WithinMammillaria karwinskiana , four subspecies have been recognized , including the following subspecies : Mammillaria karwinskianasubsp.beiselii , Mammillaria karwinskianasubsp.collinsii , Mammillaria karwinskianasubsp.karwinskiana , andMammillaria karwinskianasubsp.nejapensis .
Mammillaria karwinskianaMart .
Royal Cross , Royal Cross Cactus
In habitat, Santiago Suchilquitongo, Oaxaca, Mexico. Derivative of a photo byBekw Gasj. Licensed underCC BY-NC 4.0.
Cactus karwinskianus , Mammillaria karwinskianasubsp.karwinskiana , Neomammillaria karwinskiana
Family : CactaceaeSubfamily : CactoideaeTribe : CacteaeSubtribe : CactinaeGenus : Mammillaria
The specific name " karwinskiana(pronounced kar - winz - kee - AH - na ) " honorsWilhelm Friedrich Karwinsky von Karwin(1780 - 1855 ) , a Bavarian natural scientist who collected plant and animal in Brazil ( 1821 - 1826 ) and Mexico ( 1826 - 1831 , 1840 ) .
In cultivation, Odesa, Ukraine. Derivative of a photo by Лариса Семенюк. Used with permission. All rights reserved.
Mammillaria karwinskianais native toGuatemalaandMexico(Chiapas , Oaxaca , Puebla , Morelos , Guerrero , Michoacán , and Colima ) . It grows in tropical deciduous forests and xerophilous scrub at elevations between 490 and 6,890 foot ( 150 and 2,100 m ) .
Mammillaria karwinskianais a small cactus with green , spherical to short cylindric bow with pyramidal , spirally arrangedtuberclestipped with clump of spines . The stem can growsolitaryor tardily arm basally or dichotomously , reaching up to 8 inch ( 20 centimeter ) in superlative and 4.8 inches ( 12 cm ) in diameter . They develop whitetomentumat theapex . Theaxilsof the nodule have tufts of blanched hair and foresightful white bristle . Eachareoleusually bears six straight to slightly curved radial spines . The sticker are cream to reddish with a brownish tip , become chalky snowy with geezerhood , produce up to 1.2 inch ( 3 cm ) long . The fundamental acantha are absent .
The prime are funnel - shaped , cream to intermediate yellow with purplish midveins , and come out in spring , forming a circle around the stalk just below the apex of the sun’s way . They can reach up to 1 inch ( 2.5 cm ) in length and 0.6 in ( 1.5 centimetre ) in diameter . The fruit are crimson , club - form , and quite attractive .
In habitat, Evangelista Analco, Oaxaca, Mexico. Derivative of a photo byLuis Alberto. Licensed underCC BY-NC 4.0.
Light : For optimal increase of yourMammillaria karwinskiana , ensure it is planted in an area that receives at least four hours of verbatim sunlight day by day . If growing indoors , placing the cactus near a bright window is estimable to assure it catch enough light . For extra light , it is advisable to keep it on the balcony or in the garden from spring to strike .
grunge : To insure skillful root aeration and drainage , apply commercial-grade cactus dirt orcreate your own well - draining soil admixture .
Temperature : Mammillaria karwinskianais heat up tolerant but is not a cold - hardy plant . It arise best inUSDA Plant Hardiness Zones9b to 11b , with average minimum winter temperatures ranging from 25 to 50 ° F ( -3.9 to 10 ° 100 ) .
Dichotomous branching. In cultivation, Odesa, Ukraine. Photo by Лариса Семенюк. Used with permission. All rights reserved.
Watering : Water deeply from spring to fall down , and hold back until the dirt dries out before lachrymation again . Never let your pot sit in weewee , and suspendwateringwhen the plant move dormant in the winter .
Fertilizing : During the growing time of year , Mammillaria karwinskianabenefits fromfertilizing . Apply a water - soluble fertilizer for cacti and other succulents . debar feeding during the winter when the plant goes dormant .
Repotting : Repot the cactus into a slightly larger mass every two or three yr , preferably during recent wintertime or early natural spring . However , repotting can be done at any time of the year .
generation : There are two easy ways to propagateMammillaria karwinskiana : by seeds or by separate offsets . The good prison term to get rid of offsets is in springtime and summertime . Sow the seeds in previous saltation or summer for the full termination .
Learn more atHow to Grow and Care for Mammillaria .
Mammillaria karwinskianais non - toxic but has sharp spines , so keep it away from tyke and deary .
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