Psychotria lanceolata, v, 290.
Pteris alabamensis, xlv, 177.
Pycnanthemi, conspectus of, xlii, 44.
Pycnanthemum albescens, xlii, 45.
— aristatum, xlii, 44.
— clinopodioides, xlii, 45.
— dubium, xlii, 45.
— hyssopifolium, xlii, 44.
— incanum, xlii, 45.
— lanceolatum, xlii, 46.