familyPotamogetonaceae
genusStuckenia
speciesStuckenia filiformis
subspeciesStuckenia filiformis subsp. filiformis

Stuckenia filiformis subsp. filiformis

Robert R. Haynes, C. Barre Hellquist
Treatment appears in FNA Volume 22.

Stems 10–30 cm. Leaves: stipules persistent, those on proximal portion of stem tightly clasping or slightly enlarged; 0.2–0.5 mm wide. Inflorescences: peduncles with flowers and/or fruits 4 cm or more apart. Fruits common.


Phenology: Flowering summer.
Habitat: Calcareous waters of ponds, lakes, and streams
Elevation: 0–915 m

Distribution

V22 526-distribution-map.jpg

Greenland, N.W.T., Yukon, Alaska, Europe, Asiaasia

Discussion

No specimens have been seen from British Columbia or Nunavut, but the subspecies is to be expected there.

Selected References

None.

Lower Taxa

None.

"not elongating" is not a number.

... more about "Stuckenia filiformis subsp. filiformis"
RDF feed
Adnation position relational
past +
Anther dehiscence
dehiscing +
Anther fusion
distinct +
Apex shape
short-apiculate +, blunt +  and notched +
Author
Robert R. Haynes +  and C. Barre Hellquist +
Authority
(Persoon) Börner +
Base shape
acute +
Basionyms
Potamogeton filiformis +
Beak prominence
inconspicuous +
Blade atypical width
0.2 cm2 mm <br />0.002 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
Blade length
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Blade shape
linear;filiform +
Blade width
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Coil architecture
full +
Coil quantity
0 (1) +
Distribution
Greenland +, N.W.T. +, Yukon +, Alaska +, Europe +  and Asiaasia +
Elevation
0–915 m +
Embryo course
curved +
Flower presence
absent +
Flower reproduction
bisexual +
Flower some measurement
4 cm40 mm <br />0.04 m <br /> (?) +
Fruit architecture
drupaceous +
Fruit architecture or shape
not +  and beaked +
Fruit coloration
dark-brown +
Fruit length
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Fruit quantity
common +
Fruit shape
obovoid +
Fruit some measurement
4 cm40 mm <br />0.04 m <br /> (?) +
Fruit width
0.15 cm1.5 mm <br />0.0015 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Habitat
Calcareous waters of ponds, lakes, and streams +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Inflorescence orientation
not projecting +
Inflorescence position
axillary +  and terminal +
Inflorescences spike location
submersed +
Inflorescences spike shape
cylindric +  and capitate +
Leaf architecture
sessile +
Leaf arrangement
alternate +
Leaf arrangement or course or shape
linear +
Leaf coloration
opaque +
Leaf growth form or location
floating +
Leaf location
submersed +
Leaf shape
acute +, turgid +  and channeled +
Leaf width
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Ligule fusion
distinct +
Ligule some measurement
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
Margin architecture or shape
entire +
Number of lower taxa
0 +
Ovule orientation
orthotropous +
Ovule position
marginal +
Panicle architecture
not pedunculate +
Peduncle arrangement
apart +
Peduncle atypical some measurement
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Peduncle fragility
pliable +
Peduncle orientation
erect +
Peduncle position or structure subtype
terminal +
Peduncle shape
filiform +
Peduncle size
slender +
Peduncle some measurement
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Phenology
Flowering summer. +
Pistil architecture
short-stipitate +  and stipitate +
Pistil quantity
4 +
Pollen shape
spheric +
Proximal portion architecture or fixation
clasping +
Publication title
Flora fur das deutsche Volk +
Publication year
1912 +
Reference
None +
Rhizome presence
absent +
Scar architecture
ligulate +
Scar arrangement or shape
circular +
Scar shape
auriculate +  and not auriculate +
Seed quantity
1 +
Series quantity
1 +
Sheath duration
not persisting +
Sheath length or size
longer +
Sheath shape
inflated +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/62857cf6bca5c4637d27b113da92d27dbf9962f4/V22/V22 526.xml +
Spike architecture or shape
capitate +
Spike shape
cylindric +  and moniliform +
Spike some measurement
0.5 cm5 mm <br />0.005 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
Stamen position
epitepalous +
Stamen quantity
4 +
Stem architecture
branching +
Stem atypical some measurement
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Stem shape
subterete +
Stem some measurement
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Stipular shape
inflated +
Stipule atypical some measurement
4 cm40 mm <br />0.04 m <br /> (9.5 cm95 mm <br />0.095 m <br />) +
Stipule duration
persistent +
Stipule fusion
adnate +
Stipule quantity
2/3 +
Stipule shape
not tubular +
Stipule size
enlarged +
Stipule some measurement
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Summit arrangement or density
tight +
Summit character
width +
Synonyms
Coleogeton +
Taxon family
Potamogetonaceae +
Taxon name
Stuckenia filiformis subsp. filiformis +
Taxon parent
Stuckenia filiformis +
Taxon rank
subspecies +
Tepal quantity
4 +
Tuber presence
absent +
Turion presence
absent +
Vein quantity
1 (?) +  and 3 (?) +
Verticel atypical quantity
6 (9) +
Verticel quantity
2 (6) +
Volume
Volume 22 +
Whole organism architecture
caulescent +, not rhizomatous +  and rhizomatous +
Whole organism duration
annual +  and perennial +
Whole organism growth form
herb +
X chromosome quantity
13 +