Book  (1981)  Page(s) 277.  
 
R. californica 'Plena'. Shrub to 2 m./6.6 ft. high; branches arching, flowers loosely double, warm rose to bright crimson, fragrant, June-July. GSR 4. (= R. 'Theano' Geschwind). 1894.

Book  (1981)  Page(s) 62-63.  
 
cv. [cultivar] 'Plena' - -The name R. californica f. plena Rehd. is based on the semi-double form portrayed as R. californica in Willmott, The Genus Rose, Vol. I, p. 223, t. The plant now grown as 'Plena', which may be a different clone, was introduced to this country ...from the American firm Bobbink and Atkins of New Jersey....A conspicuous feature of the buds is the long and slender tips to the sepals.

Book  (1976)  Page(s) 117.  
 
Rosa californica...Following sorts are cultivated:
'Plena' (R. californica plena Rehd., 'Theano' Geschwind)
Büsche: bis 2 m hoch; Blüten halbgefüllt, seltener gefüllt, duftend, rosa oder hell-karminrot; Blütezeit im Juni/Juli. 1894.

Book  (1940)  Page(s) 441.  
 
R. californica...R. c. plena Rehd. f. With double or semi-double fls. W.R.223,t(c).

Book  (1936)  Page(s) 121.  
 
R. californica flore pleno hort. (non Rehd) (cinnamomea) pink, well double, cluster-flowered = Theano (Geschwind). Sangerhausen

Magazine  (1921)  Page(s) 18.  
 
In New Species, Varieties and Combinations, by Alfred Rehder:
Rosa californica Cham. & Schlect. f. plena syn. R. californica Willmott; R. californica flore pleno Bean, Trees & Shrubs Brit. Isles. (1914)
A form with double or semidouble flowers.

Book  (1919)  Page(s) 421.  
 
R. californica....is represented in gardens by a very pretty double-flowered variety FLORE PLENO, and a dwarf one NANA.

Magazine  (Jul 1910)  Page(s) 266.  
 
Association horticole lyonnaise Procès-verbal de l’Assemblée générale du dimanche 19 juin 1910 ...
Examen des apports. -— Sont déposés sur les tables les produits suivants : — Par M. Lacombe, jardinier chez M. Dumas, à Irigny (Rhône) : ... 3° quelques-unes des meilleures variétés de Roses hybrides de Wichuraiana et Polyanthas, qui sont : Etoile de Mai, Madame Norbert Levavasseur, Miniature, Ma Pâquerette, Mignonnette, Perle d'Or, Crimson Ramblers, Albéric Barbier, Rosa Californica flore pleno, Rose Gallicane à fleurs doubles d’un beau rose, etc.
....A M. Lacombe, pour ses Roses Wichraiana et Polyantha, prime de 2^me classe