367 
tain, Georgia. At all the places where I found it in that region 
its host was Quercus Georgiana, although there were numerous 
other deciduous-leaved trees growing with the latter species. 
‘RUMEX FASCICULARIS n. sp. 
Perennial by a cluster of fusiform tuberous roots, glabrous, of 
a dull, rather dark or olive-green color. Roots in clusters of from 
3-5, 5-10 cm. long; stem lax and weak, 5-6 dm. long, de- 
cumbent and ascending, strongly grooved, abruptly thickened at 
the base and slightly thickened at the nodes; internodes 1-6 cm. 
long; leaves mostly oblong, occasionally a few oblong-ovate or 
Ovate, 7-17 cm. long, 4-7 cm. broad, of much the same size 
throughout and clustered at the shortened end of the stem near 
the inflorescence, acute or obtuse, somewhat undulate and crisped, 
mostly truncate or cordate at the base, sometimes obtuse, thick 
(drying very thin), petioled; petioles stout, 3-7 cm. long, strongly 
dilated at their bases; ocreae thin and brittle, fugacious; panicle 
12-16 cm. long, rather dense in fruit; racemes ascending, 1-5 cm. 
long; pedicels slender, narrowly clavate, winged at the summit, 
deflexed in fruit, 1-2 cm. long, articulated at the base; wings of 
the calyx broadly deltoid, 4 mm. long, 5 mm. broad, undulate, 
strongly nerved, each bearing an ovoid rugose callosity: style- 
segments reflexed on the angles of the achene; achene broadly 
Pyramidal-ovoid, triquetrous, 2 mm. long, chestnut-colored, 
smooth and shining, the faces concave, the angles slightly mar- 
gined. Plate 246. 
A peculiar and striking species on account of its clustered 
leaves. The shape of the latter is different from that of any other 
North American member of the genus. By its inflorescence, 
wings and achene it is related to R. Floridanus and R. verticillatus, 
but the achene is broader and shorter than that of either of those 
two species. The stem is unable to support the weight of the 
leaves and inflorescence and bends over, endeavoring to rise again 
at the end. 
The specimens were collected by Mr. Geo. V. Nash, on his re- 
cent excursion to Florida, in cypress swamps, on the marshy shore 
of Lake Harris, near Eldorado, in the central part of the peninsula. 
“ACER LEUCODERME nN. sp. 
Acer Flovidanum acuminatum Trel. 
A shrub, or small tree reaching a height of eight meters and 
a trunk diameter of from one to five dm., clothed with a smooth 
white bark. Trunk very short, sometimes almost wanting; 
branches (secondary trunks), two to eight together, erect or as- 
