Plantae > Tracheophyta > Magnoliopsida > Myrtales > Onagraceae > Epilobium > Epilobium glaberrimumEpilobium glaberrimum (glaucus willowherb; smooth willowweed)Synonyms: Epilobium fastigiatum var. glaberrimum (homotypic); Epilobium glaberrimum var. glaberrimum; Epilobium pruinosum Epilobium glaberrimum is a species of willowherb known by the common name glaucous willowherb. This clumping perennial wildflower is native to western North America from central Canada to northern Mexico. It generally grows at some elevation in moist places. This plant is somewhat variable in appearance. It may exceed half a meter in height and has hairless foliage with leaves between one and 8 centimeters long. The flower has four notched petals in purple, pink, or white which may be only a couple of millimeters long to over a centimeter long each. The fruit is a narrow, sticklike capsule 2 to 7 centimeters long. |
| Allergen Potential [1] | Medium | | Screening - Summer [2] | Porous | | Screening - Winter [2] | Porous |  | | Bloom Period [2] | Mid Summer | | Drought Tolerance [2] | Low | | Fire Tolerance [2] | High | | Frost Free Days [2] | 6 months 20 days | | Fruit/Seed Abundance [2] | High | | Fruit/Seed Begin [2] | Summer | | Fruit/Seed End [2] | Summer | | Growth Form [2] | Rhizomatous | | Growth Period [2] | Spring, Summer | | Growth Rate [2] | Slow | | Leaf Type [2] | Deciduous | | Lifespan [2] | Perennial | | Propagation [2] | Seed | | Regrowth Rate [2] | Slow | | Root Depth [2] | 8 inches (20 cm) | | Seed Spread Rate [2] | Moderate | | Seed Vigor [2] | Medium | | Seeds Per [2] | 2999994 / lb (6613860 / kg) | | Shape/Orientation [2] | Erect | | Structure [3] | Herb | | Vegetative Spread Rate [2] | Slow | | | Flower Color [2] | Purple | | Foliage Color [2] | Dark Green | | Fruit Color [2] | White | | | Height [2] | 24 inches (0.6 m) | | | Hardiness Zone Minimum [2] | USDA Zone: 6 Low Temperature: -10 F° (-23.3 C°) → 0 F° (-17.8 C°) | | Light Preference [2] | Mostly Shady | | Soil Acidity [2] | Neutral | | Soil Fertility [2] | Infertile | | Water Use [2] | Moderate |
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Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0
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