PIPER 
FLORA OF 
Achlys triphylla. 
Allotropa virgata. 
Bikukulla formosa. 
Equisetum telmateia. 
Hemitomes congestum. 
Juncus covillei, 
Juncus orymeris. 
Lathyrus polyphyllus. 
Leptaxris menziesii. 
THE STATE 
Herbs. 
OF WASHINGTON, 5D 
Lupinus rivularis. 
Petasites speciosa. 
Poa howelilii. 
Polypodium occidentale. 
Struthiopteris spicant. 
Synthyris rotundifolia. 
Vancouveria hexandra. 
Vicia gigantea. 
Viola howellii. 
PLANTS THAT OCCUR IN THE MOISTER PARTS OF THE YELLOW PINE SUBAREA IN 
WESTERN IDAHO, BUT NOT IN THE HUMID TRANSITION OF WESTERN WASH- 
INGTON. 
Trees. 
Alnus tenuifolia. Larix occidentalis. 
Shrubs. 
Andromeda polifolia. Ribes irriguum. 
Berberis repens. Ribes viscosissimum. 
Chiogenes hispidula. Rubus strigosus. 
Cornus stolonifera. Sambucus melanocarpa. 
Lonicera conjugialis. Spiraea corymbosa. 
Rhamnus alnifotia. Spiraea menziesii. 
Ilerbs. 
Aconitum columbianum, 
Acorus calamus. 
Antennaria racemosa. 
Aralia nudicaulis, 
Arnica cordifolia. 
Aster laevis geyeri. 
Calochortus elegans. 
Carex geyeri. 
Carex nebraskensis. 
Clematis columbiana. 
Clematis hirsutissima. 
Coptis occidentalis. 
Frasera thyrsiflora. 
Gentiana oregana. 
Hydrophyllum capitatum. 
Ligusticum verticillatum. 
Mitella stauropetala. 
Pentstemon pinetorum. 
Petasites dentata, 
Ranunculus platyphyllus, 
Rudbeckia occidentalis. 
Sanicula marilandica. 
Sphaeralcea rivularis. 
Synthyris rubra. 
Therofon majus. 
Trillium petiolatum. 
HUMID TRANSITION PLANTS COMMON IN WESTERN WASHINGTON, BUT VERY RARE IN 
NORTHERN IDAHO. 
Trees. 
Cornus nuttallii. Occurs only in the valley of the middle fork of the Clearwater. 
