E-Flora BC: Electronic Atlas of the Flora of British Columbia

Myriophyllum quitense Kunth
waterwort water-milfoil (Andean watermilfoil)
Haloragaceae (Water Milfoil family)

Introduction to Vascular Plants
Once images have been obtained, photographs of this species will be displayed in this window.Click on the image to enter our photo gallery.
Currently no image is available for this taxon.
E-Flora BC Static Map
Distribution of Myriophyllum quitense
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Introduction

According to Ceska and Ceska (2010), Andean watermilfoil is a "South American species that extends to western USA and to British Columbia; also in eastern Canada. It occurs in wind-swept parts of large lakes or in flowing water of rivers. Dried herbarium specimens are dark grey. The lowermost leaves are reduced to bract-like structures and the system of strong whitish roots are the best identification characters of the sterile plants. Winter buds absent."

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial aquatic from a rhizome; stems 20-100 cm long, simple or branched.
Leaves:
In whorls of 4 or 5, 1-2.5 cm long, comb-like and dissected into 13-21 threadlike segments, very gradually transitional to the bracts; bracts conspicuous, oblong triangular, 7-10 mm long and from comb-like to lightly sharp-toothed; winter buds absent.
Flowers:
Inflorescence simple to conspicuously forked, submersed to emergent; flowers subtended by small, whitish, erose to comb-like bracteoles 1-2 mm long; sepals whitish, more or less sharp-toothed to comb-like; petals soon deciduous, about 2.5 mm long; stamens 8, the anthers about 2 mm long; stigmas feather-like.
Fruits:
Mericarps 4, about 2 mm long, glabrous.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Large lakes and rivers in the lowland zone; rare on Vancouver Island; E to PE and S to WA, ID, OR, AZ and MX; S America.

Source: The Illustrated Flora of British Columbia

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Myriophyllum elatinoides Gaudich.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

Species References

Ceska, Oldriska and Adolf Ceska. 2010. Genus Myriophyllum (Haloragaceae) in the Pacific Northwest. Botanical Electronic News #428. Available online.

General References