Complete list of species
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| scientific name | common name(s) | image gallery |
| Grindelia lanceolata var. texana | Texan Gumweed | |
| Grindelia microcephala | Littlehead Gumweed Gumweed | |
| Grindelia nana | Idaho Gumweed | |
| Grindelia nana var. integerrima | Idaho Gumweed Idaho Resinweed | |
| Grindelia nana var. nana | Idaho Gumweed Idaho Resinweed | |
| Grindelia nuda | Curlytop Gumweed | |
| Grindelia nuda var. aphanactis | Curlytop Gumweed | |
| Grindelia nuda var. nuda | Curlytop Gumweed | |
| Grindelia oolepis | Plains Gumweed | |
| Grindelia oxylepis | Mexican Gumweed | |
| Grindelia papposa | Spanish Gold Clasping-leaved Haplopappus Saw-leaf Daisy | |
| Grindelia pusilla | Little Gumweed | |
| Grindelia revoluta | Rolled Gumweed | |
| Grindelia scabra | Rough Gumweed | |
| Grindelia squarrosa | Curlycup Gumweed | |
| Grindelia squarrosa var. quasiperennis | Curlycup Gumweed | |
| Grindelia squarrosa var. serrulata | Curlycup Gumweed | |
| Grindelia squarrosa var. squarrosa | Curlycup Gumweed | |
| Grindelia stricta | Oregon Gumweed | |
| Grindelia stricta var. angustifolia | Oregon Gumweed Marsh Gumplant | |
| Grindelia stricta var. platyphylla | Oregon Gumweed | |
| Grindelia stricta var. stricta | Coastal Gum Plant Coastal Gumplant Oregon Gumweed | |
| Grindelia subalpina | Subalpine Gumweed | |
| Grindelia subalpina var. erecta | Subalpine Gumweed | |
| Grindelia subalpina var. subalpina | Subalpine Gumweed | |
| Grusonia aggeria | Big Bend Pricklypear | |
| Grusonia clavata | Club Cholla Club-cholla | |
| Grusonia emoryi | Devil Cholla Devil Club Cholla Devil Club-cholla | |
| Grusonia grahamii | Graham's Pricklypear Graham Dog Cactus Graham's Club Cholla | |
| Grusonia kunzei | Devil's Cholla Kunze Club Cholla Kunze’s Club-cholla | |
| Grusonia parishii | Matted Cholla Devil Cholla | |
| Grusonia pulchella | Dwarf Cholla Sagebrush Cholla Sand Club-cholla | |
| Grusonia schottii | Dog Cholla Big Bend Pricklypear | |
| Guaiacum angustifolium | Texas Lignum-vitae Soapbush Guayacan | |
| Guaiacum sanctum | Holywood Holywood Lignum-vitae | |
| Guapira discolor | Beef-wood Beeftree Blolly Pigeon-wood Pork-wood | |
| Guapira globosa | Roundleaf Blolly | |
| Guapira obtusata | Broadleaf Blolly Corcho Prieto | |
| Guardiola platyphylla | Apache Plant | |
| Guettarda elliptica | Hammock Velvetseed Elliptic-leaf Velvetseed Everglades Velvetseed | |
| Guettarda scabra | Wild Guave Rough Velvetseed Roughleaf Velvetseed | |
| Guilleminea densa | Small Matweed | |
| Guilleminea densa var. aggregata | Small Matweed | |
| Guillenia flavescens | Yellow California Mustard Yellow Mustard | |
| Guillenia lasiophylla | California Mustard Coast Range Wild Cabbage Hairyleaf Wildcabbage | |
| Gunnera kauaiensis | 'Ape'ape 'Ape Haha | |
| Gunnera petaloidea | Haha 'Ape'ape 'Ape | |
| Gutierrezia arizonica | Arizona Snakeweed | |
| Gutierrezia californica | California Matchweed San Joaquin Snakeweed | |
| Gutierrezia elegans | Lone Mesa Snakeweed | |
| scientific name | common name(s) | image gallery |
