392 Part IV. Chapter 2. 
Astragalus labradoricus Hook. (= A. Echinodorus subulatus Engelm. (= E. 
alpinus L.). tenellus Buchen.). 
Dryas octopetala L. Alisma tenellum Mart. 
» Drummondi Rich. Iris tridentata Pursh. 
Rubus arcticus L. Eriophorum capitatum Host (=E. 
Ribes oxyacanthoides L. Scheuchzeri Hoppe). 
Saxifraga nivalis L. Eriophorum russeolum Fries. 
Sium latifolium Bigel. (= S. cicutae- | Carex ovata Rudge (= C. atratiformis 
Cornus suecica L. [folium Gmel.). Britton). 
Rumex acetosa L. » bicolor All. 
Elaeagnus argentea Pursh. Elymus arenarius L. 
Salix vestita Pursh. Asplenium viride Huds. 
The surface of the Laurentide country is of a mamillated character, its 
hills and peaks having been worn down by glacial action. The intervening 
depressions hold numerous small lakes and ponds. The more prominent ele- 
vations are covered with evergreens (Coniferous Forest Formation) chiefly 
Pinus strobus, P. resinosa, Picea alba. The sphagnum bogs (Bog Formation) 
consist of Sphagnum cymbifolium, S. acutifolium, S. cuspidatum surrounded by 
Larix americana, and on the rim of the depression with great regularity a 
circumarea of 7huja occidentalis associated most commonly with Zedum latı- 
Jolium, Alnus incana, Rhamnus alnifolius, Cornus stolonifera. Encircling the latter 
circumarea and bounding the depression occur Frarinus sambucifolia, Ulmus 
americana, Betula lutea, Acer rubrum, A. spicatum, Ribes rubrum, R.lacustre, 
R. hurtellum, and R. nigrum. The plants in the list below may be cited as 
truly Laurentian. 
Ribes prostratum L’Her. 
Aralia hispida Vent. 
Carex Houghtonii Torr. 
»  lenticularis Michx. 
Spiraea tomentosa L. Asplenium ebeneum Ait. (= A. platy- 
Polygonum cilinode Michx. neuron Oakes). 
Kalmia angustifolia L. Woodsia ilvensis R. Br. 
Pinus Banksiana Lamb. (—P.divaricata | Trichostomum (Leptotrichum) glauces- 
« rigida Mill. [Ait.). cens Hedw. 
Isoetes riparia Engelm. Grimmia Olneyi Sulliv. 
Sphagnum squarrosum Pers. Hedwigia ciliata Eh rh. 
Dicranum fulvum Hook. Bryum crudum Schreb. (— Webera 
> spurium Hedw. cruda Schimp.). 
sn ii Vaseyi Robbins Fontinalis antipyretica L. var. gigantea 
spirillus Tuck. Sulli 
Extension and Kinds of Bere Pirwmeline: The whole face of the lake 
country north of Lake Superior is covered with a dense forest which is cha- 
1) MAcovn, JoHN; "The rarer Plants of Ontario, Transactions and Proceedings of the Botanical 
Society of Edinburgh XII: 300 
