46 Rhodora [Marcr 
Hepatica nobilis in its foliage-character stands somewhat inter- 
mediate between the two American species, H. americana and H. 
acutiloba DC., and in its achenes more strongly suggests the latter 
species. The leaves of H. nobilis, however, are much more obtusely 
lobed and have less pronounced sinuses between the lobes. Its invo- 
lucral bracts are more obtuse and its sepals ordinarily broader, so that 
H. acutiloba may appropriately be still maintained as an American 
species. 
Typical Hepatica americana has the flowers blue-lavender, but two 
other conspicuous color-forms are found, one with white sepals and the 
other with rose-pink. These for convenience may be designated 
HEPATICA AMERICANA, forma candida, sepalis albis — Frequent 
througbout the range. Type: rocky woods, Townshend, Vermont, 
April 16, 1912, L. A. Wheeler, in herb. New England Botanical Club. 
HEPATICA AMERICANA, forma rhodantha, sepalis roseis — TYPE 
collected by Mrs. Florence van Fleet Lyman, communicated by C. G. 
Whiting from plants transferred to his garden at Springfield, Massa- - 
chusetts (specimen in Gray Herb.). 
GRAY HERBARIUM. 
POLYMNIA UVEDALIA AND ITS VARIETIES. 
S. F. BLAKE. 
WHILE studying recently the variations in pubescence of a Mexican 
Polymnia, I had occasion to examine the abundant material in the 
Gray Herbarium of the common P. Uvedalia to determine whether 
similar differences were to be found in that species which might throw 
light on the classificatory value of the variations already noted in the 
Mexican plant. Somewhat to my surprise, the specimens of Polymnia 
Uvedalia fell readily into three rather distinct varieties of decided 
geographic trend. The common eastern plant, growing (so far as the 
material at hand indicates) from New York southward to Georgia, 
thence north and west to southern Illinois, is always very strongly 
glandular on the pedicels and branches of the inflorescence with both 
sessile and stalked glands, and the hispid-pilose hairs common to the 
other two forms are rare or wanting. A variation represented by 
