9-16(-27) × 8-10 mm; achenes 1.6-2 × 1.8-2 mm, tomentose; beak persistent, lanceolate, 3.5-4.5 mm.

Phenology: Flowering spring (Apr–May).
Habitat: Disturbed areas, especially in grassland
Elevation: 400-2500 m

Distribution

V3 762-distribution-map.gif

B.C., Sask., Ariz., Calif., Colo., Idaho, Iowa, Kans., Minn., Mo., Mont., Nebr., Nev., N.Mex., N.Dak., Ohio, Oreg., S.Dak., Utah, Wash., Wyo., native to Eurasia.

Discussion

In North America, Ranunculus testiculatus seems to be expanding its range rapidly in arid and semiarid areas. A second species of this subgenus, R. falcatus Linnaeus [Ceratocephala falcata (Linnaeus) Persoon], has been reported from North America, but all reports seem to be based on misidentified material of R. testiculatus.

Selected References

None.

Lower Taxa

None.

AuthorAlan T. Whittemore +
AuthorityCrantz +
BasionymsUndefined subg. Ceratocephalus +
DistributionB.C. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Iowa +, Kans. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Ohio +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wyo. + and native to Eurasia. +
Elevation400-2500 m +
HabitatDisturbed areas, especially in grassland +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
Introducedtrue +
PhenologyFlowering spring (Apr–May). +
Publication titleStirp. Austr. Fasc. +
Publication year1763 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V3/V3 762.xml +
Special statusIllustrated +, Weedy + and Introduced +
SynonymsCeratocephalus orthoceras + and Ceratocephalus testiculatus +
Taxon familyRanunculaceae +
Taxon nameRanunculus testiculatus +
Taxon parentRanunculus subg. Ceratocephala +
Taxon rankspecies +
VolumeVolume 3 +