1907] Rehder,— Quercus prinoides var. rufescens. 61 
the young branches. This pubescence and the locality suggested 
at first sight a possible cross between Q. prinoides and ilicifolia, 
but as all the other characters of the form are those of Q. prinoides, 
this idea had to be abandoned; moreover, no cross has as yet been 
observed between a Black and a White Oak. No mention of a Q. 
prinoides with the pubescence described could be found in literature, 
but in looking through the Gray Herbarium and the herbaria of the 
Arnold Arboretum and of the New England Botanical Club I found 
at least two specimens which undoubtedly belonged to this form, one 
from Cape Cod and one from the Pine barrens of New Jersey so that 
it may be considered a coast form of Q. prinoides, and as it differs 
also in a few other characters from the type, it seems to deserve a 
varietal designation and may be distinguished as 
QvERCUS PRINOIDES Willd. var. rufescens var. nov. 
A typo recedit foliis subtus non solum albo-tomentosis sed etiam ful- 
vescenti-villosis praecipue secus costam mediam ramulisque hornotinis 
fulvescenti-pubescentibus, foliorum lobis acutiusculis mucrone calloso. 
instructis, etiam foliis obovatis quam ea formi typici omnino minoribus 
et latioribus saepe undulatis. 
The variety differs from the type in the leaves having beneath be- 
sides the close white tomentum a woolly yellowish pubescence par- 
ticularly along the m drib and in the branches being pubescent at least 
when young. The leaves are generally smaller are broader and obo- 
vate with acutish callous-tipped lobes and often undulate margin. 
MASSACHUSETTS: Nantucket Island, between Nantucket and 
Siasconset, Sept. 1902, F. G. Floyd; August 29, 1903, Alfred Rehder; 
Cape Cod, Centreville, damp woods, July 14, 1903, Clara Imogene 
Cheney; New Jersey: Pine barrens of Manchester, August 26, 
1852, A. C. Hexamer. The following specimens must also be re- 
ferred to this variety, though they are somewhat deviating from its 
type. New Jersey, Pine barrens (Herb. Gray) differs in its larger 
leaves; Massachusetts, Jamaica Plain, 1887, C. E. Faxon, has leaves 
with a slighter villous pubescence; North Carolina, Dunsmore, 
Buncombe Co., September 21, 1897, Biltmore Herb. No. 828°, has 
less villous and longer and narrower leaves and comes from the moun- 
tains of western North Carolina. 
The typical Quercus prinoides has the generally larger and often 
oblong-obovate or even oblong leaves more gradually narrowed to- 
ward the apex and covered beneath with a close whitish tomentum, 
which is sometimes reduced to scattered stellate hairs; the branchlets 
