(>4 Bulletin 1, Biological Society of Washington, 1918. 



SELECTED SPECIES OF THE WASHINGTON FLORA 

 APPARENTLY ARE RESTRICTED TO THE 

 PIEDMONT PLATEAU. 



THAT 



Osmunda claytoniana 

 Pteretis nodulosa 

 Woodsia obtusa 

 Filix bulblfera 

 Dryopteris clintoniana 

 goldiana 

 hexagonoptera 

 marginal is 

 Camptosorus rhizophyllus 

 Asplenium pinnatifldum 

 tricbomanes 

 montanum 

 Athyrium thelypteroides 

 Pellaea atropurpurea (in natural 



situations) 

 Cbeilanthes lanosa 

 Selaginella rupestris 

 Isoetes engelmannii valida 

 Pinus strobus 



pungens 

 Tsuga canadensis 

 Panicum gattingeri 

 linearifolium 

 xalapense 

 annulum 

 latifolium 

 Muhlenbergia sobolifera 



schreberi 

 Brachyelytrum erectum 

 Eragrostis hypnoides 

 caplllarls 

 frankii 

 Melica mutica 

 Uniola latifolia 

 Festuca obtusa 

 Bromus purgans incanus 

 Elymus striatus 

 Hystrix hystrix 

 Hemicarpha micrantba 

 Fimbristylis baldwiniana 

 Scirpus planifolius 

 lineatus 



Carex nigro-marginata 

 jamesii 

 frankii 

 davisi 

 albursina 

 hirtifolia 

 careyana 

 platyphylla 

 oligocarpa 

 bitcbcockiana 

 torta 

 Arisaema dracontium 

 Commelina erecta 

 Melanthium latifolium 

 Allium tricoccum 



cernuum 

 Erythronium albidum 

 Lilium philadelphicum 

 Vagnera stellata 

 Trillium sessile 



grandiflorum 

 Iris cristata 

 Sisyrinchium intermedium 



mucronatum 

 Cypripedium parviflorum 

 Blephariglottis peramoena 

 Triphora triantho/phora 

 Liparis loesellii 

 Corallorhiza wisteriana 

 Betula lenta 

 Populus virginlana 

 Quercus acuminata 



leana 

 Hicoria cordiformis 

 microcarpa 

 ovata 

 Ostrya virginiana 

 Celtis crassifolia 

 Cerastium oblongifolium 

 Silene alba 

 Delphinium tricorne 

 Aconitum uncinatum 

 Anemone virginiana 



