familyRosaceae
subfamilyRosaceae subfam. Rosoideae
tribeRosaceae tribe Potentilleae
genusPotentilla
sectionPotentilla sect. Multijugae
speciesPotentilla ovina
varietyPotentilla ovina var. decurrens

Potentilla ovina var. decurrens

(S. Watson) S. L. Welsh & B. C. Johnston

Great Basin Naturalist 42: 30. 1982.

Barbara Ertter
Endemic
Basionym: Potentilla dissecta var. decurrens S. Watson Proc. Amer. Acad. Arts 8: 557. 1873
Synonyms: P. decurrens (S. Watson) Rydberg P. diversifolia var. decurrens (S. Watson) Th. Wolf P. nelsoniana Rydberg
Treatment appears in FNA Volume 9. Treatment on page 172. Mentioned on page 153, 170, 171.

Stems: lengths (1.5–) 2–3 times basal leaves. Basal leaves 2–10 (–13) × 1–3.5 (–5) cm; petiole 0.5–3.5 (–5) cm; lateral leaflets on distal 1/2–2/3 (–3/4) of leaf axis, ± separate, distal leaflets narrowly cuneate-oblanceolate to obovate, (0.5–) 1–2 (–3.5) cm, distal 1/4–1/2 (–3/4) of margin unevenly to pinnately incised 1/2–2/3 (–3/4) to midvein, teeth 2–5 (–7), ovate to oblong, 1–7 × 1–2 mm, surfaces green, hairs absent (except on margins) or sparse, 0.5–1 mm. Achenes 1.5–1.8 mm.


Phenology: Flowering summer.
Habitat: Dry meadows, stony slopes, exposed ridges and summits, alpine and subalpine
Elevation: 2400–3800 m

Distribution

V9 250-distribution-map.jpg

Colo., Idaho, Mont., Nev., Utah, Wyo.

Discussion

Variety decurrens at its most distinctive has elongate cuneate-oblanceolate, glabrate, apically toothed leaflets that are well spaced on the leaf axis. This extreme is most commonly found in the Uinta Mountains of Utah and the Medicine Bow Mountains of Wyoming. Collections from Colorado, Idaho, Montana, and Nevada are more equivocal and might represent hybrids or extreme forms of other (or undescribed) taxa.

Although B. C. Johnston (1980) is provisionally followed in associating var. decurrens with Potentilla ovina, comparisons can also be made with P. drummondii and P. glaucophylla, both placed here in sect. Graciles. Apparent intergradation exists in all directions.

Selected References

None.

Lower Taxa

None.

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... more about "Potentilla ovina var. decurrens"
RDF feed
Achene architecture
not carunculate +
Achene architecture or pubescence or relief
smooth +
Achene arrangement
aggregated +
Achene relief
smooth +  and faintly rugose +
Achene some measurement
1.5mm +  and 1.8mm +
Androecium position
perigynous +
Anther dehiscence
dehiscent +
Anther quantity
1/2 +
Anther some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Apex shape
acute;obtuse +
Apical tuft some measurement
0.5mm +  and 2mm +
Author
Barbara Ertter +
Authority
(S. Watson) S. L. Welsh & B. C. Johnston +
Basal leaf architecture
compound +  and simple +
Basal leaf architecture or shape
pinnate +
Basal leaf arrangement
2-ranked +
Basal leaf atypical length
10 cm100 mm <br />0.1 m <br /> (13 cm130 mm <br />0.13 m <br />) +
Basal leaf atypical width
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Basal leaf length
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Basal leaf width
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Basionyms
Potentilla dissecta var. decurrens +
Blade architecture
foliaceous +
Blade atypical some measurement
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Blade shape
less cordate or reniform +  and narrowly elliptic +
Blade some measurement
0.5 cm5 mm <br />0.005 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Blade texture
coriaceous +
Bract presence
absent +
Bract size
reduced +
Bracteole presence
absent +
Carpel atypical quantity
260 (450) +
Carpel fusion
free +  and distinct +
Carpel pubescence
hairy +  and glabrous +
Carpel quantity
10 (20) +
Cauline leaf atypical quantity
3 (4) +
Cauline leaf quantity
1 (2) +
Distal leaflet architecture or shape
entire +
Distal leaflet atypical length
10 cm100 mm <br />0.1 m <br /> (13 cm130 mm <br />0.13 m <br />) +
Distal leaflet atypical some measurement
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Distal leaflet atypical width
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Distal leaflet fusion
distinct +
Distal leaflet length
2cm (10cm) +
Distal leaflet position or shape
distal +
Distal leaflet quantity
1/2 (2/3-3/4) +
Distal leaflet shape
narrowly cuneate-oblanceolate +  and obovate +
Distal leaflet some measurement
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Distal leaflet width
0.7 cm7 mm <br />0.007 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Distalmost leaflet position
lateral +
Distribution
Colo. +, Idaho +, Mont. +, Nev. +, Utah +  and Wyo. +
Drupe arrangement
not +  and aggregated +
Drupelet arrangement
aggregated +
Elevation
2400–3800 m +
Epicalyx bractlet atypical length
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Epicalyx bractlet atypical quantity
5 (10) +
Epicalyx bractlet length
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Epicalyx bractlet presence
absent +
Epicalyx bractlet quantity
doubled +
Epicalyx bractlet shape
linear-lanceolate +  and narrowly elliptic +
Epicalyx bractlet width
1 cm10 mm <br />0.01 m <br /> (?) +
Filament some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flower architecture
5-merous +
Flower diameter
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flower reproduction
unisexual +  and bisexual +
Follicle arrangement
not +  and aggregated +
Fruit duration
deciduous +
Fruit pubescence
on style scar +, hairy +  and glabrous +
Fruit quantity
1;260 +
Fruit shape
ovoid +
Fruit some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Fruits achene arrangement
aggregated +
Gland coloration
red +
Gland count or density
sparse +
Gland presence
absent +
Gland prominence
inconspicuous +  and obscured +
Gland quantity
sparse;common;sparse +
Glomerule arrangement
fascicles +
Habitat
Dry meadows, stony slopes, exposed ridges and summits, alpine and subalpine +
Hair architecture
stoloniferous +  and short-rhizomatous +
Hair architecture or function or pubescence
glandular +
Hair course
straight +
Hair density
sparse +  and dense +
Hair fixation or orientation
appressed +
Hair fragility
stiff +
Hair height or length or size
short +
Hair length or size
long +
Hair orientation
less appressed +  and ascending +
Hair presence
absent +
Hair pubescence
cottony +
Hair pubescence or texture
soft +
Hair quantity
sparse +
Hair shape
crisped +
Hair some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Hair vestiture variability
not differentiated +
Hypanthium atypical length
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Hypanthium atypical width
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Hypanthium diameter
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Hypanthium duration
persistent +
Hypanthium length
0.5mm;2.5mm +
Hypanthium shape
turbinate +, patelliform +  and cupulate +
Hypanthium texture
fleshy +
Hypanthium width
2mm;7mm +
Illustration copyright
Flora of North America Association +
Illustrator
Marjorie C. Leggitt +
Inflorescence architecture
cymose +  and (1-)2-11(-20)-flowered +
Inflorescence architecture or arrangement
compact +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Integument architecture
crassinucellate +
Integument quantity
2 +
Lateral leaflet arrangement
separate +
Leaf architecture
bipinnate +, odd-pinnate +, subpalmate +, palmate +  and ternate +
Leaf arrangement
opposite +  and alternate +
Leaf atypical quantity
0 (1) +
Leaf condition
marcescent +
Leaf development
well-developed +
Leaf duration
persistent +
Leaf position
cauline +  and basal +
Leaf quantity
1 (9) +
Leaf season
winter +
Leaf size
reduced +
Leaflet arrangement
not +  and overlapping +
Leaflet atypical quantity
21 (41) +
Leaflet position or structure subtype
terminal +
Leaflet quantity
7 (21) +
Leaflet shape
oblanceolate +  and obovate oblong cuneate flabellate or elliptic +
Lobe shape
linear +  and oblanceolate +
Margin architecture
palmate +  and pinnate +
Margin architecture or shape
entire +
Margin prominence or shape
flat +
Margin shape
incised +
Nectar disc presence
absent +
Number of lower taxa
0 +
Nutlet arrangement
aggregated +
Ovary position
inferior +  and superior +
Ovule arrangement
clustered +, biseriate +  and superposed +
Ovule atypical quantity
2 (5) +
Ovule position
basal +
Ovule quantity
1 +
Pedicel atypical some measurement
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Pedicel course
straight +
Pedicel orientation
recurved +
Pedicel presence
absent +
Pedicel some measurement
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Perianth position
perigynous +
Petal arrangement or shape
elliptic +
Petal atypical length
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Petal atypical quantity
5 (?) +  and 10 (?) +
Petal atypical some measurement
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Petal coloration
yellow +
Petal fusion
free +  and distinct +
Petal length
4mm;7mm +
Petal length or size
longer +
Petal quantity
5 +
Petal shape
obcordate +
Petal some measurement
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Petal variability
equal +
Petal width
0.35 cm3.5 mm <br />0.0035 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Petiole atypical some measurement
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Petiole presence
absent +
Petiole some measurement
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Phenology
Flowering summer. +
Pistil atypical quantity
250 (450) +
Pistil fusion
adnate +, free +, connate +  and distinct +
Pistil quantity
1;250 +
Primary lateral leaflet arrangement
less separate +  and more or less overlapping +
Primary lateral leaflet atypical length
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Primary lateral leaflet atypical width
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Primary lateral leaflet length
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Primary lateral leaflet position or shape
distal +
Primary lateral leaflet quantity
1/2 (3/4) +
Primary lateral leaflet shape
Narrowly cuneate-oblanceolate (More or less obovate) +
Primary lateral leaflet size
largest +
Primary lateral leaflet width
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Primary leaf architecture or shape
pinnate +
Primary leaf atypical some measurement
20 cm200 mm <br />0.2 m <br /> (32 cm320 mm <br />0.32 m <br />) +
Primary leaf some measurement
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Proximal pedicel length or size
often not much longer +
Publication title
Great Basin Naturalist +
Publication year
1982 +
Reference
None +
Seed architecture
not arillate +
Seed atypical quantity
2 (12) +
Seed quantity
2;1 +
Sepal atypical quantity
5 (10) +
Sepal atypical some measurement
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Sepal duration
persistent +
Sepal fusion
free +  and distinct +
Sepal orientation
erect +  and spreading +
Sepal quantity
5 +
Sepal shape
lanceolate +  and broadly ovate or deltate +
Sepal some measurement
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V9/V9 250.xml +
Special status
Endemic +
Stamen atypical quantity
15 (20) +
Stamen fusion
free +  and distinct +
Stamen height or length or size
shorter +
Stamen quantity
20 +
Stem architecture
not rooting +
Stem coloration
reddish +  and green +
Stem growth form or orientation
prostrate +
Stem orientation
prostrate +  and ascending +
Stem orientation or growth form
prostrate to decumbent +
Stem quantity
1 +  and many +
Stem shape
not flagelliform +
Stigma architecture or shape
capitate +
Stipule architecture
palmate +  and pinnate +
Stipule duration
persistent +
Stipule fusion
adnate +
Stipule presence
absent +
Stipule shape
linear;ovate +
Style architecture
jointed +
Style atypical some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Style character
length +
Style duration
deciduous +
Style fusion
distinct +
Style position
subapical +
Style shape
papillate-swollen +  and filiform +
Style size or width
rough-thickened +
Style some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Surface coloration
green +
Surface pubescence
not glaucous +
Synonyms
P. decurrens +, P. diversifolia var. decurrens +  and P. nelsoniana +
Taproot size or width
fleshy-thickened +
Taxon family
Rosaceae +
Taxon name
Potentilla ovina var. decurrens +
Taxon parent
Potentilla ovina +
Taxon rank
variety +
Tooth atypical quantity
5 (7) +
Tooth length
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Tooth quantity
2 (?) +  and 5 (?) +
Tooth shape
ovate +  and oblong +
Tooth width
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Torus development
developed +
Torus presence
absent +
Torus prominence
inconspicuous +
Torus shape
conic +
Torus size
enlarged +
Torus texture
fleshy +
Ultimate tooth atypical length
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Ultimate tooth atypical quantity
9 (11) +
Ultimate tooth length
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Ultimate tooth quantity
2 (9) +
Ultimate tooth shape
Oblong (Ovate) +
Ultimate tooth width
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Volume
Volume 9 +
Whole-organism architecture
not stoloniferous +
Whole-organism arrangement
rosetted +
Whole-organism duration
perennial +
Whole-organism growth form
matted +
Whole organism architecture
unarmed +
Whole organism arrangement
rosetted +
Whole organism duration
biennial +, annual +  and perennial +
Whole organism growth form
plant +  and matted +
Whole organism some measurement
0.1dm (7dm) +
X chromosome atypical quantity
8 +
X chromosome quantity
7 +