Website/Catalog  (29 Jan 2010)  
 
Paeonia tenuifolia L. var. latifolia
See Paeonia tenuifolia L. for a description of the species.  The variety latifolia has a taller habit and the leaf segments are broader than the type and less finely cut.  [Hortus, JD].

Horticultural & Botanical History
BM t.926/1806.  OFG f.47/1854.  The variety flore pleno is figured at FS f.308/1848. 

History at Camden Park
Listed in the 1850 and 1857 catalogues [B.399/1850].

Website/Catalog  (1938)  Page(s) 10.  
 
Peonies
Off. Tenuifolia Latifolia (Very Early) Peony specie, bright red, single, blooms 15 days before early double varieties; fern-like foliage. 50¢

Book  (1917)  Page(s) 229.  
 
Tenuifolia...Varieties:...Latifolia (broad leaved).

Website/Catalog  (Aug 1910)  Page(s) 14.  
 
Pivoines herbacées...Variétés nouvelles...Tenuifolia latifolia; magnifique feuillage finement découpé, hauteur 50 centimètres, grandes fleurs simples de 10 à 11 centimètres , carmin vif très chaud, étamines dorées, carpelles un peu velus, floraison vers le 5 mai ...75 centé

[not listed in the 1928-1930 catalogues, but again from 1931 on]

Website/Catalog  (1910)  Page(s) 12.  
 
Single Herbaceous Peonies
89—Tenuifolia Latifolia. Bright red lightly shaded violet; broader petals than the type, dwarf; very early...75¢

Magazine  (Feb 1850)  Page(s) 51.  
 
Herbaceous Peonies.
It is just probable that some of your readers may not know that, in common with all our flowers, very many new varieties of Peonies have been raised from seed, prolonging the blooming season till June; these I propose to describe, not forgetting our old spring friends, too often neglected to be planted- all they require; for in all soils and in all seasons they will, with a constancy rare among garden-flowers, gladden our eyes in April with their rich and gaudy blossoms.
The very earliest species is the Pæonia tenuifolia, with its beautiful hair-like leaves, each stem crowned with a crimson globe; for such is the appearance of its flowers before expansion, nestling as it were among its leaves.  P. tenuifolia latifolia and P. tenuifolia fulgida bloom in succession; the latter is remarkable for the extreme brilliancy of its flowers.  So hardy are these species, particularly the first, and so durable in tenacious soils, that a root will endure for fifty years, and bloom constantly every season without cultivation.  I say this on the authority of my father and grandfather. 

Magazine  (1847)  Page(s) 166.  
 
We must not forget to include in this brief description, the varieties of P. tenuifolia, with beautiful fennel-like foliage, and of more humble growth than the preceding. Amongst our collection we have Paeonia tenuifolia latifolia, P. tenuifolia insignis, P. tenuifolia rosea ; but the gem of this section is Paeonia tenuifolia flore pleno, with large double crimson flowers; it is a most graceful sort, and cannot fail to become a general favourite.

Website/Catalog  (1837)  Page(s) 67.  
 
Pæonies.  Pivoines.
57 Broad fennel leaved...Pæonia tenuifolia-latifolia...$1 00

Magazine  (Jul 1836)  Page(s) 255.  
 
Addition à la liste des pivoines insérés dans le précédent numéro , page 228.
Je ne sais comment il s'est fait que la trente-deuxième espéce de pivoine et ses trois variétés n'ont pas impimées dans la liste ci-dessus indiquée. Je prie le lecteur de vouloir bien les y comprendre ainsi qu'il suit:
32. Tenuifolia, Lin.
- laciniata, W.
- insignis, Sab.
- latifolia, Sab.

Magazine  (Apr 1836)  Page(s) Vol. 18, p. 271.  
 
Liste des Pivoines cultivées chez le prince de Salm-Dyck.
PIVOINE, Pœonia, LINN.
II. TIGES HERBACÉES.
B. UNIFLORES. 8. LACINIÉES. Carpelles tomenteuses.
tenuifolia, Lin.
— laciniata, Willd.; P.hybrida, Pall.
— insignis, Sab.
— latifolia , Sab.