EXOGENOUS PLANTS. 617 
common Anise, belonging to a very distinct family, which this plant so closely resembles in taste. 
Lophanthus nepetoides, (Benth.) Falls of St. Croix. Lophanthus scrophularifolius, (Benth.) All three 
of the above species are found side by side at the Falls of St. Croix, and exhibit a fine example of gradation 
of specific characters. Pyenanthemum pilosum, (Nutt.) Dry hills. Iowa. Pyenanthemum laneecola- 
tum, (Pursh.) Thickets in Iowa and Minnesota. Prunella vulgaris, (L.) Common Heal-all. Scutel- 
laria parvula, (Michx.) May. Gravelly borders of the Upper Mississippi. Scutellaria galericulata, 
(L.) Wet places. St. Croix. Scutellaria laterifolia, (L.) Wet places. Iowa and Minnesota. Scu- 
tellaria versicolor, (Nutt.) Copses. Davenport, Iowa. Physostegia Virginiana, (Benth.) July. River 
margins. Upper Mississippi, St. Peter’s, and St. Croix. Leonurus Cardiaca, (L.) Mother-wort. About 
houses. Galeopsis Tetrahit, (L.) Lake Superior. Stachys hispida, (Pursh.) Margins of rushy ponds. 
Iowa. Teucrium Canadense, (L.) ‘Low grounds. St. Croix. 
Boracinacea!.—Onosmodium molle, (Michx.) About gopher-holes, on prairies. Iowa and Minne- 
sota. Lithospermum latifolium, (Michx.) May. Rock Island, Illinois. Batschia Gmelini, (Michx.) 
June. Dry, sandy ridges. Iowa and Minnesota. Batschia canescens, (Michx.) Hoary Puccoon. More 
abundant than the preceding species, and growing on richer soil. Its root furnishes a common dye, 
used by the Indians. Batschia longiflora, (Nutt.) May. Banks of the Mississippi River, near Daven- 
port, Iowa. Mertensia Virginica, (D. C.) April. Lung-wort. Davenport. Echinospermum Lappula, 
(Lehm.) Stick-seed. Waste places. Cynoglossum officinale, (L.) Hound’s-tongue. Roadsides. Cy- 
noglossum Virginicum, (L.) Portage between the St. Croix and Bois Brulé Rivers. Cynoglossum Mori- 
sen (D. C.) Waste pee, about villages. Iowa. 
ACE hyllum Virginicum, (L.) June. Rich woods. Iowa and Minnesota. 
Hydrophyllum appendiculatum, (Michx.) June. Copses. Iowa. Ellisia ambigua, (Nutt.) May. 
An evanescent weed, common about cultivated fields and gopher-holes. Lowa and Minnesota. 
PoLEMONIACE%.—Polemonium reptans, (L.) May. Shady places, near Davenport, Iowa. Phlox 
maculata, (L.) June. Wet places on prairies. Lowa. Phlox pilosa, (L.) June. Common on prairies 
throughout the Northwest. Phlox divaricata, (L.) April. Shady hillsides. Iowa. 
ConVOLVULACEH.—Calystegia sepium, (R. Br.) Bindweed. Copses. Lowa and Minnesota. Cuscuta 
Gronovii, (Willd.) Common dodder. Low an Cuscuta glomerata, (Choisy.) Mississippi bot- 
toms, near Rock Island, Illinois. 
SoLANAcEz.—Datura Stramonium, (L.) Waste jlbeas, interior of Iowa. <A close attendant on the 
steps of the pioneer physician. Physalis viscosa, (L.) Dry fields, lowa and St. Peter's. A narrow- 
leaved variety, which is often confounded with the P. lanceolata of Michaux, is frequently met with. 
Solanum nigrum, (L.). Waste places. St. Croix. 
GENTIANACE®.—Gentiana quinqueflora, (Lam.) Dry prairies, Iowa. Gentiana crinita, (Freel) 
Fringed gentian. Moist grounds, St. Croix. Gentiana Saponaria, (L.) Moist river banks. Upper 
St. Croix. A pure white variety is often met with. Menyanthes trifoliata, (L.) Bogs. St. Croix and 
St. Peter’s. Halenia deflexa, (Griseb.) Bois Brulé River bank and south shore of Lake Superior. 
ApocyNAcE#.—Apocynum androsemifolium, (L.) June. St. Croix. Apocynum cannabinum, (L.) 
River-banks throughout the Northwest. 
ASCLEPIADACE.—Asclepias Cornuti, (De Caisne.) Copses of the Northwest. Apichesjinn phytolac- 
coides, (Pursh.) Copses. St. Croix. Asclepias purpurascens, (L.) Hills. Davenport, Iowa. Asele- 
pias obtusifolia, (Michx.) Dry, sandy prairies, Iowa. Asclepias Meadii, (Torr.) June. Of a singular 
isolated habit, but not rare on dry, rolling prairies. Iowa. Asclepias incarnata, (L.) —— Towa 
and Minnesota. Asclepias tuberosa, (L.) Butterfly-weed. June. Dry prairies. Lowa and Minnesota. 
Asclepias verticillata, (L.) Dry hills. Davenport, Iowa. Acerates longifolia, (HIl.) Moist places, 
Towa. Acerates viridiflora, (Ell.) June. Dry hills and prairies. Towa and Minnesota. 
OLEAcEm.—Several species of Ash (Fraxinus), were observed, but I have not the means at hand for 
identifying them. 
ARISTOLOCHIACE®.—Asarum Canadense, (L.) Wild ginger. Rich woods. Towa and Minnesota. 
Crenopopracea.—Chenopodium album, (L.) Cultivated fields. Iowa. Chenopodium hybridum, 
(L.) St. Croix. Blitum capitatum, (L.) La Pointe. Lake Superior. Acnida cannabina, (L.) St. 
Croix. River margins. 
AMARANTHACE®.—Amaranthus hybridus, (L.) Fields and gopher-holes. Towa and Minnesota. 
Amaranthus greecizans, (I.) A weed springing = sae there is a garden. 
