Plant Image
Flowers


Yavapai County Native & Naturalized Plants

Epilobium hornemanni - Hornemann's willowherb

Synonyms: Epilobium alpinum var. nutans, Epilobium origanifolium
Other Common Names: Hornemann's willowweed
Plant Form: Forb or Subshrub

Family: Onagraceae


   
 
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Leaves
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Plant
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Forb Plant Description

Origin: Native   Life Cycle: Perennial
General Desc: Subterranean scaly branches but without turions (buds capable of growing into a complete plant). Stems 4 to 16 inches, erect or nearly so, without hairs except for the soft short hairs on the descending lines from the bases of the leaves.
Identification notes: Plants of moist environments; rhizomes with fleshy scales, but no winter buds; stems with a few pairs of opposite leaves, up to 12 inches tall; leaves short-stemmed and spreading; flower receptacle extends beyond the ovary, flowers about 3/4 inch long.
Height: 4 to 16 inches


Habitat

Habitat Description: Streambanks and other wet places; found at upper elevations in the mountains.
Plant Communities: Riparian
Elevation: 7000 - 11000 feet


Flower Characteristics

Color: Light purple to purple     Shape: Regular not in clusters     Tubular: Y     Flowering Period: Jul - Aug
Description: Flowers are few and erect. Sepals 1/8 to 1/4 inch long. 4 petals, fused into a cup, 1/4 to 1/2 inch long, with a small notch at the tip, crossed by a few darker lines which extend from the base to almost the outer edge.


Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Round or oval     Leaf Margin: Toothed     Leaf Attachment: Opposite     Leaves Clasp: N
Hairs: Stems     Spines: N
Leaf Description: Leaves mostly opposite, leaf blades oval and slender, 3/4 to 1-1/2 inches long, mostly a blunt tip; the leaf edge is toothed.


Fruit and Seed Characteristics

Fruit Color: Green   
Fruit Type: Capsule
Fruit Notes: Capsules are 1-1/2 to 2 inches long, very slender, less than 1/16 inch thick, narrow and erect; split open when ripe.
Seed Notes: Seeds are 1/16 inch long with drab tuft of hairs (coma).



  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
http://cales.arizona.edu/yavapaiplants/SpeciesDetailForb.php  
Last Updated: Dec 13, 2022
Content Questions/Comments: Email Matt Halldorson  
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