di cer 
mw Bh eos Ca Peas es > i 
ASTER LISTRIFORMIS 193 
angles especially the basal, more cornered, less rounded, shuttle- 
shaped. See Fic. 32 
N. Y. vic., Znwood, Se. 27,’97; Ft. George, sunburnt dwarf on rocks, Se. 24, 
'96. Staten /., Princes Bay, Oc. 10,'96. Yonkers, Yonkers ave. swamp, chief form 
growing about Stanford Spr., Se. 22, '99. 
24. Aster listriformis sp. nov. 
Red-stemmed diffuse plants of shaded rock-crevices, with listri- 
form or spade-like winged and truncate crenated caulines, long 
triangular sharp serrate axiles, rich maroon disks and rounded 
lingual bracts. 
Name from the leaf-form, L. from Gr. Aiotpov, a spade. 
Fic. 33, plant from Bryn Mawr Park, vic. N. Y., Se. 25,'97, in hb. Bu., b, 
characteristic leaf-form ; æ, typical lower leaf-form. 
Stem strong but brittle, 
slender, terete, smooth, 
nearly straight, deep red or 
almost ebony (but in some 
tough yellow surculi. 
Characteristic leaf-type 
spade-like or  listriform, 
being the truncated half of 
an ellipse, with acute or 
obtuse apex, and with cu- 
are the principal caulines 
remaining at blossoming- 
time, and usually cease 
abruptly with the first axil. 
They are closely and even- 
ly crenate-serrate, or with 
some straight-backed 
teeth, or often with nearly 
all the teeth aquiline. Di- c C Aster listeifoems 
mensions often 24% x 134 Fio, 3% 
in. Sometimes a few 
wings are oval with constriction above and below; and some 
petioles remain slender and unwinged. 
