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    Hamatocactus setispinus (Engelmann) Britton & Rose
    [The best name for this species is Hamatocactus bicolor (Terán & Berlandier) I.M Johnston]


    Flowering at Sul Ross in 2010. Collected in 2004 from the same population in Jim Hogg County, Texas that is shown farther below.





      Growing with an Astrophytum asterias population in Starr Co, Texas.





      Growing with a L. williamsii population east of Rio Grande City in Starr County, Texas.





      Growing amidst a L. williamsii population in Jim Hogg County, Texas.


    setispinus



    Notice the drought stimulated predation in some of the images on this page?


    Take a look at Hamatocactus setispinus in southwestern Hidalgo County, Texas.



      The following two images were taken from our archival photos.
      Plant cultivated in the cactus garden at the Los Angeles Arboretum.






    Hamatocactus bicolor is the correct name within Hamatocactus but care should be taken NOT to equate Hamatocactus bicolor with Thelocactus bicolor which is an entirely different plant.
        We are employing H. setispinus as the title for this entry simply to lessen chances of confusion between the two different "bicolor"s.
        Inclusion of setispinus within Thelocactus seems questionable as this species lacks tubercles (except as young seedlings) & lacks fruit dehiscing via a basal pore. It also has divergent seed morphology.





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    Cactus Conservation Institute