familyEquisetaceae
genusEquisetum
subgenusEquisetum subg. Equisetum
speciesEquisetum variegatum
subspeciesEquisetum variegatum subsp. alaskanum

Equisetum variegatum subsp. alaskanum

(A. A. Eaton) Hultén

Acta Univ. Lund. 37(1): 59. 1941.

Richard L. Hauke
Endemic
Basionym: Equisetum variegatum var. alaskanum A.A. Eaton in Merriam, Harriman Alaska Exped. 5: 390. 1904
Treatment appears in FNA Volume 2.

Stems 26–55 cm; teeth all black or with obscure white margins, 8–14, incurved.


Phenology: Cones maturing in late summer, or cones overwintering and shedding spores in spring.
Habitat: Lakeshores, riverbanks, ditches, wet woods, tundra
Elevation: 0–1500 m

Distribution

V2 283-distribution-map.gif

B.C., Yukon, Alaska including the Aleutian Islands, Wash.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Equisetum variegatum subsp. alaskanum"
RDF feed
2n chromosome quantity
216 +
Apical band coloration
black +
Author
Richard L. Hauke +
Authority
(A. A. Eaton) Hultén +
Basionyms
Equisetum variegatum var. alaskanum +
Center architecture
hollow +
Cone apex shape
Pointed (?) +
Cone position or structure subtype
terminal +
Cone shape
rounded +
Cone some measurement
0.3 cm3 mm <br />0.003 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Distribution
B.C. +, Yukon +, Alaska including the Aleutian Islands +  and Wash. +
Elevation
0–1500 m +
Form architecture
unbranched +
Gametophyte coloration
green +
Gametophyte growth form or habitat
terrestrial +
Gametophyte reproduction
male +  and unisexual +
Gametophyte size
smaller than female +
Habitat
Lakeshores, riverbanks, ditches, wet woods, tundra +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Larger vallecular canal arrangement
carinal +
Larger vallecular canal size
small +
Leaf arrangement
whorled +
Leaf fusion
fused +
Leaf size
small +
Margin coloration
white +
Margin prominence
obscure +
Margin quantity
8 (14) +
Node fusion
distinct +
Number of lower taxa
0 +
Part fusion
fused +
Phenology
Cones maturing in late summer, or cones overwintering and shedding spores in spring. +
Publication title
Acta Univ. Lund. +
Publication year
1941 +
Reference
None +
Reproductive stem coloration
brown +
Ridge quantity
3 +  and 12 +
Sheath coloration
Green (?) +
Sheath length
1mm;6mm +
Sheath orientation
spreading +
Sheath width
1mm;5mm +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V2/V2 283.xml +
Special status
Endemic +
Species growth form
dimorphic +
Sporangium fixation
attached +
Sporangium orientation
pendent +
Sporangium quantity
5 (10) +
Spore coloration
green +
Spore quantity
1 +
Spore shape
spheric +
Sporophyll architecture
peltate +
Sporophyll arrangement
aggregated +
Sporophyll surface dehiscence
dehiscing +
Sporophyll surface shape
elongate +
Stem architecture
unbranched +
Stem coloration
brown +
Stem duration
persisting +
Stem location
aerial +
Stem reproduction
fertile +
Stem some measurement
26 cm260 mm <br />0.26 m <br /> (55 cm550 mm <br />0.55 m <br />) +
Stomate quantity
single +
Surface arrangement
in bands +  and scattered +
Taxon family
Equisetaceae +
Taxon name
Equisetum variegatum subsp. alaskanum +
Taxon parent
Equisetum variegatum +
Taxon rank
subspecies +
Tip fusion
free +
Tip shape
toothlike +
Tooth architecture
not articulate +
Tooth coloration
with obscure white margins +  and black +
Tooth orientation
incurved +
Tooth quantity
3 (14) +
Volume
Volume 2 +
Whole organism architecture
rhizomatous +
Whole organism duration
perennial +
Whole organism growth form
plant +
Whorl architecture
regular +
X chromosome quantity
108 +
Year quantity
1 +