Natural History of District of Columbia — McAtee 107 



the live-forever, Sedum telephioides, Phlox subulata, and 

 prickly pear. The rock pools harbor distinctive aquatics 

 among which are Isoetes engelmanni valida, Naias gracillima 

 and Callitriche autumnalis. A fuller list of the most inter- 

 esting plants follows : 



CHARACTERISTIC PLANTS OF THE GREAT FALLS REGION 

 WITH NOTES ON THE DISTRIBUTIONAL RELATION- 

 SHIPS OF SOME OF THEM. 



Asplenium montanum 



Piedmont n 

 Cheilanthes lanosa 



Piedmont 

 Polypodium polypodioides 



Coastal 

 Selaginella rupestris 



Piedmont 

 Isoetes engelmanni valida 



Piedmont 

 Typha angustifolia 



Coastal 

 Potamogeton diversifolius 

 Naias gracillima 

 Piedmont 

 Muhlenbergia capillaris filipes 



Coastal 

 Stipa avenacea 

 Danthonia compressa 



Piedmont 

 Gymnopogon ambiguus 



Coastal 

 Fimbristylis baldwiniana 



Coastal 

 Rhynchospora corniculata 



Coastal 

 Carex decomposita 



davisi 

 Ibidium plantagineum 



Piedmont 

 Salix ward! 



Coastal 

 Quercus michauxii 



Coastal 

 Paronychia dichotoma 

 Piedmont 



Brasenia schreberi 

 Trautvetteria carolinensis 



Piedmont 

 Neobeckia aquatica 

 Sedum telephioides 



Piedmont 

 Rubus odoratus 



Piedmont 

 Prunus pumila 



Piedmont 

 Lathyrus venosus 



Piedmont 

 Polygala ambigua 



Piedmont 

 polygama 

 Callitriche sntumnalis 

 Rhus aromatica 



Piedmont 

 Ilex decidua 



Coastal 

 Vitis rupestris 



Piedmont 

 Napaea dioica 



Piedmont 

 Viola pallens 



Piedmont 

 Opuntia opuntia 



Coastal 

 Steironema hybridum 

 Gratiola virginiana 

 Viburnum pubescens 



Piedmont 

 Eupatorium semiserratum 



Coastal 

 Solidago racemosa 



Piedmont 



