Peaches growing on an almond tree, ii, 363.
Penstemon Nuttalli, xiv, 120.
Petalostemon roseum, v, 298.
— villosum, iv, 66.
Peucedanum ternatum, xxviii, 165.
Phacelia brevistylis, xlv, 172.
— fimbriata, xlv, 171.
— Purshii, xlv, 171.
— pusilla, xlv, 172.
Philadelphus hirsutus, xlix, 130.