512 Lueders—Vegetation of the Toivn Prairie du Sac. 
soaked with water during the greater part of the year, and 
from its consequent wealth of humic acid becomes fitted for a 
very characteristic vegetation which includes about three-fifths 
of all the species found within the limits of the town, and con¬ 
tains an unusually large number of forms peculiar to itself. 
Prominent among these we note: Ranunculus multifidus, Sar- 
racenia purpurea, Viola blanda, Stellaria longifolia, Hypericum 
mutilum, Elodes campanulata, Potentilla palustris, Saxifraga 
Pennsylvanica, Parnassia Caroliniana, Lythrum alatum, Epilo- 
bium lineare, Cicuta bulbifera, Galium trifidum, Eupatorium 
perfoliatum, Boltonia asteroides, Aster Novse-Anglise, A. Tra- 
descanti, A. longifolius, Coreopsis trichosperma, Campanula 
aparinoides, Gentiana Andrewsii, Menyanthes trifoliata, 
Chelone glabra, Veronica anagallis, Cerardia purpurea, Pedicu- 
laris lanceolata, Scutellaria galericulata, Polygonum amphibium, 
P. sagittatum, Salix discolor, S. petiolaris., Spiranthes cernua, 
Habenaria psycodes, Lilium Philadelphicum, Juncus tenuis, 
Acorus Calamus, Typha latifolia, Sagittaria latifolia, Dulichium 
spathaceum, Eriophorum cyperinum, E. polystachyon, Carex 
stricta, C. vulgaris, C. grisea, C. rosea, Leersia oryzoides, 
Zizania aquatica, Cinna arundinacea, Calamagrostis Canadensis, 
Clyceria fluitans, C. Canadensis, and Aspidium thelypteris. 
A similar but smaller and distinct area extends several miles 
along Honey creek. 
Proceeding in a northerly direction we come to a steep ascent. 
A clay bank rises about twenty feet above the level of the 
marsh, and ascending this we come to an undulating area of ir¬ 
regular boundary. Its soil consists in most places of a thin 
layer of vegetable mold resting upon a stratum of porous sand 
varying from one to four feet in thickness, and followed by a 
thin sheet of gravel, which at the southern edge of this area is 
about four feet below the surface but gradually rises till it comes 
to an outcrop along the northern edge. The vegetation of this 
step of the terrace varies with the varying undulation of the 
surface, but the following are some of its most constant com¬ 
ponents: Anemone nemorosa, Lupinus perennis, Baptisia leu- 
cophse, (Enothera pumila, Monarda fistulosa, Corylus Ameri¬ 
cana, Juglans alba, Quercus alba, Q. rubra and Q. macrocarpa. 
