Echinocereus rigidissimus(Engelm . ) F.Haage
Arizona Rainbow Cactus , Rainbow Hedgehog Cactus , Sonoran Rainbow Cactus
Cereus pectinatusvar.rigidissimus , Echinocereus dasyacanthusvar.rigidissimus , Echinocereus pectinatusvar.rigidissimus , Echinocereus rigidissimussubsp.rigidissimus
Photo viawikipedia.org
house : CactaceaeSubfamily : CactoideaeTribe : PachycereeaeGenus : Echinocereus
Echinocereus rigidissimusis a beautiful small cactus with an vertical , short cylindric , unremarkably nongregarious stem with 15 to 26 rib lines with cluster of pectinately set spines straight or slightly curved toward the stem . The stem can grow up to 12 in ( 30 cm ) tall and 4.4 inches ( 11 cm ) in diameter . The spines are up to 0.4 inches ( 1 cm ) long , initially reddish to Battle of Magenta , and become yellow or light pink as they mature . Each areole bears 16 to 22 radial spine . The fundamental spines are absent .
The sporty flowers are smart rose - pink or magenta with a white pharynx and come out at the top of the stem in late spring . They are funnel - shape and can reach up to 3.2 inch ( 8 centimeter ) in distance and 3.6 inches ( 9 curium ) in diameter . The spiny fruits are orbicular , greenish to obscure purplish - brown , and contain white pulp and dark brown to disastrous seeds .
Echinocereus rigidissimusis aboriginal toMexico(Chihuahua and Sonora ) and theUnited States(Arizona and New Mexico ) .
The specific name " rigidissimus(rig - id - ISS - ih - mus ) " mean " very inflexible , most fixed " and refer to the starchy spines .
USDA hardiness zones9a to 11b : from 20 ° F ( −6.7 ° C ) to 50 ° F ( +10 ° century ) .
If you’re able to grow other globular cactus successfully , you’re able to most probably growEchinocereuswell . One of the fundamental factors in success with these is avoiding any wind of wet filth . Because their root systems are unaccented , they are especially prostrate toroot rot , eventually killing your plant . Otherwise , they thrive on a syllabus of intense , bright light , slim water , and a steady dieting of light plant food . These cacti are vulnerable tomealybugsand aphids .
Echinocereusare easy - growing cacti that should only take repotting every other twelvemonth or so . you may keep up the time to repotting by removing plantlets and potting them up in their own pots . When repotting a cactus , get rid of it from its kitty and take any clumped soil . These plant life tend to be shallow - take root with washy root organisation , so take care not to damage their roots .
Learn more atHow to Grow and handle for Echinocereus .
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