| 1990 | | Geb/SU, F: 18,5x25 cm, 432 S, 5 Farbfotos, 13 s/w-Fotos. | WG: Buch | | Among the important papers collected in this volume is Robert M. Hamilton's "Flowering Months of Orchid Species Under Cultivation," which records the number ofincidences of flowering in each month for an enormous number of species and varieties over a 150-year period. | [E] | |