m ROGENOUS PLANTS. G21 



St. Peter's. Panioum pauciflorum, (Ell.) Panicum virgatum, (L.) Cenchrus ochinatus, (L.) Burr 

 grass. Sandy soil. Iowa. Andropogon furcatus, (Muhl.) Dry prairies. Common. Sorghum 

 nutans, (Gray.) Dry soil. Iowa and Minnesota. 



.EROGENS. 



EQTJISETACE.a:. — Equisctnm arvcnse, (L.) April. Damp places. Common. Equisetum sylvaticum, 

 I,.' May. St. Peter's. Equisetum limosum, (L.) Shallow water. St. Peter's and St. Croix. Equi- 

 setum hyemale, | L.) Scouring rush. Very abundant, and rank, on the wooded banks of the St. Peter's, 

 above high-water mark. Equisetum variegatum, (Schleieher.) Margins of Montreal lliver, Lake Supe- 

 rior. Equisetum scirpoides, (Michx.) Deep woods. St. Croix. 



Filices. — Polypodium vulgare, (L.) Crevices of exposed rocks of every character. St. Peter's and 

 St. Croix. Polypodium Phcgopteris, (L.) Damp woods. St. Croix. Polypodium Dryopterus, (L.) 

 Damp woods, under the shade of evergreens. St. Croix and Lake Superior. Struthiopteris Gcrmanica, 

 (Willd.) Alluvial soil, exceedingly rank on the bottoms of the Lower St. Peter's. Allosorus gracilis, 

 Presl. ) Shaded rocks, Davenport, Iowa, Blue Earth River, head of Lake St. Croix. Pteris Aquilina, 

 ( L.) Common brake. Dry soil. Pteris atropurpurea, (L.) Attached principally to the Magnesian 

 Limestones, Upper and Lower. Adiantum pedatum, (L.) Maiden-hair. Common. Camptosorus rhi- 

 zophyllus, (Link.) Walking fern. Shaded and detached rocks, Falls of St. Croix. This fern sends forth 

 roots at the extremity of each prolonged leaf, producing a bunch similar to the parent root, whence its 

 name of walking-fern. Aspleuium thclypteroidcs, (Michx.) Shady woods. St. Croix. Asplenium 

 Filix-focmina, (R. Br.) Moist woods. Common. Cystopteris bulbifera, (Bernh.) Wet rocks. Blue 

 Earth River. Cystopteris fragilis, (Bern.) Shaded cliffs, St. Peter's and St. Croix. Woodsia obtusa, 

 (Torr.) Trap-rocks. Falls of St. Croix. Woodsia Uvcusis, (R. Br.) Exposed granite and quartzitc 

 rocks. Upper St. Peter's. Cheilanthes vestita, (Willd.) Rocks. Falls of St. Croix. Dryopteris Thelyp- 

 teris, (Gray.) Moist thickets. St. Croix. Dryopteris dilatata, (Gray.) Ravines. Falls of St. Croix. 

 Dryopteris cristata, (Gray.) Alder swamps. St. Croix. Aspidium fragrans, (Sw.) Trap-rocks. Falls 

 of St. Croix. Frond bipinnate, oblong-lanceolate ; pinna? oblong, slightly tapering to a very obtuse point, 

 regularly opposite and alternate, closely set on the stipe ; pinules oblong, obtuse, round-toothed. Sori 

 attached in two rows, corresponding to the lobes formed by the teeth, nearer the midrib than margins of 

 the pinna?, mostly covering the lower surface of the frond; stipe thickly clothed at its lower part with 

 brownish, unequal, ovate-acuminate scales. The whole fern beset with fragrant, glandular hairs. Grow- 

 ing in dense tufts, in the shaded crevices of trap-rocks, with the withered remains of several years' growth 

 still adhering. The fronds are of a deep green colour above, paler below, four to nine inches high. The 

 aroma is permanent and agreeable. I am informed by Dr. Torrey that this species has never before 

 been found within the limits of the United States, but has been obtained in British America and Kam- 

 chatka, where it is used for making tea. In the locality here specified, it is quite abundant, Polysti- 

 chum acrostichoides, (Schott.) Shady river-banks. Davenport, Iowa, and Fort Snelling. Onoclca 

 sensibilis, (L.) Moist, springy places. Common. Osmunda spectabilis, (Willd.) Swamps. Upper 

 St. Croix. Osmunda Claytoniana, (L.) Rich hillsides. St. Croix. Botrychium lunarioides, (Sw.) 

 Low grounds. St. Croix. Botrychium Virginicum, (Sw.) Rich woods. St. Peter's. 



Lycopodiace^e. — Lycopodium lucidulum, (Michx.) Deep woods. St. Croix. Lycopodium annotinum, 

 (L.) Woods. Lake Superior. Lycopodium clavatum, (L.) Upper St. Croix. Lycopodium dendroi- 

 deum, (Michx.) Upper St. Croix. Lycopodium complanatum, (L.) Pine barrens. St. Croix. Sela- 

 ginella rupestris, (Spring.) Exposed granite rocks, Upper St. Peter's; trap rocks, Falls of St. Croix. 



Musci.* — Sphagnum cymbifolium, (Ehrh.) Cranberry marshes. Dicranum scoparium, (Hedw.) 

 Lake Superior. Lcucobryum vulgare, (Hampc.) Trap rocks. St. Croix. Atrichum angustatum, 

 (Beauv.) Lake Superior. Bartramia pomiformis, (Hedw.) Montreal River. Mnium punctatum, 

 (Hedw.) Cedar swamps. St. Croix. Mnium affme, (Blandon.) Decaying logs. Lake Superior. 

 Bryum roseum, (Sehreb.) Lake Superior. Isotheruui minus, (Beauv.) Adhering to the trunk of the 

 Swamp Ash. Ilypnum populeum, (Hedw.) Red sand-rock. Lake Superior. Hypnum Schreberi, 



* Determined by William S. Sullivant, of Columbus, Ohio. 



