Children (35 direct children, 77 direct and indirect children):
Mesa verde cactus
Mesa verde fishhook cactus
Sclerocactus papyracanthus
Paperspine fishhook cactus
Sclerocactus wrightiae
Wrights fishhook cactus
Sclerocactus polyancistrus
Redspined fishhook cactus
Sclerocactus pubispinus
(tree size 1)
Great basin fishhook cactus
Sclerocactus glaucus
(tree size 2)
Colorado hookless cactus
Sclerocactus spinosior
(tree size 4)
Desert valley fishhook cactus
Sclerocactus brevihamatus
(tree size 2)
Shorthook fishhook cactus
Sclerocactus uncinatus
(tree size 3)
Chihuahuan fishhook cactus
Sclerocactus nyensis
Nye county fish-hook cactus
Sclerocactus parviflorus
(tree size 10)
Small-flower fishhook cactus
Sclerocactus scheeri
(tree size 1)
Tobusch fishhook cactus
Sclerocactus whipplei
(tree size 9)
Whipple's fishhook cactus
Sclerocactus wetlandicus
(tree size 2)
Uinta basin hookless cactus
Sclerocactus sileri
Siler's pincushion cactus
Sclerocactus brevispinus
Pariette cactus
Sclerocactus blainei
Sclerocactus terrae-canyonae
Sclerocactus havasupaiensis
(tree size 1)
Sclerocactus cloverae
(tree size 1)
Sclerocactus schlesseri
Sclerocactus sect. coloradoa
Sclerocactus sect. parviflori
Sclerocactus sect. sclerocactus
Sclerocactus johnsonii
(tree size 3)
Johnson's fishhook cactus
Sclerocactus intertextus
(tree size 2)
Sclerocactus unguispinus
(tree size 1)
Sclerocactus erectocentrus
Sclerocactus mariposensis
Sclerocactus franklinii
Sclerocactus warnockii
Sclerocactus sect. mesae-verdae
Sclerocactus sect. normanbokea
Sclerocactus intermedius
Sclerocactus contortus