Origin and Habitat: Mesa County and Delta County, Colorado (Northwestern U.S.A., Northern America)
Type locality: South rim of Gunnison Valley, one or two miles east of Delta, Delta County, Colorado.
Altitude: Around 1400 metres above sea level.

• Sclerocactus franklinii J. W. Evans

• Sclerocactus glaucus (K.Schum.) L.D.Benson
• Echinocactus glaucus K.Schum.
• Echinocactus subglaucus Rydb.
• Echinocactus whipplei var. glaucus (K.Schum.) J.A.Purpus
• Ferocactus glaucus (K.Schum.) N.P.Taylor
• Pediocactus glaucus (K.Schum.) Arp
• Sclerocactus whipplei var. glaucus (K.Schum.) S.L.Welsh
• Sclerocactus brevispinus K.D.Heil & J.M.Porter
• Sclerocactus franklinii J. W. Evans
• Sclerocactus glaucus '' Debeque form '' (K.Schum.) L.D.Benson
• Sclerocactus glaucus subs. wetlandicus var. ilseae (Hochstätter) Hochstätter
• Pediocactus wetlandicus f. ilseae (Hochstätter) Halda
• Sclerocactus wetlandicus subs. ilseae (Hochstätter) Hochstätter
• Sclerocactus wetlandicus var. ilseae Hochstätter
• Sclerocactus whipplei var. ilseae (Hochstätter) S.L.Welsh

Description: Sclerocactus frankliniiSN|13861]]SN|19476]] is a morphological or local form of the variable Sclerocactus glaucusSN|19476]]SN|13861]]. It was described by Evans (1939) from close by the type locality of Sclerocactus glaucusSN|13861]]SN|13861]]. More recent observations of the extent of variation in Sclerocactus glaucusSN|13861]]SN|13861]] populations has led many authors to conclude that Sclerocactus frankliniiSN|13861]]SN|19476]] was a synonym of the bluegreen Sclerocactus glaucusSN|19476]]SN|13861]] because it is not sufficiently distinct to deserve its own formal status.

Bibliography: Major references and further lectures
1) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
2) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
3) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006
4) Urs Eggli, Leonard E. Newton: “Etymological Dictionary of Succulent Plant Names.” Birkhäuser 2004
5) Lyman David Benson “The Cacti of the United States and Canada” Stanford University Press, 1982
6) Butterworth, C. & Porter, J.M. 2013. Sclerocactus glaucus. In: IUCN 2013. "IUCN Red List of Threatened Species." Version 2013.2. <www.iucnredlist.org>. Downloaded on 04 December 2013.

Cultivation and Propagation: This plant is very rare in cultivation, it is difficult to grow on its own roots and to propagate. Mature individuals easily rot and die especially after planting. The seeds germinate with extreme difficulty and a low rate of success, seedlings do not do well either, and more die each year. Sclerocactus frankliniiSN|19476]]SN|19476]] is extremely xerophytic and adapted to very dry soils, but plants grafted on hardy stock (Opuntia humifusaSN|11629]]SN|11629]], Echinocereus triglochidiatusSN|10576]]SN|10576]] etc...) are relatively easy to grow and no special skill is required, they can stay in a non heated green house. (min tem -20°C) ... This interesting cactus, continues to be a particular prize among specialist collectors.
Propagation: Seeds are extremely difficult to germinate (only 2-3 percent of seeds germinate). The germination is really difficult and if some seedling finally sprout, as they start to grows they disappear one by one. Grafting is often used to speed growth rate and to create a back-up for plants in collection.