128 DESCRIPTION OF ASTERS; DIVARICATI 
the outer bracts according with the type for A. divaricatus L.; 
these outer bracts obtuse, and with conspicuously dark tips; the 
tips soon become small and often reduced to a medial line. Rays 
about 8, dull white. Disks soon purplish brown. Hair little de- 
veloped. Heads small, 1 in. or less broad, apt to be quite closely 
clustered, their pedicels not long, usually exceeded by the head. 
Differs from typical A. divaricatus L. in its narrower and pale 
bracts, its broad wings and its slight cordation. Winged forms 
of A. divaricatus L. having broad bracts, connect the two. 
Forms rather dense clumps, by stone walls or in rather damp 
half-shade. L. Erie and the Taconics to Philadelphia, and prob- 
ably to be found accompanying the type through a wider range. 
Examples : 
Ms., Mt. ML eir ett near Bashbish R., Se. 1903 
N. Y. vic., Washington Heights, 97; Vault Hill, p S. Z., Grant City, 
17, Sli iig Lonesome on ses Rock, Oc. 23, ’99; Champenois 
Pinch, stone wall, 1901; Hillview 
Wed geet springy bank on iuda ay Cr. 22, 796. 
Penn. ; Pitia., Barton, fide his bum and nace and fide speci- 
men (top of a Slant quein with Barton's label (reading ** B. alatus mihi "") in 
his Herb., Pg grt with the Phila. Acad. of Sci., as examined by me Nov. 1898. 
Potomac opp. Washington, Se. '87. 
1a? GASH-WINGED form of alatus; tall plants 3 ft. high, or 
weak and effuse; with many broad short gash-toothed wings — 
along most of the petioles. Rays 5 (less often 6) narrow and 
elongated; unlike the broad short rays of the Five-ray form o 
A. divaricatus recorded p. 124. The numerous thin leaves reach 
5x 3 in., the large size continuing well up into the inflorescence. 
The inflorescence itself is sometimes very large and the bract-tips 
very green. Examples: 
N. Y. vic., Vault Hill, Oc. 18,'96, Bi. — Yonkers, Palmer Av. rocks, Se. 26, 
'96; Mott woodroad, Se. 26, '96 ; and twin tree near the last, Se. 17, 98; Stony 
Lonesome, Se. 23, '99. 
Va., Potomac, Roslyn at Aqueduct Br., Se. '87. 
History OF A. DIVARICATUS ALATUS. 
The naturalist Benjamin S. Barton (1766-1815), does not 
seem to have recognized this form, though he collected the type, 
A, divaricatus L. on the Blue Ridge in Penn., in 1802; his her- 
barium (deposited with the Phila. Acad. of Sci.) containing a 
specimen of the latter, labelled by him “ A. corymbosus, North 
Mountain, 1802,” fide Krout. 
Eu MU I i a dL LI ru ui. 0 ee re apes 
