280 PITTONIA. 
A. PEDICELLATA, Greene, p. 175 supra. Nothing can here 
be added to the first account given of this species. It has 
been collected only by Mr. Cusick; and the region yielding 
it is not yet well explored. 
A. NEODIOICA, Greene, p. 184 supra. This has for its center 
of distribution the mountain districts of northern Pennsyl- 
vania. I have found it in Maryland, near Marshall Hall, on 
the Potomac. It occurs in the vicinity of New York City; and 
Mr. Bicknell has collected it as far north as Mt. Desert Island; 
but there is not yet any evidence of its occurring in Canada. 
A. HYPERBOREA, Don, in Engl. Bot. Suppl. t. 2640. 
Gnaphalium hyperboreum, Withering, Arr. 7 ed. iii. 926. 
This is typically a plant of northern Europe, where it usually 
passes for A. dioica, though it differs from that constantly in 
having the usual hoariness as permanent upon the upper as 
upon the lower faces of the leaves. It occurs in Greenland, 
and I refer to it without much hesitancy a high-northern 
specimen collected by Miss Elizabeth Taylor, at Fort Smith, 
on Great Slave River, in 1892. This is preserved in the col- 
lection of the Canadian Survey on sheet n. 11264. 
A. PARVIFOLIA, Nutt. Trans. Am. Phil. Soc. vii. 406, as to 
the specific character (drawn up from the male plant), but 
excluding the female plant with “ purple ” bracts mentioned 
in the note. A. microphylla, Rydb. Bull. Torr. Club, l e 
Nuttall undoubtedly confused two different plants in pub- 
lishing his A. parvifolia; and that from which he drew his 
formal specific character must certainly be taken as the type, 
that is, the dwarf plant, with broad cream-colored or white 
involucral bracts. These bracts are yellowish or white, very 
broad, and obtuse or even truncate in the male plant, but 
narrower and pinkish in the female. The lowest cauline 
leaves in this are distinctly spatulate-dilated upwards, and 
also definitely one-nerved. 
