roses

(Rosa spp.)

               
Overview

Rosa (rose) is a genus of perennial, woody, flowering plants with worldwide distribution. It occurs on every continent except Greenland and Antarctica. There are about 140 species of rose worldwide, at least 33 in North America north of Mexico, and 5 in Minnesota, not including plantings in parks and gardens. Most are erect shrubs, some are climbing vines (lianas), some are sprawling stems that may climb over other vegetation. Many hybrids and cultivars have been developed as garden roses. Rose stems are often armed with sickle-shaped, hook-like prickles. The prickles are usually referred to as thorns. However, true thorns are modified stems, while the prickles on roses are outgrowths of the outer layer of stem tissue.

rose (Rosa sp.)

Photo by Alfredo Colon
Identification

Roses have woody stems that are often covered with thorn-like prickles. The leaves are usually pinnately divided into 5 to 11 leaflets, sometimes ternately divided into 3 leaflets, rarely simple. The leaflets are usually toothed and often have prickles on the underside. The lateral leaflets are stalkless or short-stalked. The terminal leaflet is almost always short-stalked. The flowers of all roses have 5 petals except for a single Chinese species that has 4 petals and for flowers that are doubled. The berry-like fruit is called a hip.

See Subordinate Taxa below for identification information.

 
Distribution Distribution Map  

Sources: 2, 3, 4, 5, 7, 8, 24, 28, 29, 30.

 
Comments

 

 
Taxonomy

Family:

Rosaceae (rose)

 

Subfamily:

Rosoideae

 

Tribe:

Roseae

 

Genus:

Rosa

 
Subordinate Taxa

multiflora rose (Rosa multiflora)

prairie rose (Rosa arkansana)

prickly rose (Rosa acicularis ssp. sayi)

smooth rose (Rosa blanda var. blanda)

Wood’s rose (Rosa woodsii var. woodsii)

 
Synonyms

 

 
Common
Names

rose

   

 

 

 

 

 

 

 

 

 

       
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Alfredo Colon
       
  rose (Rosa sp.)    
       
MinnesotaSeasons.com Photos
   

prairie rose (Rosa arkansana)

  prairie rose   prairie rose
       

prickly rose (Rosa acicularis ssp. sayi)

  prickly rose   prickly rose
       

smooth rose (Rosa blanda var. blanda)

  smooth rose   smooth rose
       

 

Camera

     
Slideshows
   
  Rosa sp.
Virens (Latin for greening)
 
  Rosa sp.  
     

 

slideshow

       
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Alfredo Colon
8/9/2019

Location: Woodbury, Minnesota

rose (Rosa sp.)


     
     
 
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Created: 11/9/2019

Last Updated:

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