Alan Cressler:
Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea, Hawaii County, Hawaii 2
Alan Cressler:
Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea, Mailuku Silversword Sanctuary, Mauna Kea Forest Reserve, North Hilo District, Hawaii County, Hawaii 1
Alan Cressler:
Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea, Mailuku Silversword Sanctuary, Mauna Kea Forest Reserve, North Hilo District, Hawaii County, Hawaii 3
Alan Cressler:
Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea, Mailuku Silversword Sanctuary, Mauna Kea Forest Reserve, North Hilo District, Hawaii County, Hawaii 4
Alan Cressler:
Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea, Mailuku Silversword Sanctuary, Mauna Kea Forest Reserve, North Hilo District, Hawaii County, Hawaii 5
Alan Cressler:
Asarum (Hexastylis) rosei (right) and Galax urceolata (left), North Carolina 1
Alan Cressler:
Asarum (Hexastylis) rosei, North Carolina 6
Alan Cressler:
Asarum canadense, Buffalo Mountain, Washington County, Tennessee 1
Alan Cressler:
Asclepias humistrata, Wayne County, Georgia 2
Alan Cressler:
Asclepias incarnata ssp. incarnata, Murray County, Georgia 1
Alan Cressler:
Asclepias viridiflora, Glade 6, Chickamauga And Chattanooga National Military Park, Catoosa County, Georgia 3
Alan Cressler:
Baptisia arachnifera, Wayne County, Georgia 1
Alan Cressler:
Baptisia arachnifera, Wayne County, Georgia 2
Alan Cressler:
Baptisia arachnifera, Wayne County, Georgia 3
Alan Cressler:
Baptisia arachnifera, Wayne County, Georgia 4
Alan Cressler:
Berteroa incana, Glacier Basin, Rocky Mountain National Park, Larimer County, Colorado 4
Alan Cressler:
Campanula aparinoides, mountain bog, Union County, Georgia 2
Alan Cressler:
Carex baltzellii, Kolomoki Mounds Historic Park, Early County, Georgia 1
Alan Cressler:
Carex torta, Betty Creek, Hambidge Center, Rabun County, Georgia 1
Alan Cressler:
Ceratiola ericoides, Ohoopee Dunes Wildlife Management Area, Covena Tract, Emanuel County, Georgia 1
Alan Cressler:
Ceratiola ericoides, Ohoopee Dunes Wildlife Management Area, Covena Tract, Emanuel County, Georgia 2
Alan Cressler:
Chaetopappa effusa, Hale Hollow Creek Canyon, Lost Maples State Natural Area, Bandera County, Texas 2
Alan Cressler:
Chamaecyparis thyoides, Whitewater Creek, Taylor County, Georgia 1
Alan Cressler:
Chamaecyparis thyoides, Whitewater Creek, Taylor County, Georgia 2
Alan Cressler:
Chamaecyparis thyoides, Whitewater Creek, Taylor County, Georgia 3
Alan Cressler:
Chrysopsis gossypina, Gulf Islands National Seashore, Santa Rosa Island, Fort Pickens Area, Escambia County, Florida 1
Alan Cressler:
Chrysosplenium americanum, Cohutta Mountains, Murray County, Georgia 1
Alan Cressler:
Chrysosplenium americanum, Cohutta Mountains, Murray County, Georgia 2
Alan Cressler:
Chrysosplenium americanum, Murray County, Georgia 1
Alan Cressler:
Cicuta maculata, Hannahatchee Wildlife Management Area, Stewart County, Georgia 1
