20 FERNS AND 



PRUNUS, Town. plum. 



americana, Marsh, meadow plum. 



PSORALEA, L. scurvey pea. 

 onobrychis, Nutt. 



PTELEA, L. wafer shrub, 

 trifoliata, L. 



PTERIS, L. bracken; brake. 



aquilina, L. common brake. 



PYCNANTHEMUM, Mickx. mountainmint. 

 pilosum, Nult. 



PYRUS, L. 



coronaria, L. crab-apple. 



Q. 



QUERCUS, L. oaks. 



imbricaria, Mickx. laurel oak ; shingle oak. 



coccinea, Wang, scarlet oak. 



leana, Nult. Lea's oak. 



palustris, Du'Roy. pin oak ; Spanish swamp oak. 



castanea, Willi, chestnut oak ; yellow oak. 



bicolor, Willi, white swamp oak. 



rubra, L. red oak. 



alba, L. white oak. 



macrocarpa, Michx. overcup oak, burr oak. 



QUERIA, L. forked chickweed. 

 canadensis, L. 



R. 



RANUNCULUS, L. crowfoot, 

 abortivus, L. 



repens, L. creeping crowfoot, 

 aquatilis, L. white-water crowfoot. 



RHAMNUS, L. buckthorn, 

 lanceolatus, Pursh. 



RHEXIA, L. deer grass; meadow beauty, 

 virginica, L. 



Note on Quercus Leana. — I believe this oak to be a good 

 species. The late Mr. T. G. Lea and myself knew four trees 

 of the same, within from two to ten miles of Cincinnati. I 

 have raised several young ones from the acorns, which always 

 retain their character. J. C. 



