184 DESCRIPTION OF ASTER; DIVARICATI 
form.) Middle and lower leaves broad, subcircular or oval, then 
suddenly incurved into a long straight or falcate acumination, 
doubly and very sharply toothed; the teeth very salient, slender 
and bristle-pointed, either couchant, aquiline or straight-backed, 
continued well into the sinus. Upper leaves and axiles nearly 
typical for A. stilettiformis. Heads often larger, with conspicuous 
milk-white rays, a single bunch or segregated in long-stalked 
clusters. Bracts often a little acutish. 
Ms., d E. L. Sturtevant, in hb. Bu., Au. 16, '89. 
M. V., Tea Lane Brook, Se. 6,97. 
N. x vic., Inwood, Se. 27, 2. Mosholu, hill, Oc. 22,98; Bryn Mawr Park, 
Se. 26,96 ; Se. 14,98; Se. '99; Black Pool, under Fimbriate tree, Se. 15, 1900; 
Ianthinus rocks, Se. 15, 1900, Se. 15, 1 
Wie IN, T sd Babes, Au. 29, ’96. 
DCs, pe Cr., Oc. 5, '90 
20° ee Intermediate to A. divaricatus L., with 
more ovate leaf-type, forward serrate, and heavy thick rough 
leaves paler beneath ; in rock crevices and the little leaves browned 
in the sun, I in. long or less; plants chiefly 7 in. high ; some- 
times twice that. 
N. Y., vic., Zuwood, Se. 24,'96 ; rocks foot of 165th St, Se. 30, '98 ; Ft. 
George, Se. 24,796 ; Yonkers, rocks at Caryl, Se. '98. 
9, 
21. Aster circularis sp. nov. 
Small delicate wand-like plants with little firm subcircular 
acute leaves, broad sinus, close short sharp curvescent-serrate 
teeth, few close heads, and pale chanfer and obtusish bracts. 
a from the leaf-form. 
G. 30, plant from Tarrytown, N. Y.; Se. 24, °98, in hb. Bu.; 4, charac- 
teristic ie form ; d, occasional lower leaf. 
Se terete, very slender, stiff, usually reddened, 16 in. high, 
Or 
Pull form circular-acute with very abrupt and short acumina- 
tion, very broad conspicuous sinus, and notably close sharp short 
teeth with curving back. Leaves mostly 114 x L in., with delicate 
petiole shorter than the leaf-breadth but continuously developed 
well into the inflorescence. Sinus also continuing far up the 
s 
longer, and show the ovate-acuminate type from which this species 
‘was doubtless derived. Such leaves have longer shallower teeth 
and are intermediate to A. excavatus, 
Inflorescence small, irregular, very short-branched though not 
compact. Bracteals ovate, small and inconspicuous. Heads 
small, 36 in. high, short-rayed, little over 34 in. broad. 
| 2 aes d 2i 
idR XI s. leu a E 
