Blooms: May-October
Habit: herb
Duration: perennial
Origin: Native
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California; also in Illinois.
Habitat: Ponds and slow-moving streams.
Habit: herb
Duration: perennial
Origin: Native
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California; also in Illinois.
Habitat: Ponds and slow-moving streams.
Species Description:
General: Perennial, aquatic herbs, the stems freely branched, 1-6 dm. long.
Leaves: Leaves 4-5 per whorl, the submersed ones 1.5-3 cm. long, pinnately dissected into 13-23 filiform segments, and gradually transitional to the linear-oblong, 10-15 mm. long, serrate bracts.
Flowers: Inflorescence terminal, immersed to emersed, the flowers single in the axils of the bracts; sepals 4, attached to the top of the inferior ovary; petals 4, pale yellow, 1 mm. long; staminate flowers uppermost on the stem, stamens 4; stigmas very short, smooth.
Fruits: Achene 1.5-2 mm. long.
General: Perennial, aquatic herbs, the stems freely branched, 1-6 dm. long.
Leaves: Leaves 4-5 per whorl, the submersed ones 1.5-3 cm. long, pinnately dissected into 13-23 filiform segments, and gradually transitional to the linear-oblong, 10-15 mm. long, serrate bracts.
Flowers: Inflorescence terminal, immersed to emersed, the flowers single in the axils of the bracts; sepals 4, attached to the top of the inferior ovary; petals 4, pale yellow, 1 mm. long; staminate flowers uppermost on the stem, stamens 4; stigmas very short, smooth.
Fruits: Achene 1.5-2 mm. long.
Accepted Name:
Myriophyllum hippuroides Nutt. ex Torr. & A. GraySynonyms:
(none)
Treated in Flora of the PNW as:
Myriophyllum hippuroides
Additional Resources:
PNW Herbaria Specimens: View list of Myriophyllum hippuroides specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Myriophyllum hippuroides specimens in the WTU Herbarium database.
Washington Flora Checklist: Myriophyllum hippuroides treatment.
E-Flora BC: Myriophyllum hippuroides atlas page.
CalPhotos: Myriophyllum hippuroides images.
USDA Plants Database: Myriophyllum hippuroides.
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
Ben Legler, 2005
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
|
©2013 Burke Museum of Natural History and Culture. All Rights Reserved. Box 353010, University of Washington, Seattle, WA 98195-3010, Phone: 206-543-5590. On the UW campus at 17th Avenue NE and NE 45th Street. |
 WA Native Plant Society |
