2023
Tricotyledonous cacti. Cactus and Succulent Journal 95(2): 170-173.
Cacti and yuccas of the Mojave River Watershed, including Cima Dome. Cactus Explorer 28: 41-64.
An odd Pediocactus knowltonii. Cactus and Succulent Journal 95(1): 6-9.
2022
Sotol (Dasylirion wheeleri) with curly leaves. Cactus and Succulent Journal 94(4): 170-171.
Opuntia winter colors. Cactus and Succulent Journal 94(3): 145-151.
Curved-spined Opuntias. Cactus and Succulent Journal 94(1): 25-27.
2021
Glandulicactus uncinatus var. wrightii at Anthony Gap. Cactus World 39(4): 261-270.
Echinomastus intertextus. Cactus and Succulent Journal 93(3): 197-203. [and cover photo]
2020
Opuntia basilaris var. heilii. Cactus World 38(4): 293-294.
Cylindropuntia leptocaulis x versicolor. Cactus Explorer 26: 80-82.
Coryphantha missouriensis with pectinate spines. Cactus World 38(3): 238.
Cylindropuntia ramosissima – the diamond cholla. Cactus World 38(3): 195-198.
Cuyama River cacti and succulents. Cactus and Succulent Journal 92(3): 189-207.
2019
Espostoa (Vatricania) guentheri have unusual cephalia or pseudocephalia. Haseltonia 26: 58-67.
Spineless Opuntia fragilis. Cactus and Succulent Journal 91(4): 287-288.
Echinocereus reichenbachii subsp. baileyi. Cactus and Succulent Journal 91(3): 177-181.
Opuntia tortispina. Cactus and Succulent Journal 91(1): 197-198.
2017
Rooting Sinningia leaves. Cactus World 35(3): 222.
Opuntia fragilis in the San Juan Islands. Cactus and Succulent Journal 89(4): 185-188.
Historical records of the range of Opuntia fragilis. Cactus Explorer 18: 41-42.
2015
Hesperoyucca whipplei. Cactus and Succulent Journal 87(6): 269-270.
2014
Strange stem architecture of pachycaulous morning glories. Cactus Explorer 13: 88-89.
Sex determination and sex change in cycads: tantalizing new hints. Cycad Newsletter 37(2-3): 29.
Sclerocactus parviflorus amongst the arches. Cactus and Succulent Journal 86(1): 37-39.
From the editor. Haseltonia 19: 2. [and cover photo of Fouquieria columnaris]
2013
Tephrocactus [Root Gorelick and Dan Mahr]. Cactus and Succulent Journal 85(6): 262-276.
Pterocactus. Cactus and Succulent Journal 85(5): 219-221.
What is natural history? CSEE Bulletin 14: 17-19.
2012
Euphorbia antiquorum and James Bond. Cactus and Succulent Journal 84(5): 244-246.
2011
Ferocactus hamatacanthus at Big Bend. Cactus World 29(4): 211-216.
Isotomous branching at the Zamia furfuracea cone axis. Cycad Newsletter 34(1): 29.
Cacti and agaves at the Grand Canyon’s South Rim. Cactus World 29(1): 27-30.
2010
Coryphantha echinus. Cactus World 28(2): 112.
2009
From the editor. Haseltonia 15: 2.
Meritorious micranthocerei. Cactus World 27(3): 183-184.
Columnar cacti of eastern Brazil. [Root Gorelick and Graham Charles].
Odd opuntias: Quiabentia and Brasiliopuntia. Cactus and Succulent Journal 81(3): 162.
After a few wet years in southern New Mexico. Cactus and Succulent Journal 81(1): 22-24. 33.
2008
Fouquieria burragei, a rare species from southern Baja. Cactus and Succulent Journal 80(4): 204-207.
From the editor. Haseltonia 14: 2.
Some crested cacti of Baja California. Cactus and Succulent Journal 80(1): 4-6.
2007
Cochemiea halei on peninsular Baja California Sur. Cactus and Succulent Journal 79(6): 274-275.
From the editor. Haseltonia 13: 2.
The Phoenix Desert Botanical Garden. Cactus World 25(3): 125-136 [plus cover photo]. (Please click here for high-quality page proofs of images)
Northernmost sightings of Bursera microphylla. Cactus and Succulent Journal 79(3): 109.
Corynopuntia marenae. Cactus and Succulent Journal 79(3): 139.
Achlorophyllous Mammillaria grahamii in Tempe, Arizona. Cactus and Succulent Journal 79(1): 4-6.
2006
From the editor. Haseltonia 12: 2.
Hiking New Mexico’s Achenbach Canyon. Cactus and Succulent Journal 78(3): 131-136.
Coryphantha recurvata at Sycamore Canyon. Cactus and Succulent Journal 78(3): 146-149.
Nopalea auberi. Cactus and Succulent Journal 78(3): 151.
Cylindropuntia molesta. Cactus and Succulent Journal 78(2): 95.
Opuntia basilaris. Cactus and Succulent Journal 78(2): 72.
2005
Opuntia quitensis. Cactus and Succulent Journal 77(5): 265.
Bursera microphylla and surrounding spring wildflowers. Cactus and Succulent Journal 77(4): 196-201.
Flower density on a Cleistocactus species. Cactus and Succulent Journal 77(3): 130-131.
Bursera microphylla in Phoenix, Arizona. Cactus & Succulent Journal 77(3): 146-147.
2004
Epipactis gigantea in Marble Canyon. Orchids 73(7): 488.
2003
Sex change in cycads [Roy Osborne and Root Gorelick]. Palms and Cycads 76: 10-15.
2002
The printed book is not a dinosaur: letter to the editor. Chronicle of Higher Education 48(48): 4.
2001
Curved-spined Opuntias. Cactus and Succulent Journal 94(1): 25-27.
2021
Glandulicactus uncinatus var. wrightii at Anthony Gap. Cactus World 39(4): 261-270.
Echinomastus intertextus. Cactus and Succulent Journal 93(3): 197-203. [and cover photo]
Mammillarias of northern New Mexico: M. wrightii and M. meiacantha. Journal of the Mammillaria Society 61(3): 97-101.
2020
Opuntia basilaris var. heilii. Cactus World 38(4): 293-294.
Cylindropuntia leptocaulis x versicolor. Cactus Explorer 26: 80-82.
Coryphantha missouriensis with pectinate spines. Cactus World 38(3): 238.
Cylindropuntia ramosissima – the diamond cholla. Cactus World 38(3): 195-198.
Cuyama River cacti and succulents. Cactus and Succulent Journal 92(3): 189-207.
2019
Spineless Opuntia fragilis. Cactus and Succulent Journal 91(4): 287-288.
Echinocereus reichenbachii subsp. baileyi. Cactus and Succulent Journal 91(3): 177-181.
Opuntia tortispina. Cactus and Succulent Journal 91(1): 197-198.
2017
Rooting Sinningia leaves. Cactus World 35(3): 222.
Opuntia fragilis in the San Juan Islands. Cactus and Succulent Journal 89(4): 185-188.
Historical records of the range of Opuntia fragilis. Cactus Explorer 18: 41-42.
2015
Hesperoyucca whipplei. Cactus and Succulent Journal 87(6): 269-270.
2014
Strange stem architecture of pachycaulous morning glories. Cactus Explorer 13: 88-89.
Sex determination and sex change in cycads: tantalizing new hints. Cycad Newsletter 37(2-3): 29.
Sclerocactus parviflorus amongst the arches. Cactus and Succulent Journal 86(1): 37-39.
From the editor. Haseltonia 19: 2. [and cover photo of Fouquieria columnaris]
2013
Tephrocactus [Root Gorelick and Dan Mahr]. Cactus and Succulent Journal 85(6): 262-276.
Pterocactus. Cactus and Succulent Journal 85(5): 219-221.
What is natural history? CSEE Bulletin 14: 17-19.
2012
Euphorbia antiquorum and James Bond. Cactus and Succulent Journal 84(5): 244-246.
2011
Ferocactus hamatacanthus at Big Bend. Cactus World 29(4): 211-216.
Isotomous branching at the Zamia furfuracea cone axis. Cycad Newsletter 34(1): 29.
Cacti and agaves at the Grand Canyon’s South Rim. Cactus World 29(1): 27-30.
2010
Coryphantha echinus. Cactus World 28(2): 112.
2009
From the editor. Haseltonia 15: 2.
Meritorious micranthocerei. Cactus World 27(3): 183-184.
Columnar cacti of eastern Brazil. [Root Gorelick and Graham Charles].
Odd opuntias: Quiabentia and Brasiliopuntia. Cactus and Succulent Journal 81(3): 162.
After a few wet years in southern New Mexico. Cactus and Succulent Journal 81(1): 22-24. 33.
2008
Fouquieria burragei, a rare species from southern Baja. Cactus and Succulent Journal 80(4): 204-207.
From the editor. Haseltonia 14: 2.
Some crested cacti of Baja California. Cactus and Succulent Journal 80(1): 4-6.
2007
Cochemiea halei on peninsular Baja California Sur. Cactus and Succulent Journal 79(6): 274-275.
From the editor. Haseltonia 13: 2.
The Phoenix Desert Botanical Garden. Cactus World 25(3): 125-136 [plus cover photo]. (Please click here for high-quality page proofs of images)
Northernmost sightings of Bursera microphylla. Cactus and Succulent Journal 79(3): 109.
Corynopuntia marenae. Cactus and Succulent Journal 79(3): 139.
Achlorophyllous Mammillaria grahamii in Tempe, Arizona. Cactus and Succulent Journal 79(1): 4-6.
2006
From the editor. Haseltonia 12: 2.
Hiking New Mexico’s Achenbach Canyon. Cactus and Succulent Journal 78(3): 131-136.
Coryphantha recurvata at Sycamore Canyon. Cactus and Succulent Journal 78(3): 146-149.
Nopalea auberi. Cactus and Succulent Journal 78(3): 151.
Cylindropuntia molesta. Cactus and Succulent Journal 78(2): 95.
Opuntia basilaris. Cactus and Succulent Journal 78(2): 72.
2005
Opuntia quitensis. Cactus and Succulent Journal 77(5): 265.
Bursera microphylla and surrounding spring wildflowers. Cactus and Succulent Journal 77(4): 196-201.
Flower density on a Cleistocactus species. Cactus and Succulent Journal 77(3): 130-131.
Bursera microphylla in Phoenix, Arizona. Cactus & Succulent Journal 77(3): 146-147.
2004
Epipactis gigantea in Marble Canyon. Orchids 73(7): 488.
2003
Sex change in cycads [Roy Osborne and Root Gorelick]. Palms and Cycads 76: 10-15.
2002
The printed book is not a dinosaur: letter to the editor. Chronicle of Higher Education 48(48): 4.
2001
Curved-spined Opuntias. Cactus and Succulent Journal 94(1): 25-27.
2021
Glandulicactus uncinatus var. wrightii (Cactaceae) with 15 cm spines. Journal of the Botanical Research Institute of Texas 15(2): 569-573.
Elevation range of Cylindropuntia acanthocarpa (Cactaceae) is at least 160-1900 m. Journal of the Arizona-Nevada Academy of Science 49(2): 109-115. [Gorelick R & Boone J]
Glandulicactus uncinatus var. wrightii at Anthony Gap. Cactus World 39(4): 261-270.
Echinomastus intertextus. Cactus and Succulent Journal 93(3): 197-203. [and cover photo]
2020
Opuntia basilaris var. heilii. Cactus World 38(4): 293-294.
Cylindropuntia leptocaulis x versicolor. Cactus Explorer 26: 80-82.
Coryphantha missouriensis with pectinate spines. Cactus World 38(3): 238.
Cylindropuntia ramosissima – the diamond cholla. Cactus World 38(3): 195-198.
Cuyama River cacti and succulents. Cactus and Succulent Journal 92(3): 189-207.
Range of Cylindropuntia whipplei (Cactaceae) in New Mexico. Phytoneuron 2020(47): 1-10.
2019
Espostoa (Vatricania) guentheri have unusual cephalia or pseudocephalia. Haseltonia 26: 58-67.
Spineless Opuntia fragilis. Cactus and Succulent Journal 91(4): 287-288.
Echinocereus reichenbachii subsp. baileyi. Cactus and Succulent Journal 91(3): 177-181.
Opuntia tortispina. Cactus and Succulent Journal 91(1): 197-198.
2018
Historical note on rooting succulent leaf cuttings. Haseltonia 24: 63.
2017
Rooting Sinningia leaves. Cactus World 35(3): 222.
Opuntia fragilis in the San Juan Islands. Cactus and Succulent Journal 89(4): 185-188.
Historical records of the range of Opuntia fragilis. Cactus Explorer 18: 41-42.
2016
What is a cephalium? Bradleya 34: 100-124.
2015
Hesperoyucca whipplei. Cactus and Succulent Journal 87(6): 269-270.
From the editor. Haseltonia 20: 2. [and cover photos of Agave shawii ssp. goldmaniana and Matucana madisoniorum]
2014
Strange stem architecture of pachycaulous morning glories. Cactus Explorer 13: 88-89.
Sclerocactus parviflorus amongst the arches. Cactus and Succulent Journal 86(1): 37-39.
From the editor. Haseltonia 19: 2. [and cover photo of Fouquieria columnaris]
2013
Tephrocactus [Root Gorelick and Dan Mahr]. Cactus and Succulent Journal 85(6): 262-276.
Pterocactus. Cactus and Succulent Journal 85(5): 219-221.
Coleocephalocereus purpureus has a cephalium; Micranthocereus streckeri has a pseudocephalium (Cereeae, Cactoideae, Cactaceae). Bradleya 31: 142-149.
Erratum (2014) Bradleya 32: 180.
2012
Euphorbia antiquorum and James Bond. Cactus and Succulent Journal 84(5): 244-246.
2011
Ferocactus hamatacanthus at Big Bend. Cactus World 29(4): 211-216.
Cacti and agaves at the Grand Canyon’s South Rim. Cactus World 29(1): 27-30.
2010
Coryphantha echinus. Cactus World 28(2): 112.
Review of Texas cacti by Brian Loflin and Shirley Loflin. Cactus and Succulent Journal 82(1): 31.
2009
Dracena draco…in Canada. Cactus and Succulent Journal 81(6): 277.
Erratum. Cactus and Succulent Journal 82(1): 31.
From the editor. Haseltonia 15: 2.
Meritorious micranthocerei. Cactus World 27(3): 183-184.
Evolution of cacti is largely driven by genetic drift, not selection. Bradleya 27: 37-48.
Columnar cacti of eastern Brazil. [Root Gorelick and Graham Charles].
Odd opuntias: Quiabentia and Brasiliopuntia. Cactus and Succulent Journal 81(3): 162.
After a few wet years in southern New Mexico. Cactus and Succulent Journal 81(1): 22-24. 33.
2008
Early cactus evolution. Haseltonia 14: 3-5.
From the editor. Haseltonia 14: 2.
Fouquieria burragei, a rare species from southern Baja. Cactus and Succulent Journal 80(4): 204-207.
Some crested cacti of Baja California. Cactus and Succulent Journal 80(1): 4-6.
2007
Cochemiea halei on peninsular Baja California Sur. Cactus and Succulent Journal 79(6): 274-275.
From the editor. Haseltonia 13: 2.
The Phoenix Desert Botanical Garden. Cactus World 25(3): 125-136 [plus cover photo]. (click here for high-quality page proofs of images)
Review of The organ pipe cactus by David Yetman. Plant Science Bulletin 53(2): 74.
Northernmost sightings of Bursera microphylla. Cactus and Succulent Journal 79(3): 109.
Corynopuntia marenae. Cactus and Succulent Journal 79(3): 139.
Review of Bradleya 24 edited by Colin C. Walker. Cactus and Succulent Journal 79(1): 35.
Achlorophyllous Mammillaria grahamii in Tempe, Arizona. Cactus and Succulent Journal 79(1): 4-6.
2006
Review of Ferocactus by John Pilbeam and Derek Bowdery. Cactus World 24(2): 95-96.
From the editor. Haseltonia 12: 2.
Hiking New Mexico’s Achenbach Canyon. Cactus and Succulent Journal 78(3): 131-136.
Coryphantha recurvata at Sycamore Canyon. Cactus and Succulent Journal 78(3): 146-149.
Nopalea auberi. Cactus and Succulent Journal 78(3): 151.
Cylindropuntia molesta. Cactus and Succulent Journal 78(2): 95.
Opuntia basilaris. Cactus and Succulent Journal 78(2): 72.
2005
Opuntia quitensis. Cactus and Succulent Journal 77(5): 265.
Bursera microphylla and surrounding spring wildflowers. Cactus and Succulent Journal 77(4): 196-201.
Flower density on a Cleistocactus species. Cactus and Succulent Journal 77(3): 130-131.
Bursera microphylla in Phoenix, Arizona. Cactus & Succulent Journal 77(3): 146-147.