Allionia incarnata

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 8 August 2004

Aloysia wrightii

6 km east of Robles Junction, Pima County, Arizona, USA
Taken by RL Minckley on 14 August 2010

Argemone pleicantha

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 9 May 2006

Argemone pleicantha

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 29 April 2005

Corydalis aurea

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 8 April 2005

Cylindropuntia spinosior

San Bernardino Valley, Cochise County, Arizona, USA
Taken by RL Minckley on 20 April 2005

Erysimum capitatum

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 8 April 2005

Eschscholzia californica

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 25 April 2002

Hymenoxys odorata

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 30 May 2004

Larrea tridentata

Imperial County, California, USA
Taken by RL Minckley on 8 March 2010

Lepidium thurberi

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 30 May 2004

Lepidium thurberi

Close-up of flowers
San Bernardino Valley, Sonora, Mexico
Taken by T Pasqualucci on 19 August 2005

Mentzelia albicaulis

Sulfur Springs Valley, Cochise County, Arizona, USA
Taken by RL Minckley on 7 August 2018

Opuntia engelmannii

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 7 May 2005

Opuntia santa-rita

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 25 May 2007

Peniocereus greggii

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 14 May 2004

Peniocereus greggii

Close-up of flowers
San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 14 May 2004

Peniocereus greggii

Fruit
Taken by RL Minckley on 11 August 2011

Phacelia arizonica

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 24 March 2005

Phacelia arizonica

Close-up of flowers
San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 24 March 2005

Phacelia crenulata

Taken by RL Minckley on 22 April 2005

Phacelia glandulosa

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 12 April 2005

Physaria gordoni

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 18 March 2007

Proboscidea althaeifolia

with female Perdita hurdi, its only known pollen specialist bee species
San Bernardino Valley, Sonora, Mexico
Taken by C Mayer on 6 August 2007

Proboscidea parviflora

Sulfur Springs Valley, Cochise County, Arizona, USA
Taken by RL Minckley on 5 August 2017

Sphaeralcea laxa

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 25 April 2002

Sphaeralcea laxa

Close-up of flower
San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 25 April 2002

Streptanthus arizonicus

San Bernardino Valley, Sonora, Mexico
Taken by RL Minckley on 24 March 2005