Discocactus placentiformis subs. multicolorispinus
Kakteen Sukk. 59(8): 212 (211; figs.). 2008 [Aug 2008] (cf: Kakteen Sukk. 44(5): 105. 1993 nom. inval. basionym not validly published )
Family
Cactaceae
Genus
Species
Discocactus placentiformis subs. multicolorispinus
Author
P.J.Braun & Esteves
Chinese genus
圆盘玉属
Chinese name
-
Accepted
DescriptionEdit description
Central Spines
In some plants one central spine appears, but is usually absent. It is erect, 1,5-2 cm long.
Cephalium
Cream-white.
Flowers
Nocturnal lasting only a single night, and rapidly collapsing into mush the next morning, extremely fragrant, slender funnelform, white arising from the cephalium. The position of the stigma is half-way up the stamens.
Blooming Season
Summer, it needs a good exposure to with some sun to bloom, so it's pretty rare to have blossoms when in cultivation in greenhouses. It is not unusual for this Melocactus to take 7 or more years before it starts blooming, but once it does, it should every year. Grafted plants may flower in 3 years.
Ribs
About 13. Number of areoles per rib is around 10 on plants with cephalium.
Stem
Flattened-globular, less than 8 cm tall and about 12 cm in diameter dark green green, with woolly cephalium.
Radial Spines
5 to 8 of which the 2(-4) upper ones shorter pointing upwards about 5 mm long. The length of the spines on the sides and downwards is about 1.5 cm. Mostly amber like, but variable in colouration.
Fruits
Club shaped white.
Areoles
Round.