familyRosaceae
subfamilyRosaceae subfam. Rosoideae
tribeRosaceae tribe Potentilleae
genusPotentilla
sectionPotentilla sect. Subviscosae
speciesPotentilla rhyolitica
varietyPotentilla rhyolitica var. rhyolitica

Potentilla rhyolitica var. rhyolitica

Barbara Ertter
Treatment appears in FNA Volume 9. Treatment on page 186.

Stems 0.3–2 dm. Leaves gray-green; long hairs of petioles 1 (–2) mm; leaflets: hairs usually dense, sometimes common. Flowers 2–10; filaments 1.5–2.5 mm; carpels 5–15, styles 2–2.5 mm. Achenes 1.5 mm, smooth to lightly rugose.


Phenology: Flowering Apr–Jun.
Habitat: Rhyolite and quartzite outcrops, in open pine forests
Elevation: 2600–2900 m

Distribution

V9 277-distribution-map.jpg

Ariz.

Discussion

Of conservation concern.

Variety rhyolitica forms dense tufts in outcrops near the summits of the Huachuca and Santa Rita ranges (Cochise and Santa Cruz counties). The name Potentilla viscidula (Rydberg) Rydberg (= P. wheeleri var. viscidula Rydberg) was misapplied to these plants by T. H. Kearney and R. H. Peebles (1951); that name has been lectotypified on the hybrid of P. rhyolitica and P. subviscosa (B. Ertter 2007c).

Selected References

None.

Lower Taxa

None.

"thin" is not a number."dm" is not declared as a valid unit of measurement for this property."-3(-5)timesbasalleaves" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Potentilla rhyolitica var. rhyolitica"
RDF feed
Achene arrangement
aggregated +
Achene relief
smooth +  and lightly rugose +
Achene some measurement
1.5 +
Androecium position
perigynous +
Anther dehiscence
dehiscent +
Anther some measurement
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Apex shape
acute +
Author
Barbara Ertter +
Authority
Ertter +
Basal leaf architecture
palmate +  and ternate +
Basal leaf arrangement
opposite +  and alternate +
Basal leaf atypical some measurement
8 cm80 mm <br />0.08 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Basal leaf some measurement
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Basionyms
Subviscosae +
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
5 (15) +
Cauline leaf quantity
0 (2) +
Central leaflet architecture
petiolulate +
Central leaflet length
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Central leaflet position or shape
distal +
Central leaflet quantity
1/3 +, 1/2 +  and 2/3 +
Central leaflet shape
obovate +  and broadly elliptic +
Central leaflet width
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Distalmost leaflet position
lateral +
Distribution
Ariz. +
Drupe arrangement
not +  and aggregated +
Drupelet arrangement
aggregated +
Elevation
2600–2900 m +
Epicalyx bractlet arrangement or shape
lanceolate-elliptic +
Epicalyx bractlet atypical quantity
5 (10) +
Epicalyx bractlet length
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Epicalyx bractlet presence
absent +
Epicalyx bractlet quantity
5 +
Epicalyx bractlet width
1 cm10 mm <br />0.01 m <br /> (?) +
Filament some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flower architecture
5-merous +, racemiform +, open +, cymose +  and 2-10(-20)-flowered +
Flower architecture or arrangement or growth form
solitary +
Flower diameter
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flower quantity
2 +  and 10 +
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 quantity
abundant;abundant +
Glomerule arrangement
fascicles +
Habitat
Rhyolite and quartzite outcrops, in open pine forests +
Hair architecture
stoloniferous +  and short-rhizomatous +
Hair architecture or function or pubescence
glandular +
Hair atypical some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Hair course
straight +
Hair density
dense +
Hair fixation or orientation
appressed +
Hair fragility
weak +  and more or less stiff +
Hair height or length or size
short +
Hair length or size
long +
Hair orientation
spreading +  and loosely appressed +
Hair presence
absent +
Hair pubescence
cottony +
Hair quantity
common +
Hair shape
crisped +
Hair some measurement
1 cm10 mm <br />0.01 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Hair variability
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
1-10-flowered +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Integument architecture
crassinucellate +
Integument quantity
2 +
Leaf architecture
bipinnate +, odd-pinnate +, subpalmate +, palmate +  and ternate +
Leaf arrangement
opposite +  and alternate +
Leaf atypical quantity
0 (1) +
Leaf coloration
gray-green +
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
separate +  and slightly overlapping +
Leaflet atypical quantity
3 (5) +
Leaflet position or structure subtype
terminal +
Leaflet quantity
3 (?) +
Leaflet shape
orbiculate +, elliptic +  and broadly obovate or cuneate +
Lobe shape
linear +  and oblanceolate +
Margin architecture
palmate +  and pinnate +
Margin architecture or shape
entire +
Margin position or shape
distal +
Margin prominence or shape
flat +
Margin quantity
1/5 (?) +  and 3/4 (?) +
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
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Pedicel course
straight +
Pedicel orientation
recurved +
Pedicel presence
absent +
Pedicel some measurement
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Perianth position
perigynous +
Petal arrangement or shape
elliptic +
Petal atypical quantity
5 (?) +  and 10 (?) +
Petal atypical some measurement
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Petal coloration
bright-yellow +  and paler +
Petal fusion
free +  and distinct +
Petal length
3mm;7mm +
Petal length or size
longer +
Petal quantity
5 +
Petal shape
obcordate +
Petal some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Petal width
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Petiole atypical some measurement
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Petiole hair atypical some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Petiole hair length or size
long +
Petiole hair some measurement
1 +
Petiole presence
absent +
Petiole some measurement
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Phenology
Flowering Apr–Jun. +
Pistil atypical quantity
250 (450) +
Pistil fusion
adnate +, free +, connate +  and distinct +
Pistil quantity
1;250 +
Primary leaf architecture
palmate +  and ternate +
Primary leaf atypical some measurement
10 cm100 mm <br />0.1 m <br /> (18 cm180 mm <br />0.18 m <br />) +
Primary leaf some measurement
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Proximal pedicel length or size
usually not much longer +
Publication title
J. Bot. Res. Inst. Texas +
Publication year
2007 +
Reference
None +
Seed architecture
not arillate +
Seed atypical quantity
2 (12) +
Seed quantity
2;1 +
Sepal atypical quantity
5 (10) +
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
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V9/V9 277.xml +
Special status
Conservation concern +  and Endemic +
Stamen atypical quantity
20 (30) +
Stamen fusion
free +  and distinct +
Stamen height or length or size
shorter +
Stamen quantity
15;20 +
Stem architecture
not rooting +
Stem coloration
reddish +  and green +
Stem growth form or orientation
prostrate +
Stem orientation
pendent +
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
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Style character
length +
Style duration
deciduous +
Style fusion
distinct +
Style position
subapical +
Style shape
papillate-swollen +, tapered-columnar +  and filiform +
Style size or width
rough-thickened +
Style some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Surface coloration
green +  and gray-green +
Surface pubescence
not glaucous +
Taproot size or width
thickened +
Taxon family
Rosaceae +
Taxon name
Potentilla rhyolitica var. rhyolitica +
Taxon parent
Potentilla rhyolitica +
Taxon rank
variety +
Tooth atypical quantity
3 (4) +
Tooth quantity
2 (?) +  and 3 (?) +
Torus development
developed +
Torus presence
absent +
Torus prominence
inconspicuous +
Torus shape
conic +
Torus size
enlarged +
Torus texture
fleshy +
Volume
Volume 9 +
Whole-organism architecture
not stoloniferous +
Whole-organism arrangement
tufted +  and rosetted +
Whole-organism duration
perennial +
Whole organism architecture
unarmed +
Whole organism arrangement
rosetted +
Whole organism duration
biennial +, annual +  and perennial +
Whole organism growth form
herb +  and matted +
Whole organism some measurement
0.1dm (7dm) +
X chromosome atypical quantity
8 +
X chromosome quantity
7 +