Mammillaria duweiRogoz . & P.J.Braun
Mammillaria crinitasubsp.duwei , Mammillaria nanasubsp.duwei , Mammillaria trichacanthasubsp.duwei
Family : CactaceaeSubfamily : CactoideaeTribe : CacteaeSubtribe : CactinaeGenus : Mammillaria
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Mammillaria duweiis a small , slow - growing cactus with coloured green , globose to short cylindric stems covered with tubercles slant with clusters of spines . The stem can grow nonsocial or in clumps , reaching up to 1.6 column inch ( 4 atomic number 96 ) in pinnacle and 2.4 in ( 6 cm ) in diam . Each areole bears 0 to 2 central and 28 to 36 radial spine . The radiate spines are thin , clean , brownish at the base , interlacing , and closely appressed to the stem turn , measuring up to 0.15 inch ( 0.4 cm ) long . The key spines are yellowish and hooked , measure up to 0.8 inches ( 2 centimeter ) long .
The flowers are funnel - form , yellowish or ointment to light yellow , and can give up to 0.8 inch ( 2 curium ) in diameter . They appear in spring , forming a hoop near the top of the stem . The fruits are ruby-red , cabaret - shaped , and incorporate bantam blackish seed .
USDA hardiness zones9b to 11b : from 25 ° F ( −3.9 ° C ) to 50 ° F ( +10 ° C ) .
To encourage better flowering , allow the plants to enjoy a cooling period in the winter and suspendwatering . Unlike many other cactus , which use their rib as entrepot devices , Mammillariafeature raised tubercles , from which spines emerge . When you water , the tubercles will expand to increase urine storage . The flowers emerge from the axil of these tubercles on the former year ’s growth , which accounts for their interesting aura effect . The cactus must n’t be exhibit to prolonged moistness and sitting water . Never let your cactus sit in a dish of water . last , fertilizeduring the growing season for the best termination .
Repot as postulate , preferably during the strong time of year . To repotMammillaria , ensure thesoilis dry before repotting , then mildly take the lot . bump away the one-time territory from the antecedent , removing any decayed or deadened roots . Treat any cuts with a fungicide . Place the works in its young pot and backfill it with potting filth , spread the theme as you repot . Leave the plant dry for a week or so , then start to piddle gently to reduce the peril of root rot .
See more atHow to Grow and Care for Mammillaria .
Mammillaria duweiis endemical toMexico . It occurs only at one location northeast of the urban center of Guanajuato .
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