Ostrya, 345.
Osyris, 500.
Ouratea, 439.
Ouvirandra, 281.
Ovary, 3, 239, 250.
Ovule, 241, 242, 248.
Ovuliferous scale, 256, 257.
Oxalidaceæ, 416.
Oxalis, 416.
Ox-eye, 572.
Oxslip, 513.
Oxybaphus, 374.
Oxycoccus, 509, 510.
Oxyria, 360.
Oyster Mushroom, 171.
Padina, 76.
Pæonia, 379, 381.
Pæonieæ, 381.
Pæpalanthus, 309.
Palaquium, 511.
Palava, 429.
Paleæ, 209.
Pales, 288.
Palisander-wood, 529.
Paliurus, 448.
Palm, 275, 276, 297. Branching of, 298. Inflorescence of, 299.
Palm-oil, 301.
Palm-wax, 301.
A Handbook of Systematic Botany · The Wunder Library — complete classics, free to read, with narration.