84 PITTONIA. 
and petiole, the blade ovate, acute, mucronate, abruptly 
narrowed to a slender petiole of more than its own length, 
the whole leaf an inch long or somewhat less, green and 
scantily silky-lanate above, white beneath with a silky to- 
mentum ; heads 6 to 10, subcorymbose ; bracts oblong-linear, 
the herbaceous portion green, much longer than the scarious 
tips, these often very short or obsolete, but ordinarily from 
semi-oblong and obtuse in the outer, to lanceolate and acutish 
in the inner. 
My specimens of this elegant species are all from the Dis- 
trict of Columbia and adjacent Maryland, and of my own 
collecting in the autumn of 1897 and spring of 1898. I had 
believed them to represent, as a geographical variety, A. 
neodioica ; but the first careful inspection made of the ma- 
terials has disclosed characters which seem to demand the 
recognition of a species. The habitat of the plant is low 
and rather moist open pine groves. In such stations I have 
seen and collected it at Marshall Hall and at Magruder, in 
Maryland, and between University Station and Terra Cotta, 
D.C. It is frequent, though not plentiful, in its localities, 
and never forms extensive patches. No other Antennaria 
has been found associated with it, nor have any male plants 
been seen. The fully mature stolons, with their depressed 
mode of growth and scattered ovate-petiolate leaves, are re- 
markably—for an Antennaria—suggestive of Alsine media. 
A. MEDIA, Greene, Pitt. iii. 286. Stolons short, leafy, rigid 
and subligneous, forming a rather dense mat, their leaves 3 
to $ inch long, spatulate-lanceolate, acutish, white on both 
faces with a permanent wooll y tomentum: flowering branches 
erect, slender, 2 to 6 inches high, lanate throughout, leafy to 
above midway with linear acute leaves, the upper portion 
naked and pedunculiform: heads 4 to 7; in a dense glom- 
erate cluster, or one or more of them distinetly pedicellate 
and thus standing apart from the rest: bracts of involucre 
with dark greenish-brown tips in outline from broadly ob- 
