By Gray, Asa, 1810-1888 . Genre Religion and science / Natural history . Names animals / life / animal / plants / idea and 299 more

By Gray, Asa, 1810-1888 / Sprague, Isaac, 1811-1895 . Genre Botany / United States . Names calyx / fruit / flower / flowers / leaves and 4131 more

By Gray, Asa, 1810-1888 . Genre Plants / North America . Names calyx / corolla / leaves / flowers / california and 20969 more

By Gray, Asa, 1810-1888 . Genre Botany / Botany / United States . Names leaves / flowers / calyx / fruit / corolla and 18983 more

By Gray, Asa, 1810-1888 / Bailey, L. H. (Liberty Hyde), 1858-1954 / Gray, Asa,, 1810-1888 . Genre n-use-- / Botany / United States . Names leaves / flowers / calyx / fruit / flower and 16799 more

By Gray, Asa, 1810-1888 . Genre Botany . Names leaves / plants / flower / flowers / called and 2866 more

By Gray, Asa, 1810-1888 / Robinson, Benjamin Lincoln, 1864- / Fernald, Merritt Lyndon, 1873-1950 . Genre n-us--- / Botany / United States . Names leaves / flowers / calyx / fruit / none and 31844 more

By Gray, Asa, 1810-1888 / Gray, Jane (Loring) / Gray, Asa, 1810-1888 . Genre n-us--- / Gray, Asa1810-1888 / Biography / Botanists / United States and 1 more . Names plants / town / called / american / none and 1481 more

By Gray, Asa, 1810-1888 / Gray, Jane (Loring) / Gray, Asa, 1810-1888 . Genre n-us--- / Gray, Asa1810-1888 / Biography / Botanists / United States and 1 more . Names america / plants / american / paris / life and 2184 more

By Darwin, Charles, 1809-1882 / Gray, Asa, 1810-1888 . Genre Variation (Biology) / Domestic animals / Plants, Cultivated . Names plants / rock / flowers / fruit / animals and 4099 more