518 
Part IV. Chapter 3. 
of the prairies. — Of the thirty three species of grasses which comprise 
the facies and the principal species of the prairies, according to POUND and 
CLEMENTS, Nebraska, Kansas and the Dakotas possess the entire number: 
the prairies of Saskatchewan, Assiniboia and Manitoba possess 30 species, the 
Red River country 29 species, and the southern prairies 31 species. Of 
140 species most important with respect to frequence, abundance or charac- 
teristics 83 are spread throughout the entire region, while 129 are found through- 
out the central and southern portions, and 9ı throughout the central and 
northern portions. The following plants are proper to the prairie formation: 
Acerates viridifllora Raf. var. 
Britton. 
> viridiflora var. linearis A. 
Gray. 
Agrostis hiemalis Walt. (= A. scabra 
Willd.). 
Allionia ovata Pursh. 
morpha canescens Pursh. 
Andropogon furcatus Muhl. 
scoparius Michx. 
Androsace occidentalis Pursh. 
Anemone caroliniana Walt. 
» cylindrica A. Gray. 
Antennaria campestris Rydb. 
Artemisia gnaphalodes Nutt. 
ER obtusifolia Michx. 
ayriaca. 1. (= 4A, 
ee 
» tuberosa L. 
verticillata L. 
.- multiflorus Ait. 
>»  oblongifolius Nutt. 
»  sericeus Vent. 
Astragalus crassicarpus Nutt. 
caryocarpus Ker.). 
Baptisia bracteata El. (= B. leuco- 
phaea Nutt.). 
Bouteloua curtipendula Michx. ( 
racemosa Lag.). 
Brauneria pallida Nutt. 
Carex Meadii Dewey. 
»  pennsylvanica Lam. 
Ceanothus ovatus Desf. 
Comandra umbellata L. 
Coreopsis palmata Nutt, 
Delphinium carolinianum Walt. (=D. 
azureum Michx.). 
Eatonia obtusata Michx. 
Eragrostis pectinacea Michx. 
Erigeron ramosus Walt, 
Euphorbia corollata L. 
Gentiana puberula Michx. 
Helianthus Maximiliani Schrad. 
» scaberrimus EI. (= H. ri- 
gidus Desf.). 
Hieracium longipilum Torr. 
Koeleria cristata L. 
Kuhnistera candida Willd. 
» purpurea Vent. 
Kuhnia eupatorioides L. 
Lespedeza capitata Michx. 
Liatris (Lacinaria) scariosa L. 
» » squarrosa L. 
Linum sulcatum Riddell. 
Lithospermum canescens Michx. 
> angustifolium Michx. 
(= L. linearifolium 
Goldie). 
Desmodium (Meibomia) illinoensis A. 
ray. 
Mesadenia (Cacalia) tuberosa Nutt. 
Prenanthes (Nabalus) asper Michx. 
Onosmodium molle Michx. 
Oxalis violacea L. 
Panicum depauperatum Muhl. 
> pubescens Lam. 
» Scribnerianum Nash. 
Phlox pilosa L. 
