Catalpas, or Indian Bean Trees (_Catalpa_) June. MAGNOLIA, or SWEET BAY (_Magnolia glauca_) June LINDEN, or "LINN" (_Tilia americana_ and _T. heterophylla_) June. SOURWOOD, or SORREL TREE (_Oxydendrum arboreum_) June-July. _Oxeye Daisy_, or _Whiteweed_ (_Chrysanthemum leucanthemum_) June-July. ALFALFA (_Medicago saliva_) (West) June-Aug. MELILOT, BOKHARA, or SWEET CLOVER (_Melilotus alba_) June-Aug. Smooth Sumac (_Rhus glabra_) July. _Buttonbush_ (_Cephalanthus occidentalis_) July. CLEOME, or "ROCKY MOUNTAIN BEE PLANT" (_Cleome serrulata_ = _C. integrifolia_ of Gray's Manual) (West) July-Aug. Indian Corn (_Zea mays_) July-Aug. Cucumber. Melon. Squash. Pumpkin (_Cucumis_, _Citrullus_, and _Cucurbita_) July-Aug. _Knotweeds_ (_Polygonum_, especially _P. pennsylvanicum_ and _P. persicaria_) July-Sept. _Buckwheat_ (_Fagopyrum fagopyrum_ = _F. esculentum_ of Gray's Manual) Aug.-Sept. Wild Asters (_Aster_, especially HEATH-LIKE ASTER, _Aster ericoides_) Aug.-Oct. Thoroughwort, or Boneset (_Eupatorium perfoliatum_) Aug.-Oct. Bur Marigolds (_Bidens_, especially SPANISH NEEDLES, _Bidens bipinnata_) Aug.-Oct. Golden-rods (_Solidago_) Aug.-Oct. SOUTH. [Below 35° N.]