348 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
d. Heads mostly large, the involucres G (rarely 5) to 12 mm. high, 
forming un erect terminal thyrse; species confined in Berkshire 
County to Mt. Greylock and The Dome. 
Heads very large, 8 to 12 mm. high, leaves thin; upper slopes of Mt. 
Greylock »S'. macro phylla. 
Heads medium, 5 to G mm. higli; leaves thick and firm; dry ledges 
on The Dome S. Randii. 
d'. Heads small, involucres 2 to 5 (rarely G) mm. high; species of 
general distribution. 
e. Heads clustered in the axils, or in short spikes from the upper 
axils, but not forming a dense, wand-like j)anicle, or a compact 
pyramidal panicle. 
/. Leaves and stems smooth or nearly so, not hoary or grayish. 
Stem terete (round), leaves all sessile .S'. cae^ia. 
Stem angled, the lower leaves abruptly narrowed to margined 
• petioles S. latifolia. 
/.' Leaves and stems hoary or grayish. 
Rays of the flowers cream-color or nearly white. . . .S. bicolor. 
Rays of the flowers orange-yellow S. hispida. 
e'. Heads forming a dense wand-like or a compact pyramidal panicle. 
g. Stem minutely hoary; plant of dry or sandy soil on rocky 
hill-tops and along the Deerfield R S. puherida. 
g'. Stem glabrous up to the inflorescence; plants of bogs and 
wet meadows, or if in dry thickets only in the southern part 
of the country, (n. b. — S. neglecta, before its racemes 
spread, might be looked for here. It may be distinguished 
in this stage from S. uliginosa by its broader lower leaves.) 
Plant of bogs and wet meadows S. uliginosa. 
Plant of dry open woods and thickets, so far noted only in 
Sheffield S. speciosa. 
c'. Heads in spreading open panicles, the form of inflorescence commonly 
associated with golden-rods. 
h. Leaves commonly veiny, not 3-ribbed (but sometimes 
obscurely triple-nerved), (n. b. — S. uhnifolia might be 
looked for here. It may be distinguished by its thin 
leaves, usually beset with soft hairs beneath.) 
i. Basal leaves long-petioled, conspicuously larger than 
the 10 to 30 (to 40) remote or sub-remote cauline ones. 
j. Stems strongly angled; leaves very rough on the 
upper surface; plant of bogs and swamps. 
tS. patida. 
j'. Stems rounded ornearly so; leaves smooth or smooth- 
ish. 
k. Leaves mostly serrate, the lower and middle cauline 
(as well as the basal) rather abruptly narrowed to 
the base; racemes pubescent S. arguta 
