Arbutus uva-ursi, iv, 62.
Argemone georgiana, xxv, 75.
Arum polymorphun, xlv, 173.
Asarsum, characters of the genus, xlii, 18.
Asclepias, amæna, xi, 173.
— incarnata, xi, 173.
— lanceolata, i, 252.f
— longifolia, xi, 173.
— obtusifolia, xi, 173.
— quadrifolia, xi, 172.