PEDICULARIS, wood betony, lousewort 
Pedicularis canadensis L., common lousewort, wood betony, 
p. 1366 
f. albescens Steyerm. 
f. canadensis 
P. lanceolata Michaux, swamp lousewort, swamp wood betony, 
p. 1367 
PENSTEMON, beard-tongue 
Penstemon arkansanus Pennell, Arkansas beard-tongue, p. 1344 
P. cobaea Nutt., cobaea beard-tongue, p. 1343 
var. cobaea 
var. purpureus Pennell 
P. digitalis Nutt. ex Sims, smooth beard-tongue [S, M: incl. P. 
alluviorum Pennell] (Koelling, 1964; Cooperrider, 
1976), p. 1343 
f. digitalis 
f. baueri Steyerm. [G: P. digitalis] (the validity of this taxon 
has not been studied critically) 
P. grandiflorus Nutt., large beard-tongue, p. 1342 
P. pallidus Small, pale beard-tongue, p. 1344 
P. tubiflorus Nutt., p. 1343 
SCROPHULARIA, figwort 
Scrophularia lanceolata Pursh, figwort, early figwort, p. 1346 
S. marilandica L., figwort, carpenter’s Square, late figwort, p. 1346 
f. marilandica 
f, neglecta (Rydb. ex Small) Pennell [G, M: S. marilandica] 
(Pennell, 1935) (the validity of this taxon has not been 
Studied critically) 
SEYMERIA (see DASISTOMA) 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
