Floral Resources and Nesting Requirements of the Ground-Nesting Social Bee, Lasioglossum malachurum (Hymenoptera: Halictidae), in a Mediterranean Semiagricultural Landscape

Table 1

List of families and genera collected in the environment around L. malachurum nesting sites, and relative use of plant genera/pollen types (richness of used taxon/richness in the environment${}^{*}$100) in the families where genera/type-level identification of pollen from bees was possible. Genera/types in bold were found in bee pollen loads. Only taxa represented in pollen loads by more than 1% were considered.

Site A	Site B	Plant family	Collected by bees at site A	Collected by bees at site B	Plant genera in the environment at site A	Plant genera in the environment at site B	Use by bees at site A	Use by bees at site B
X	—	Apocynaceae	no	no	Vinca	—	—	—
X	—	Aristolochiaceae	no	no	Aristolochia	—	—	—
X	—	Boraginaceae	no	no	Echium, Myosotis	—	—	—
X	—	Campanulaceae	no	no	Campanula	—	—	—
X	X	Caryophyllaceae	no	yes	Petrorhagia, Silene, Stellaria	—	—	—
—	X	Chenopodiaceae	no	yes	—	not determined	—	—
X	X	Cistaceae	yes	yes	Cistus, Helianthenum	Cistus	50%	—
X	X	Compositae	yes	yes	Anthemis, Bellis, Chicorium, Cirsum, Coleostephus, Crepis, Evax, Filago, Hieracium, Inula, Pallenis	Anthemis, Bellis, Centaurea, Hieracium, Pallenis, Picris, Doronico, Aster, Senecio, Sonchus	18.2%	50%
X	X	Convolvulaceae	no	yes	Convolvulus	Convolvulus, Calystegia	—	50%
X	X	Cruciferae	yes	yes	Arabis, Capsella, Rapistrum, Sysimbrium	Arabis, Brassica, Capsella	—	—
X	X	Dipsacaceae	no	yes	Knantia	Scabiosa	—	—
X	X	Euphorbiaceae	yes	yes	Euphorbia	Euphorbia	100%	—
—	X	Fagaceae	no	yes	—	Quercus	—	—
X	X	Geraniaceae	no	no	Geranium	Geranium	—	—
X	X	Graminaceae	yes	yes	Alopecurus	not determined	—	—
X	X	Guttiferae	no	yes	Hypericum	Hypericum	—	—
X	X	Labiatae	no	no	Lamium, Marrubium	Mentha, Stachys	—	—
X	X	Leguminosae	no	yes	Lathyrus, Spartium, Trifolium, Vicia	Medicago, Ononis, Scorpiurus, Trifolium, Vicia	—	—
X	X	Liliaceae	no	yes	Allium	Ornithogalum	—	—
X	X	Malvaceae	no	no	Malva	Malva	—	—
X	X	Papaveraceae	yes	yes	Papaver	Papaver, Fumaria	100%	—
X	X	Pinaceae	yes	yes	Pinus	Pinus	—	—
X	X	Plantaginaceae	no	yes	Plantago	Plantago	—	—
—	X	Polygonaceae	no	yes	—	Polygonum	—	100%
X	X	Primulaceae	no	no	Anagallis	Anagallis	—	—
X	X	Ranunculaceae	no	yes	Anemone, Clematis	Anemone, Clematis, Migella, Ranunculus	—	—
X	X	Rhamnaceae	no	yes	Paliurus	Rhamnus	—	—
X	X	Rosaceae	yes	yes	Prunus, Rosa, Sanguisorbia	Rosa	—	—
X	X	Rubiaceae	no	no	Galium	Galium	—	—
—	X	Scrophulariaceae	no	no	—	Veronica	—	—
X	X	Umbelliferae	no	yes	Daucus, Pimpinella, Ridolfia	Daucus, Peucedanum	—	—
—	X	Verbanaceae	no	yes	—	Verbena	—	—