Commercially available

• Duchess of Portland
• Duchesse de Portland
• Paestana
• Portland Monthly Crimson Rose
• Portland perpétuelle
• Portland Rose
• Portlandica
• Portlandica semperflorens
• Rosa damascena portlandica bifera
• Rosa menstrua portlandica
• Rosa 'Paestana'
• Rosa portlandia
• R. portlandica
• Rosa portlandica Roess.
• Rosa sessiliflora
• Rosa X paestana 'Duchesse de Portland'
• Rosier de Portland
• Rosier de Portland commun
• Scarlet Four Seasons' Rose
• The Portland Rose

144 favorite votes.  
Average rating: EXCELLENT-.  

Medium red Portland.
Exhibition name: Duchess of Portland (damask perpetual, before 1775)

Bred by Unknown (before 1775).

Damask Perpetual, Portland.  

Red. [Pink to red.]  Mild to strong, damask fragrance.  10 to 15 petals.  Average diameter 3.25".  Medium to large, large, semi-double (9-16 petals), borne mostly solitary, cluster-flowered bloom form.  Spring or summer flush with scattered later bloom.  Leafy sepals buds.  

Armed with thorns / prickles.  5 to 7 leaflets.  

Height: 2' to 47" (60 to 120cm).  Width: 2' to 3' (60 to 90cm).

USDA zone 4b through 9b.  

Mike Lowe says Duchess of Portland is a Damask Perpetual and assigns it a date of 1782...
Parentage uncertain, see References for more information. The speculation that 'Slater's Crimson China' was one of the parents was disproved by DNA Analysis at the Claude Bernard University in Lyon, France.
Sangerhausen describe the color of the bloom of The Portland Rose as light red.