EXOGENOUS PLANTS. 615 
lakes near the head waters of St. Croix River. Dysodia chrysanthemoides, (Lagasea.) August. Waste 
places about towns. Jowa. Helenium autumnale, (L.) Alluvial soil. Common. Maruta Cotula, (D. C.) 
May-weed. Abundantly naturalized about western towns. Achillea Millefolium, (L.) June. Sand- 
stone rocks. Blue Earth River. Artemisia caudata, (Michx.) Dry prairies and river-banks. Iowa 
and Minnesota. Artemisia Ludoviciana, (Nutt.) Dry rolling prairies. Iowa and Minnesota. Arte- 
misia biennis, (Willd.) Roadsides. Iowa. Artemisia dracunculoides? (Pursh.) Iowa and Minne- 
sota. Gnaphalium decurrens, (Ives.) Old deserted fields. Lake Superior. Antennaria margaritacea, 
(R. Br.) Lake Superior. Antennaria plantaginifolia, (Hook.) April. Dry knolls throughout the 
Northwest. Erechthites hieracifolia, (Raf.) August. Trap-rocks. Falls of St. Croix. Cacalia reni- 
formis, (Muhl.) Copses. Davenport, Iowa. Cacalia atriplicifolia, (L.) Davenport, Iowa. Cacalia 
tuberosa, (Nutt.) Indian plantain. Moist prairies. Iowa and Minnesota. The tubers, from which Mr. 
Nuttall derived the specific name of this plant, have not been noticed by other observers. Senecio inte- 
gerrimus, (Nutt.) June. Alluvial bottoms of Blue Earth River. Senecio aureus, var. Balsamite, (L.) 
Rocky banks. Davenport, Iowa. Cirsium altissimum, (Spring.) Fall prairie thistle. Iowa and Min- 
nesota. Cynthia Virginiana, (Don.) May. Dry hills. Davenport, Iowa. Hieracium Canadense, 
(Michx.) August. Trap-rocks at the Falls of St. Croix. Hieracium scabrum, (Michx.) August. 
Dry hillsides, St. Croix. Hieracium longipilum, (Torr.) This singular species was collected by Mr. 
Randall on the St. Croix, who was struck with its singular appearance, its long hairs beset with dew- 
drops, giving it the appearance of a Cactus. Nabalus albus, (Hook.) August. Edges of woods. St. 
Croix. Nabalus racemosus, (Hook.) September. Moist prairies. Iowa. Nabalus asper, (Torr. and 
Gr.) Dry prairies. Towa. Lygodesmia juncea,(Don.) July. Drift-ridges on the Upper St. Peter’s. 
A characteristic plant on the great western plains. Troximon cuspidatum, (Pursh.) April. Prairies 
of Iowa and Minnesota. Taraxacum densleonis, (Desf.) Dandelion. Lake Superior. Lactuca elon- 
gata,(Muhl.) Wild lettuce. St. Croix. Mulgedium leucophxwcum, (D. C.) Low grounds. Common. 
LoBELIAce.&.—Lobelia cardinalis, (L.) August. Low grounds. Iowa, &e. Lobelia syphilitica, (.) 
August. St. Croix. Lobelia inflata, (.) ‘Indian tobacco. Lake St. Croix. Lobelia spicata, (Lam.) 
July. Prairies. St. Peter’s. 
~ GAMPANULACEZ.—Campanula rotundifolia, (L.) July. Sand-rock. St. Peter’s. Campanula apa- 
rinoides, (Pursh.) July. Bogs. St. Croix. Campanula Americana, (L.) July. Woods. Iowa. 
Specularia perfoliata, (A. D.C.) June. Dry hills. Lowa. 
Ericacha.—Gaylussacia resinosa, (Torr. and Gr.) Black Huckleberry. Found only in a single 
isolated locality, near Davenport, Iowa. Vaccinium macrocarpon, (Ait.) American cranberry. This 
staple native production of the Northwest is nowhere more abundant, or of finer quality, than in the 
region bordering the St. Croix River. In this section of lakes and swamps innumerable, this humble 
plant, with the commonly associated tamerack growth, offers some compensation for the obstacles nature 
seems to have thrown in the way of ordinary cultivation. The marshes in which it abounds are of the 
usual character in other parts, viz., a bed of sphaguum, sinking under the foot, so as to be knee-deep in 
water. The usual vegetable accompaniments are Andromeda polifolia and calyculata, Sarracenia purpurea, 
Menyanthes trifoliata, &c. The season of gathering the fruit lasts from September till snow-fall, and is 
quite an important business among the Indians. The susceptibility of this plant for cultivation being 
now abundantly proved, we may soon expect to see this wholesome and excellent fruit take an importa t 
rank in the commerce of this region. Vaccinium caspitosum, (Michx.) Margins of a lake near Still- 
water, St. Croix. Vaccinium. Pennsylvanicum, (Lam.) Barrens on the Upper St. Croix. This is the 
common Huckleberry, associated with the characteristic growth of the Pinus Banksiana, covering its 
nia naPYHwras 
It seems strange that the species of this useful genus have not been made more the subject of horticul- 
tural examination. Vaccinium Canadense, (Kalm.) Falls of St. Croix. Chiogenes hispidula, (Torr. and 
Sandy shore of Lake Superior. The leaves of this well-known medicinal plant are frequently used asa 
substitute for Kinnikinnic. Gaultheria procumbens, (L.) Common wintergreen. Upper St. Croix. 
Pine Barrens. This abundant plant is frequently used as a substitute for common tea by the French 
voyageurs. Epigea repens, (L.) Trailing arbutus. Upper St. Croix.: Andromeda polifolia, (L.) 
May. Bogs and cranberry marshes. St. Croix. Andromeda calyculata, (L.) Bogs. St. Croix. Le- 
