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Nuphar polysepala Engelm
Nuphar lutea ssp. polysepala (Engelm.) E.O. Beal

20 photos.
An aquatic species known as the "yellow pond lily", "yellow water lily", "cow lily",
"brandy bottle", etc.  Information from the National Park Service.

ITIS Taxonomic Serial No. 517578

1.  Early July.  Blossom and leaf.








2.  Early June.  A pair of leaves which have
recently risen to the surface.  Insects
have already been attracted to the leaves.

3.  Early June.  Leaves and bud.  Some of the
leaves are still submerged.

4.  Early July.  Leaves and a bud
which is beginning to open.

5.  Early July.  Leaves and a blossom.
Note that the leaves have been partially
eaten by insects.

6.  Early July.  Buds, blossoms, leaves,
insects and a lesser yellowleg, Tringa

7.  Mid-June.  Central parts of the

8.  Mid-June. Close-up side view of anthers.

9. Early July.  Probably the maturing seed
capsule after the anthers and petals have
been shed.

10. May 14, 2009.  Leaves under water before

11. May 28, 2009. Thaw lake with N. lutea

12.  June 4, 2009.  Later view of the lake with
N.  lutea leaves.

13.  June 25, 2009.  Thaw lake with pond
lilies in bloom.

14.  June 25, 2009.  A pair of blossoms
with leaves.

15.  A lesser yellowleg looking for a meal.

16.  A seed pod.

17.  July 28, 2009.  The seed pod in photo 7
split to show the seeds.

18.  April 26, 2010. A leaf from the previous .
year   The leaf absorbs solar energy, then
transmits it to the ice above and below.

19.  April 26, 2010.  Early stage of the
phenomenon seen in photo 18.

20.  June 25, 2012.  View of a group
of plants from across the lake.


All Photos taken in a thaw
lake south of 134 mile Steese
65° 35.69' N, 144° 36.74' W
Elev. 900 ft.