74 Rhodora | [APRIL 
when well developed, 4 or 5 cm. long; the cauline oblanceolate to 
oblong-lanceolate, mostly large, 3 or 4 cm. long, 5 to 8 mm. wide (in 
occasional specimens as small as in the species) : heads large and full, 
as broad as high : involucre 6 to 8 mm. high, the bracts purple, brown, 
or green below, with whitish petaloid or hardly scarious tips ; the outer 
blunt or acute, the inner attenuate. — Somesville, Mount Desert Island, 
July 1 and 2, 1897 (Æ. L. Rand); Long Pond road, Willoughby, 
Vermont, July 11, 1898 (G. G. Kennedy). 
A unique species with lemon-tinged heads is characteristic of the 
river-cliffs and ledges along the Mattawamkeag river in southern 
Aroostook county, Maine. This plant, from its usual habitat, may be 
called : 
A. rupicola. Stems slender, 1.5 to 3 dm. high, invested with 
loose flocculent pubescence ; stolons very numerous, short and assur- 
gent, leafy throughout: basal leaves from oblanceolate to narrowly 
obovate-spatulate, mucronate, 1 to 4 cm. long, beneath densely white- 
tomentose, above gray with loose and somewhat arachnoid hairs, with 
age sometimes becoming glabrate ; cauline leaves lanceolate, mucronate, 
dark green, arachnoid-pubescent beneath, slightly arachnoid or glabrate 
above, those midway up the stem 2 or 3 cm. long: heads rather com- 
pactly clustered ; the pedicels generally shorter than the heads: invo- 
lucre of pistillate plant 8 to 10 mm. high; bracts in 4 or 5 series, with 
conspicuous yellowish-white firm papery tips much exceeding the dark 
bases; the short outer obtuse erose ones oblong with dark green and 
brownish slightly arachnoid or glabrate bases; the innermost longer 
ones lance-linear, acute: staminate plant unknown. — Abundant in 
crevices of calcareous-slate ledges and on rocky banks along the Mat- 
tawamkeag River, Island Falls, Maine; the type material collected by 
the author June 9, 1898, no. 2361. A very attractive species, in habit 
somewhat resembling A. neodioica. The leaves, however, are much 
narrower than in that species, and scarcely if at all differentiated into 
blade and petiole. The firmer yellowish-white bracts of the involucre, 
in texture resembling those of Gnaphalium decurrens, are quite unlike 
the bracts of any other known eastern species. 
A. FALLAX, Greene, Pittonia, iii. 321, is a very puzzling plant. In 
its bright-green basal leaves and its large heads and inflorescence it 
strongly resembles 4. Pai; but the plant is quite glandless, the 
young basal leaves are generally slightly arachnoid above, and the 
cauline leaves are reduced as in A. plantaginea. The bracts of 
the involucre resembling those of A. Pardínit, but with the outer gen- 
erally broader and more petaloid, are either purple or greenish. This 
plant, in its characters somewhat intermediate between 4. Parlinii and 
A. plantaginea, though nearer the former, is much more abundant in 
central Maine than either of those species. The following New Eng- 
land specimens have been examined: Sandy field, Milo Junction, 
