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Nasturtium officinale
  

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About Watercress (Nasturtium officinale) Watercresses (Nasturtium officinale, N. microphyllum; formerly Rorippa nasturtium-aquaticum, R. microphylla) are fast-growing, aquatic or semi-aquatic, perennial plants native from Europe to central Asia, and one of the oldest known leaf vegetables consumed by human beings. It is an invasive species in the Great Lakes region where it was first sighted in 1847. These plants are members of the Family Brassicaceae or cabbage family, botanically related to garden cress and mustard - all noteworthy for a peppery, tangy flavour. The hollow stems of watercress are floating and the leaves are pinnately compound. Watercresses produce small white and green flowers in clusters.
Plant Description
Plant Type
Perennial herb

Dormancy
Evergreen

Flower Color
White, Green

Flowering Season
Spring, Summer, Fall
Spring
Summer
Fall
Winter


Native Status
Native

Natural Setting
Site Type
Wet places

Sun
Sun

Elevation ?
-38' - 10600'

Annual Precip. ?
4.9" - 121.0"

Summer Precip. ?
0.15" - 3.57"

Coldest Month ?
23.8° F - 58.4° F

Hottest Month ?
44.6° F - 87.1° F

Humidity ?
0.03 vpd - 37.68 vpd

Sunset Zones ?
1, 2*, 3*, 4*, 5*, 6*, 7*, 8*, 9*, 10, 11, 12, 13, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Landscaping Information
Common uses
Bogs and Ponds

Nursery Availability
Rarely Available

Other Names
Botanical Names
Rorippa nasturtium-aquaticum


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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