94 
the lower ones sometimes becoming 2 or 8 feet long: heads pedun- 
culate, ovate-globose (9 lines long), with ovate-lanceolate mostly 
entire cuspidate-tipped bracts shorter than the head, and similar 
bractlets: fruit scaly, about a line long, with short ovate calyx- 
lobes, and long rigid styles.—^, aquaticum Linn., in part. ' 
Dry or damp soil, from New Jersey to Florida, and westward to Min- 
nesota, Missouri, and Texas. FI. July to September. 
Exceedingly variable in height and size of ieaves. 
Var. synchaetum Gray in herb. Smaller, with leaves more 
bristly margined, and bristles in clusters of 2 to 4. 
Florida {Chapman, Curtiss, Palmer), Louisiana, near New Orleans 
{Dr. Ingalls, in 1835). 
2. E. long^ifoiium Cav. Ann. ii, 133. Stem dichotomously 
branching: radical leaves (sometimes 3 or 4 feet long) parallel- 
veined, linear, tapering to a point, entire or rarely with 1 or 2 
bristle-teeth; stem leaves similar but shorter: heads oval, with 
much shorter linear-lanceolate bracts and similar bractlets. 
A Mexican species, collected in this country only by Wright, in 1851, 
at “Las Play as Springs, near the Sierra de los Animos,” New Mexico, 
October. 
The original description calis for rellexed bracts, but Wright’s speci- 
mens show no such character. 
* * Tall and often stout: leaves thick, Imear to oblong, on 
long fistulous 'petioles, entire or somewhat toothed {not spiny'): 
chiefly southern. 
3^ E. Virginianum Lam. Diet. iv. 759. Slender, 1 to 3 
feet high, branching above: radical and lower cauline leaves linear 
to oblong-lanceolate (petioles sometimes a foot long), entii'e or 
with remote small hooked teeth; upper cauline leaves sessile, 
spiny-toothed or laciniate: heads ovate-oblong (6 lines long), with 
lanceolate spiny-toothed or entire reflexed bracts mostly as long as 
the head, and bractlets with 3 spiny cusps, the middle one largest: 
fruit scaly, with prominent lanceolate acuminate-cuspidate calyx- 
lobes equally or exceeding the bractlets. 
Wet places, margins of ponds and streams. New Jersey to Florida and 
Texas. Fi. August and September in the north, June and July in the 
south. 
Mr. Canby sends specimens from Delaware with bracts longer than the 
heads, but in every other respect they conform to the species. 
