familyRanunculaceae
genusRanunculus
subgenusRanunculus subg. Ranunculus
sectionRanunculus sect. Epirotes
speciesRanunculus rhomboideus

Ranunculus rhomboideus

Goldie

Edinburgh J. Sci. 6: 329. 1822.

Alan T. Whittemore
Endemic
Treatment appears in FNA Volume 3.

Stems erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. Roots slender, 0.8-1.8 mm thick. Basal leaves persistent, blades ovate to rhombic, undivided or rarely innermost 3-parted, 1.1-5.3 × 0.9-3.6 cm, base obtuse, margins crenate with 5 crenae, apex rounded. Flowers: pedicels pilose; receptacle pilose; sepals 4-6 × 1.5-3 mm, abaxially pilose, hairs colorless; petals 5, 6-8 × 2-4 mm; nectary scale glabrous. Heads of achenes depressed-globose, 4-6 × 5-7 mm; achenes 1.8-2.2 × 1.2-1.8 mm, glabrous; beak slender, curved, 0.2-0.3 mm. 2n = 16.


Phenology: Flowering spring (Apr–Jun).
Habitat: Prairies, or occasionally open woods or thickets
Elevation: 0-900 m

Distribution

V3 860-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Sask., Ill., Iowa, Mich., Minn., Mont., Nebr., N.Dak., S.Dak., Wis.

Discussion

In addition to the range given above, L. D. Benson (1948) cited nineteenth-century specimens from Quebec, New York, Massachusetts, and Rhode Island. No modern specimens have been seen from those areas.

Selected References

None.

Lower Taxa

None.
... more about "Ranunculus rhomboideus"
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2n chromosome quantity
16 +
Achene body length
not prolonged +
Achene body shape
asymmetrically thick-lenticular +  and compressed-globose +
Achene body width or width
1.2-2 times as wide as thick +
Achene length
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Achene pubescence
glabrous +
Achene width
1.2mm;1.8mm +
Anther dehiscence
dehiscing +
Apex shape
rounded +
Author
Alan T. Whittemore +
Authority
Goldie +
Basal leaf architecture
petiolate +
Basal leaf duration
persistent +
Base shape
obtuse +
Basionyms
Ranunculus sect. Marsypadenium +
Beak course
curved +
Beak height or length or size
much shorter +
Beak position or structure subtype
terminal +
Beak presence
absent +
Beak size
slender +
Beak some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Blade architecture
compound +
Blade architecture or shape
undivided +
Blade shape
ovate;rhombic +
Bract architecture or shape
leaflike +
Bract presence
absent +
Bract size
large +  and small +
Bracteole architecture
sepaloid +
Bracteole presence
absent +
Capsule arrangement
aggregated +
Capsule shape
globose;cylindric +
Caudex architecture
tuberous +
Cauline leaf architecture
sometimes;sessile;nearly sessile +
Cauline leaf arrangement
alternate +
Crena quantity
5 +
Cyme architecture
1-50-flowered +
Cyme some measurement
0 cm0 mm <br />0 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Distal leaf architecture
sessile +
Distribution
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Ill. +, Iowa +, Mich. +, Minn. +, Mont. +, Nebr. +, N.Dak. +, S.Dak. +  and Wis. +
Elevation
0-900 m +
Embryo size
small +
Endosperm quantity
abundant +
Filament shape
filiform +
Flower architecture
pedicellate +
Flower architecture or arrangement or growth form
solitary +
Flower architecture or shape
symmetric +
Flower prominence
showy +  and inconspicuous +
Flower quantity
3;12 +
Flower reproduction
bisexual +
Fruit atypical quantity
5 (6) +
Fruit quantity
3;5 +
Fruits achene architecture
sessile +  and aggregate +
Fruits achene architecture or structure in adjective form
1-locular +
Fruits achene shape
cylindric;obovoid;cylindric;obovoid;globose;lenticular;discoid +
Habitat
Prairies, or occasionally open woods or thickets +
Hair coloration
colorless +
Head length
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Head shape
depressed-globose +
Head width
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Inflorescence position
axillary +  and terminal +
Leaf-blade architecture
compound +
Leaf-blade architecture or shape
undivided +
Leaf-blade shape
reniform +  and linear +
Leaf architecture
compound +  and simple +
Leaf arrangement
whorled +, opposite +  and alternate +
Leaf length
1.1 cm11 mm <br />0.011 m <br /> (5.3 cm53 mm <br />0.053 m <br />) +
Leaf position
innermost +
Leaf shape
3-parted +
Leaf width
0.9 cm9 mm <br />0.009 m <br /> (3.6 cm36 mm <br />0.036 m <br />) +
Margin architecture
palmate +  and pinnate +
Margin architecture or shape
serrate +
Margin fusion
free +
Margin prominence
inconspicuous +
Margin shape
crenate +
Nectary presence
absent +
Nectary scale fusion
joined +
Nectary scale pubescence
glabrous +
Number of lower taxa
0 +
Ovule quantity
1 +
Pedicel pubescence
pilose +
Perianth position
hypogynous +
Petal atypical quantity
22 (150) +
Petal coloration
yellow +
Petal fusion
distinct +
Petal length
6mm;8mm +
Petal prominence
conspicuous +
Petal quantity
5 +
Petal shape
linear +  and orbiculate +
Petal size
reduced +
Petal some measurement
0.1 cm1 mm <br />0.001 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
Petal width
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Petiole architecture or shape
sheathing +
Petiole height or length or size
shorter +
Petiole presence
absent +
Phenology
Flowering spring (Apr–Jun). +
Pistil architecture
simple +
Pistil quantity
4 +  and 250 +
Publication title
Edinburgh J. Sci. +
Publication year
1822 +
Receptacle pubescence
pilose +
Reference
None +
Rhizome architecture
tuberous +
Ridge position
low +
Ridge size or width
narrow +
Root architecture
tuberous +
Root position
basal +
Root size
slender +
Root thickness
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Seed architecture
not arillate +  and stalked +
Seed quantity
1;many +
Segment architecture or shape
again +  and undivided +
Segment shape
parted +  and lobed +
Sepal architecture
petaloid +
Sepal architecture or shape
spurred +
Sepal arrangement
imbricate +
Sepal atypical quantity
6 (20) +
Sepal coloration
white;yellow;white;yellow;purple;sometimes;green +
Sepal duration
deciduous +
Sepal fusion
distinct +
Sepal length
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Sepal pubescence
pilose +
Sepal quantity
5 +
Sepal shape
oblong +  and elliptic ovate or lanceolate +
Sepal some measurement
0.1 cm1 mm <br />0.001 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Sepal width
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Side architecture
veined +
Side quantity
3 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V3/V3 860.xml +
Special status
Endemic +
Stamen fusion
distinct +
Stamen quantity
(5-)10-many +
Staminode presence
absent +
Stem-base architecture
bulbous +
Stem architecture
not bulbous-based +
Stem orientation
erect +
Stem pubescence
glabrous +  and pilose +
Stem some measurement
5 cm50 mm <br />0.05 m <br /> (22 cm220 mm <br />0.22 m <br />) +
Stipule presence
absent +
Stolon architecture
tuberous +
Style duration
persistent +
Style presence
absent +
Taxon family
Ranunculaceae +
Taxon name
Ranunculus rhomboideus +
Taxon parent
Ranunculus sect. Epirotes +
Taxon rank
species +
Volume
Volume 3 +
Wall architecture or pubescence or relief
smooth +
Wall width
thick +
Whole organism architecture
rhizomatous +
Whole organism duration
perennial +  and annual +
Whole organism growth form
plant +
Whole organism position
low +
Whole organism pubescence
pubescent +, pilose +, sometimes +  and glabrous +
Whole organism texture
herbaceous +  and woody +
X chromosome quantity
8 +  and 7 +