thimbleberry

(Rubus parviflorus)

               
Conservation Status

IUCN Red List

not yet assessed

thimbleberry

NatureServe

NNR - Unranked

SNR - Unranked

Minnesota

not listed

Wetland
Indicator
Status

Great Plains

FACU - Facultative upland

Midwest

FACU - Facultative upland

Northcentral & Northeast

FACU - Facultative upland

Nativity

Native

Photo by Bill Reynolds
Occurrence

Uncommon but often locally abundant

 
Habitat

Moist to moderate moisture. Forest clearings, woodland openings, thickets, roadsides, power lines. Partial sun.

 
Flowering

May to late July

 
Flower Color

White

 
Height

40 to 80

 

Identification

This is an erect perennial shrub that rises from an underground horizontal stem (rhizome). It can be 40 to 80 long, though in Minnesota it is usually no more than 18 to 48 in height. It often forms large, dense clumps.

A series of biennial stems (canes) are sent up from the perennial rhizome. The canes are erect to ascending, and unbranched. They do not have bristles or prickles. In the first year they are green and are covered with glandular hairs. In the second year they are woody and hairless and the bark is thin, tan, papery, and flaky.

The leaves are large, alternate, deciduous, and long stalked. The leaf stalks are 2¼ to 7 long and are covered with reddish, gland-tipped hairs. At the base of each leaf stalk there is a pair of leaf-like appendages (stipules). The stipules are lance-shaped and ¼ to ¾ long. The leaf blades are velvety to the touch, round to kidney-shaped in outline and about as long as wide. They are usually 4 to 8 long, sometimes up to 12 long. They and are heart-shaped or deeply cut at the base, and are palmately cut into usually 5, sometimes 3, shallow, pointed lobes. The lobes are cut no more than one third of the way to the midvein. The upper surface is green and sparsely to densely covered with short hairs. The lower surface is somewhat lighter green and similarly hairy but with glandular hairs along the main veins. The margins are irregularly toothed or double toothed with sharp, forward-pointing teeth.

The inflorescence is either a single flower or a long-stalked, leafy, flat-topped cluster (corymb) with 2 to 10 large flowers at the end of the stem. They appear from May to late July, peaking in late June to late July. Each flower is in a to 1½ long stalk (pedicel). The pedicel is densely covered with glandular hairs.

The flowers are 1to 2 in diameter. There are 5 sepals, 5 petals, and numerous stamens. The sepals are green, egg-shaped to triangular, and have a narrow, elongated, tail-like tip. They are to 11 16long including the tip. They are covered on the back (outside) with very short, orangish-yellow, gland-tipped hairs; and on the inside with white non-glandular hairs. The petals are white, broadly egg-shaped to nearly circular, and to 1 long. They have a texture like crinkled tissue paper. The stamens are pale yellow.

The fruit is a juicy, fuzzy, broadly hemispheric, to ¾ wide aggregate of multiple drupelets. It is initially pinkish-white, becoming progressively darker pink, eventually bright red when ripe. It matures in early August to mid-September. When ripe it falls intact to the ground.

 
Similar
Species

 

 
Pests and Diseases

thimbleberry stem gall wasp (Diastrophus kincaidii)


Distribution Distribution Map  

Sources: 2, 3, 4, 5, 7, 8, 24, 28.


Comments

Western Species
The primary range for this species is western North America, stretching from New Mexico to to the Pacific coast and north to Alaska. The presence of isolated populations in the Great Lakes region is probably due to a once contiguous range separated by repeated glaciations.


Taxonomy

Family:

Rosaceae (rose)

 

Subfamily:

Rosoideae

 

Tribe:

Rubeae

 

Genus:

Rubus

 

Subgenus:

Anoplobatus

 
Synonyms

Rubacer tomentosum

Rubacer velutinum

Rubus nutkanus

Rubus nutkanus var. velutinus

Rubacer parviflorum

Rubus parviflorus ssp. velutinus

Rubus parviflorus var. bifarius

 

Rubus parviflorus var. grandiflorus

Rubus parviflorus var. heteradenius

Rubus parviflorus var. hypomalacus

Rubus parviflorus var. parvifolius

Rubus parviflorus var. parviflorus

Rubus parviflorus var. velutinus

 
Common
Names

salmonberry

thimbleberry

western thimbleberry


 

 

 

 

 

 

 

 

 

 

Glossary

aggregate fruit

A compound fruit consisting of many separate individual fruits derived from separate ovaries in a single flower, like a raspberry or blackberry.

 

corymb

A flat-topped or convex inflorescence in which the stalked flowers grow upward from various points on the main stem to approximately the same horizontal plane. The outer flowers open first.

 

drupe

A fleshy fruit with a single hard, stone-like core, like a cherry or peach.

 

glandular hairs

Hairs spread over aerial vegetation that secrete essential oils. The oils act to protect against herbivores and pathogens or, when on a flower part, attract pollinators. The hairs have a sticky or oily feel.

 

palmate

Similar to a hand. Having more than three lobes or leaflets that radiate from a single point at the base of the leaf.

 

pedicel

In plants: the stalk of a single flower in a cluster of flowers. In Hymenoptera and Araneae: the narrow stalk connecting the thorax to the abdomen.

 

rhizome

A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.

 

sepal

An outer floral leaf, usually green but sometimes colored, at the base of a flower.

 

stipule

A small, leaf-like, scale-like, glandular, or rarely spiny appendage found at the base of a leaf stalk, usually occurring in pairs and usually dropping soon.

       

Visitor Photos

   
Share your photo of this plant.

Bill Reynolds


  thimbleberry    

       
       

MinnesotaSeasons.com Photos

   

Habitat

  thimbleberry   thimbleberry
       

Plant

  thimbleberry    
       

Infructescence

  thimbleberry   thimbleberry
       

Fruit

  thimbleberry   thimbleberry
       

Leaves

  thimbleberry    
       
       

 

Camera

     

Slideshows

   
     
     
     

 

slideshow

     

Visitor Videos

   
Share your video of this plant.

     
     

Other Videos

 
  Thimbleberry Flowers (Rubus parviflorus)
Wandering Sole TV
 
   
 
About

Published on Jul 6, 2012

Blossoms on thimbleberry shrubs in the East Kootenays.

 
     
  Rubus parviflorus
Eugen Helmbrecht
 
   
 
About

Uploaded on Oct 14, 2009

Dendrology class

 
     
  Rubus parviflorus
wetvideocamera
 
   
 
About

Published on Oct 26, 2013

Thimbleberry is a shrub that grows up to 3 meters in height. Large white flowers in the spring give way to rounded seedy edible berries. June 2013

 
     

 

Camcorder

         

Visitor Sightings

   
Share your sighting of this plant.

Bill Reynolds
6/25/2005

Location: near the lower falls at Gooseberry Falls State park.

 

thimbleberry


     
     
 

MinnesotaSeasons.com Sightings

   


 

 

Binoculars

Last Updated:

About Us | Privacy Policy | Contact Us | © 2017 MinnesotaSeasons.com. All rights reserved.