150 
IOWA ACADEMY OF SCIENCE 
The second group, plants of ordinary mesophytic conditions, 
includes the following: 
PMeum pratense 
Sporobolus sp. 
Agrostis alha 
Holcus lanatiis 
Descliampsia elongata 
Poa pratensis 
Poa compressa 
Agropyron tenerum 
Hordeum jubaium 
Carex sp. 
J uncus balticus 
J uncus orthophyllus 
J uncus regelii 
Juncus hadius 
Hookera Jiyacinthina 
Iris missouriensis 
Sisyrinchium helium 
Sisyrinchium idahoense 
Ihidium romanzoffianum 
Betula sp. 
Alnus tenuifoUa 
Bihes inerme (?) 
■ f 
Spiraea douglasii 
Bubus macropet alus 
Argentina anserina concolor 
Amelanchier sp. 
Lupinus polyphyllus 
Melilotus albus 
Trifolium longipes 
Sidalcea oregana 
Epilobium adenocaidon 
Taraxia heterantha taraxacifolia 
Pyrola incarnata 
Gentiana acuta 
Gentiana affinis 
Gentiana simplex 
Scutellaria galericulata 
Castilleja miniata 
Orthocarpus hispidus 
Galium boreale 
Lonicera coeridea 
Agoseris glauca 
Erigeron armeriaefolius 
Aster campestris 
Aster eatoni 
Alsine sp. 
Banunculus flammula repens 
Banunculus eiseni 
Banunculus oreganus macounii Aster occidentalis 
Boripa obtusa Aster sp. 
Arnica sp. 
Of these fifty-four species of mesophytes, nineteen are of very 
wide distribution and are mostly Transition forms; seven others 
are of general occurrence in Oregon, being found also on the 
west side of the Cascades/’'' Not over half of the total number 
are Arid Transition. 
The third group, made up of species that grow mostly in 
moderately dry situations, comprises the following: 
Pinus ponderosa Gayophytum lasiospermum 
Pinus contorta Gayophytum diffusum 
Abies nobilis Gayophytum^ ramosissimum 
♦This expression, as used here and elsewhere, is meant to include mainly 
the Willamette valley, and not the Klamath Mountain region. 
