| Kingdom | Plantae | Plants, but not fungi, lichens, or algae |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Caryophyllidae | Cacti, many other succulents, carnivorous plants, and leadworts |
| Order | Caryophyllales | Includes cacti, carnations, amaranths, ice plants, and many carnivorous plants |
| Family | Polygonaceae | Knotweed or smartweed family |
| Genus | Eriogonum | From Greek erion, “wool,” and gonu, “joint or knee,” for the hairy or woolly joints in the stems of some of these species |
| Species | heermannii | |
| var. | sulcatum | |
Eriogonum heermannii Durand & Hilg. ssp. sulcatum (S. Watson) S. Stokes
Eriogonum sulcatum S. Watson
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