Book  (Jan 2000)  Page(s) 78.  
 
Longfellow Herbaceous Peony. Brand 1907. A bright red double... the plant endures in the market because of its unfading, clear color both in the garden and as a cut flower...

Website/Catalog  (1948)  Page(s) 67.  
 
Peonies
Strong, 3 to 5 eye divisions
Longfellow. Bright crimson...40¢

Website/Catalog  (1938)  Page(s) 9.  
 
Peonies
Longfellow (Late Mid-season) Large brilliant cherry red. 50¢

Book  (1928)  Page(s) 60.  
 
A List of Sixty Choice Peonies of the More Expensive Varieties
Red Varieties
Longfellow (Brand).  9.0.  We believe that practically everyone considers that, in color, Longfellow is the best of all red peonies.  At the Des Moines show, it appeared in seven of the winning collections.  In the class calling for twenty red blooms of one variety, we were first with Longfellow.  At the Minneapolis show held a few days later, this variety again won first in the same class.  It is as striking in the field as in the show room, since it neither fades nor turns dark as do most reds.

Website/Catalog  (1927)  Page(s) 22.  
 
Longfellow (Brand 1907) 
American Peony Society Rating of 9.0 (33 votes)
Bright deep cherry crimson.  Golden stamens surround center petals.  Good bloomer.  Medium height.  Early.  Each $4.00

Book  (1923)  Page(s) 29.  
 
A Few of the Newer American Varieties
Many of the recent and widely advertised peonies have come from the West. Mr. Brand, of Faribault, Minnesota, made the production of new varieties his great specialty. Out of thousands of seedlings, grown in a wholesale and most interesting way, he has selected and placed in commerce about fifty. [...]
In Mary Brand (Brand, 1907) and Longfellow (Brand, 1907) Mr. Brand has presented two red peonies of excellent color. The really good shades of red are few among peonies, and they are always eagerly sought by collectors. But in my garden Mary Brand has proved to be a weak grower and shy bloomer. It evidently comes within the number of western peonies which are not at their best in the eastern climate and soils. Longfellow appears to have a stronger constitution than Mary Brand.
For general garden-purposes, however, especially in the eastern part of the United States, neither of these peonies can take the place of Karl Rosenfield, which is a sturdy, all-round, bright red peony, lusty and free-blooming.