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Water Star-grass
Heteranthera dubia
About Water Star-grass (Heteranthera dubia) 0 Nurseries Carry This Plant Heteranthera dubia is a species of aquatic plant known by the common names water stargrass and grassleaf mudplantain. It is native to North and Central America where it is widespread from Canada to Guatemala. It lives submersed in freshwater such as rivers and lakes. It is quite variable in appearance. The leaves are different sizes and shapes across individuals, partly genetic variation and partly response to water conditions, for example, the speed and turbulence of surrounding currents. Submersed individuals also have a different stem and leaf morphology from those that occur partially or completely out of the water. The inflorescence bears a single short-lived flower that blooms in the morning and wilts in the evening. It has six yellow perianth parts each less than a centimeter long spreading from a tubular throat one to seven centimeters long. There are three long, thick yellow stamens with curling anthers and one yellow style. The fruit is a capsule containing many winged seeds. The plant sometimes has galls in its tissue, which are caused by the parasitic fungus Membranosorus heterantherae.
Plant Description
Plant Type
Plant Type
Perennial herb

Landscaping Information
Natural Setting
Annual Precipitation: 16.8" - 22.1", Summer Precipitation: 0.44" - 1.26", Coldest Month: 32.8" - 49.2", Hottest Month: 62.3" - 75.3", Humidity: 1.34" - 23.08", Elevation: 68" - 4402"

Alternative Names
Common Names: Grassleaf Mudplantain, Water Stargrass

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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