Petioles and petiolules do not show twisting or vertical disposition . . . . . Oldest leaves not most chlorotic. Chlorosis, when present, appears as interveinal mottling on recently matured leaves. Small black necrotic dots appear on young or recently mature leaves . . . . . Old or recently matured leaves may show interveinal chlorosis.
Leaflets sometimes show small black interveinal necrotic dots . . . . .
Neither tip nor marginal necrosis is present on older leaves until the entire plant is severly affected. Some tip necrosis is often present on the youngest leaves. Younger leaflets often show small black interveinal necrotic dots, especially adjacent to the main veins. Necrosis is usually confined to interveinal tissues adjacent to main veins . . . . . Interveinal chlorosis is not present . . . . .