Robert W. Freckmann Herbarium


  Prenanthes aspera Michx. image
Photographer: Kenneth J. Sytsma           

Kitty Kohout

Kenneth J. Sytsma
Family Asteraceae
Prenanthes aspera Michx.
rough rattlesnake-root, rough white-lettuce
Prenanthes: from prenes for "drooping" and anthe for "blossom"
aspera: Latin for "rough" or "harsh" from coarse nature of leaves
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Endangered
Plant: erect, perennial, 2'- 5 1/2' tall forb with milky juice; stems usually with rough hairs
Flower: head 1/2" wide, with cream ray flowers, bracts (phyllaries) densely hairy; inflorescence with mostly erect heads in dense, long, narrow clusters; blooms Aug.-Sept.
Fruit:dry seed with yellowish, fluffy pappus
Leaf:alternate, rough especially below, lower leaves tapering to the stalk and falling off early, upper mostly stalkless to clasping
Habitat: dry; prairies
(Glossary)

More Information Natural Communities Herbarium Specimens
All Prenanthes list Google- Images or Text

Flora of North America (off site)
Synonyms 
Nabalus asperus (Michx.) Torr. & A.Gray

         
  Home
Faculty
Botany News/Events
Projects
Book We Recommend
Historical Botanists
Other Links
Botanical Club of Wisconsin (off site)
UW-Stevens Point Biology Dept.
 
Plants of Wisconsin
Vascular Plants
Bryophytes
Ethnobotany
Natural Communities
Botany News/Events
Other Links
Lichens (off site)   
Tom Volk's Fungi (off site)
Taxonomy of Vascular Plants
                          Vascular Plants
Browse by Identification Guides
Family Wildflowers
Genus Trees
Common Names Shrubs
Search by Vines
Names Aquatic-Semi aquatic
Specimens Ferns - Fern Allies
Blooming Times Grasses, Sedges, or Rushes
County & Status Other Resources  
Town Range Taxonomy of Vascular Plants
  WI Checklist & CofC Values
Bryophytes
Browse by:
Common Name
Genus
Search by:
County
 Name
Copyright 2012 Permissions Contact Us Web Map