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O. A. STEVENS 
Erigeron lonchophyllus Corallorhiza multiflora 
Achillea multiflora Cinna latifolia 
Senecio eremophilus Avena Torreyi ' - 
It is noteworthy that most of these are plants of wide distribution in 
North America except Oxytropis, Avena, and the three composites, which 
are western. Of the foregoing, Anemone, Pyrola, Avena, and Erigeron are 
recorded from Devil's Lake, the last-named only from there. Another 
touch of Canadian Zone plants is evident in deep ravines at Kathryn where 
Pyrola secunda, Corylus rostrata, and Circaea alpina have been found. Oxy- 
tropis splendens occurs throughout the northern part of the state, but not 
over 50 miles southward so far as known. 
Upper Austral Species 
This zone reaches the borders of the state at three points, viz.: the 
valley of the Missouri River on the south and northwest and that of the 
Little Missouri on the southwest. Pentstemon grandiflorus is common 
along the Missouri River at least as far as Mandan and up the Cannon 
Ball for some distance; Talinum parviflorum, Eriogynum annuum, Specularia 
perfoliata, Erigeron caespitosus, Leptilon divaricatum, Munroa squarrosa, 
Diplachne fascicularis, and Pellaea atropurpurea are known only from the 
lower Missouri; Atriplex confertifolia, Sarcohutus vermiculatus, Ahronia 
micrantha, and Astragalus gracilis (Marmarth, Stevens in 1918), only from 
the Little Missouri. Clematis ligusticifolia, Psoralea lanceolata, Aster 
pauciflorus, and Oryzopsis micrantha are known from the upper Missouri 
as well. (For further notes on austral species see under "Comparison with 
the Flora of New Mexico.") 
A considerable representation of austral forms is found also in the 
southeastern part of the state where the Sheyenne River turns northward. 
From here only is known Bouteloua hirsuta; other noteworthy species are: 
Pentstemon grandiflorus, Mimulus Geyeri, Bacopa rotundifolia, Verbena 
stricta, Lythrum alatum, and Cenchrus tribuloides. To this list Mr. Reynold 
Shunk added in 191 7: Euonymus atropurpureus, Sicyos angulatus, and 
Cyperus diandrus. 
Sand Dune Species 
Two small areas of drifting sand occur in the state, one at the locality 
last mentioned, the other near Towner. From these only are recorded: 
Euphorbia Geyeri, Petalostemon villosum, Lygodesmia rostrata, Cyperus 
Schweinitzii, and Redfleldia flexuosa. From near Towner we have Cycloloma 
atriplicifolium and Andropogon Hallii which do not elsewhere in the state 
occur so far north. 
Records of Special Interest 
At Fargo there is a slight intermingling of northern and southern species. 
Lappula americana, which occurs there, must reach nearly its southeastern 
