Discocactus

 

Discocactus contains a dozen species of tropical cacti. Most species grow in rock outcrops in the tropical forests, and are endangered in their natural habitat.

Mature Discocactus stop growing, and instead divert their energy into growing a cephalium. The cephalium is a specialized flowering head, generally covered with fibers. Discocactus blooms in summer, on and off. The flowers are generally white and open in late afternoon until the following morning. Many species have fragrant flowers.

Discocactus are tropical species, and should be kept warm in winter. Many species are extremely difficult to keep on their own roots and are generally grafted. The grafted plants are less cold sensitive, but none has any frost tolerance.

Species and varieties
Discocactus bahiensis
Discocactus bahiensis ssp. subviridigriseus
Discocactus ferricola
Discocactus heptacanthus
Discocactus heptacanthus ssp. catingicola
Discocactus heptacanthus ssp. magnimammus
Discocactus horstii
Discocactus placentiformis
Discocactus pseudoinsignis
Discocactus zehntneri
Discocactus zehntneri var. albispinus
Discocactus zehntneri ssp. boomianus
Discocactus albispinus synonym of Discocactus zehntneri var. albispinus
Discocactus alteolens synonym of Discocactus placentiformis
Discocactus araneispinus synonym of Discocactus zehntneri
Discocactus bahiensis synonym of Melocactus bahiensis (Cabeca de Frade)
Discocactus boliviensis synonym of Discocactus heptacanthus
Discocactus boomianus synonym of Discocactus zehntneri ssp. boomianus
Discocactus buenekeri synonym of Discocactus zehntneri
Discocactus cangaensis synonym of Discocactus heptacanthus
Discocactus catingicola synonym of Discocactus heptacanthus ssp. catingicola
Discocactus catingicola var. griseus synonym of Discocactus heptacanthus
Discocactus catingicola ssp. rapirhizus synonym of Discocactus heptacanthus
Discocactus cephaliaciculosus synonym of Discocactus heptacanthus ssp. magnimammus
Discocactus cephaliaciculosus ssp. nudicephalus synonym of Discocactus heptacanthus ssp. magnimammus
Discocactus crassispinus synonym of Discocactus heptacanthus
Discocactus crassispinus ssp. araguaiensis synonym of Discocactus heptacanthus
Discocactus crystallophilus synonym of Discocactus placentiformis
Discocactus diersianus synonym of Discocactus heptacanthus ssp. magnimammus
Discocactus diersianus ssp. goianus synonym of Discocactus heptacanthus
Discocactus estevesii synonym of Discocactus heptacanthus
Discocactus flavispinus synonym of Discocactus heptacanthus
Discocactus goianus synonym of Discocactus heptacanthus
Discocactus griseus synonym of Discocactus heptacanthus
Discocactus hartmannii synonym of Discocactus heptacanthus
Discocactus hartmannii var. magnimammus synonym of Discocactus heptacanthus ssp. magnimammus
Discocactus hartmannii var. patulifolius synonym of Discocactus heptacanthus
Discocactus hartmannii ssp. giganteus synonym of Discocactus heptacanthus
Discocactus hartmannii ssp. setosiflorus synonym of Discocactus heptacanthus
Discocactus heptacanthus ssp. melanochlorus synonym of Discocactus heptacanthus
Discocactus insignis synonym of Discocactus placentiformis
Discocactus latispinus synonym of Discocactus placentiformis
Discocactus lindaianus synonym of Discocactus heptacanthus
Discocactus magnimammus synonym of Discocactus heptacanthus ssp. magnimammus
Discocactus magnimammus ssp. bonitoensis synonym of Discocactus heptacanthus
Discocactus mamillosus synonym of Discocactus heptacanthus
Discocactus melanochlorus synonym of Discocactus heptacanthus
Discocactus multicolorispinus synonym of Discocactus placentiformis
Discocactus nigrisaetosus synonym of Discocactus heptacanthus
Discocactus pachythele synonym of Discocactus heptacanthus
Discocactus paranaensis synonym of Discocactus heptacanthus
Discocactus patulifolius synonym of Discocactus heptacanthus
Discocactus piauiensis synonym of Discocactus heptacanthus
Discocactus promentigibbus synonym of Discocactus heptacanthus
Discocactus pseudolatispinus synonym of Discocactus placentiformis
Discocactus pugionacanthus synonym of Discocactus placentiformis
Discocactus pulvinicapitatus synonym of Discocactus placentiformis
Discocactus rapirhizus synonym of Discocactus heptacanthus
Discocactus semicampaniflorus synonym of Discocactus heptacanthus
Discocactus silicicola synonym of Discocactus heptacanthus
Discocactus silvaticus synonym of Discocactus heptacanthus
Discocactus spinosior synonym of Discocactus heptacanthus
Discocactus squamibaccatus synonym of Discocactus heptacanthus
Discocactus subterraneo-proliferans synonym of Discocactus heptacanthus
Discocactus subviridigriseus synonym of Discocactus bahiensis ssp. subviridigriseus
Discocactus tricornis synonym of Discocactus placentiformis
Discocactus zehntneri var. horstiorum synonym of Discocactus zehntneri
Discocactus zehntneri ssp. araneispinus synonym of Discocactus zehntneri
Discocactus zehntneri ssp. buenekeri synonym of Discocactus zehntneri
Discocactus zehntneri ssp. horstiorum synonym of Discocactus zehntneri

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