| Name |
Pronunciation |
Meaning |
| x fauriei | FAU-ree-eye | Hybrid named for L'Abbé Urbain Jean Faurie, 19th century renowned French missionary and botanist in Japan, Formosa and Korea |
| ritteriana | rit-ter-ee-AY-nuh | Named for Friedrich Ritter, early 20th century German cactus collector |
| cyperinus | sy-per-RY-nus | Resembles Cyperus (genus name for sedge) |
| eggersii | eg-ER-see-eye | Named for Henrik [Heinrich] Franz Alexander Baron von Eggers, 19th century Danish soldier and botanist in Ecuador |
| ensifera | en-SIF-er-uh | Sword-bearing |
| felgeri | fel-GER-ee | Named for Richard Felger, 21st century ecologist and author |
| durangensis | dur-rang-EN-sis | Of or from Durango, Mexico |
| durangense | dur-rang-EN-see | Of or from Durango, Mexico |
| x hybrida | hy-BRID-uh | A hybrid (cross between two plants resulting in a plant that differs in one or more genes from the parent plants); also shown without the cross ("x") preceding |
| x hybridum | hy-BRID-um | A hybrid (cross between two plants resulting in a plant that differs in one or more genes from the parent plants); also shown without the cross ("x") preceding |
| difformis | dif-FOR-mis | Differing shape |
| difforme | dif-FOR-me | Differing shape |
| subrotundifolia | sub-ro-tun-dih-FOH-lee-uh | Having somewhat rounded leaves |
