🌵 Very Rare / Threatened / Micro-endemic Species 🌵
- Blossfeldia liliputana – Bolivia / Argentina
- Obregonia denegrii – Mexico
- Geohintonia mexicana – Mexico
- Pelecyphora aselliformis – Mexico
- Pelecyphora strobiliformis – Mexico
- Yavia cryptocarpa – Argentina
- Frailea castanea – Uruguay / Brazil
🌵 Critically Endangered Cacti 🌵
- Aztekium hintonii – Mexico (Nuevo León)
- Aztekium ritteri – Mexico
- Ariocarpus bravoanus – Mexico
- Ariocarpus scaphirostris – Mexico
- Mammillaria herrerae – Mexico
- Mammillaria luethyi – Mexico
- Turbinicarpus alonsoi – Mexico
- Turbinicarpus schmiedickeanus – Mexico
- Pediocactus knowltonii – USA (New Mexico)
- Echinocactus grusonii – Mexico (nearly extinct in wild)
🌵 Weirdest Cacti 🌵
- Aztekium ritteri
- Geohintonia mexicana
- Leuchtenbergia principis
- Obregonia denegrii
- Strombocactus disciformis
🌵 Giant Cacti 🌵
- Carnegiea gigantea
- Pachycereus pringlei
- Echinopsis terscheckii, syn. Trichocereus terscheckii, syn. Leucostele terscheckii
- Browningia candelaris
🌵 Slowest Growing Cacti 🌵
🌵 All Cacti 🌵
Family: Cactaceae
Family Cactaceae contains about 145 genera and more than 1700 species.Subfamilies:
├─ Blossfeldioideae (monogeneric)├─ Cactoideae
├─ Leuenbergerioideae (monogeneric)
├─ Maihuenioideae (monogeneric)
├─ Opuntioideae
└─ Pereskioideae (monogeneric)
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Subfamily: Blossfeldioideae (monogeneric)
- Tribe: Blossfeldieae
- Blossfeldia liliputana GLOBULAR, TINY, RARE, SLOW-GROWING
- Tribe: Blossfeldieae
-
Subfamily: Cactoideae
- Tribe: Cacteae
- Acharagma
- Ariocarpus GLOBULAR, RARE, SLOW-GROWING
- Astrophytum GLOBULAR
- Aztekium GLOBULAR, RARE, SLOW-GROWING
- Cochemiea GLOBULAR
- Coryphantha GLOBULAR, RARE
- Digitostigma
- Echinocactus SLOW-GROWING
- Echinomastus GLOBULAR
- Epithelantha GLOBULAR, TINY, SLOW-GROWING
- Escobaria
- Ferocactus
- Geohintonia RARE, ENDANGERED
- Glandulicactus
- Kadenicarpus
- Leuchtenbergia RARE
- Lophophora ENDANGERED, SLOW-GROWING
- Mammillaria
- Neolloydia (syn. Cochemiea)
- Obregonia RARE, SLOW-GROWING
- Ortegocactus
- Pediocactus
- Pelecyphora RARE, SLOW-GROWING
- Rapicactus
- Sclerocactus ENDANGERED
- Stenocactus HARDY
- Strombocactus RARE, SLOW-GROWING
- Thelocactus
- Turbinicarpus RARE, SLOW-GROWING, TINY
- Tribe: Cereeae
- Acanthocalycium
- Arrojadoa COLUMNAR
- Brasilicereus COLUMNAR
- Cereus COLUMNAR, GIANT, FAST-GROWING
- Cipocereus COLUMNAR
- Cleistocactus COLUMNAR
- Coleocephalocereus COLUMNAR
- Denmoza COLUMNAR
- Discocactus RARE, SENSITIVE
- Echinopsis FAST-GROWING
- Espostoa COLUMNAR
- Espostoopsis COLUMNAR
- Facheiroa COLUMNAR
- Gymnocalycium SHADE-TOLERANT
- Haageocereus COLUMNAR
- Harrisia NIGHT-BLOOMING
- Leocereus COLUMNAR
- Matucana
- Melocactus SENSITIVE
- Micranthocereus COLUMNAR
- Mila
- Monvillea COLUMNAR
- Oreocereus COLUMNAR, HARDY
- Oroya
- Pilosocereus COLUMNAR
- Praecereus COLUMNAR
- Rebutia TINY, HARDY
- Samaipaticereus COLUMNAR
- Soehrensia COLUMNAR, GIANT
- Stephanocereus COLUMNAR
- Stetsonia COLUMNAR, GIANT
- Trichocereus COLUMNAR, GIANT, FAST-GROWING
- Uebelmannia
- Weberbauerocereus COLUMNAR
- Yungasocereus COLUMNAR
- Tribe: Copiapoeae
- Copiapoa SLOW-GROWING, RARE
- Tribe: Fraileae
- Frailea TINY, RARE
- Tribe: Lymanbensonieae
- Lymanbensonia EPIPHYTIC
- Pfeiffera EPIPHYTIC
- Tribe: Notocacteae
- Austrocactus HARDY
- Eriosyce
- Eulychnia COLUMNAR
- Neowerdermannia
- Parodia HARDY
- Yavia TINY, SLOW-GROWING, RARE, ENDANGERED
- Tribe: Phyllocacteae
- Acanthocereus NIGHT-BLOOMING
- Armatocereus COLUMNAR
- Bergerocactus
- Browningia COLUMNAR
- Calymmanthium COLUMNAR
- Carnegiea COLUMNAR, SLOW-GROWING, GIANT
- Cephalocereus COLUMNAR
- Corryocactus COLUMNAR
- Dendrocereus COLUMNAR
- Disocactus EPIPHYTIC
- Echinocereus HARDY
- Epiphyllum EPIPHYTIC, NIGHT-BLOOMING
- Escontria COLUMNAR
- Hylocereus (syn. Selenicereus) EPIPHYTIC, NIGHT-BLOOMING, FAST-GROWING
- Isolatocereus COLUMNAR
- Jasminocereus COLUMNAR
- Lemaireocereus COLUMNAR
- Leptocereus COLUMNAR
- Myrtillocactus COLUMNAR
- Neobuxbaumia COLUMNAR, GIANT
- Neoraimondia COLUMNAR
- Pachycereus COLUMNAR, GIANT
- Peniocereus NIGHT-BLOOMING
- Polaskia COLUMNAR
- Pseudomitrocereus COLUMNAR
- Pseudorhipsalis EPIPHYTIC
- Selenicereus EPIPHYTIC, NIGHT-BLOOMING
- Stenocereus COLUMNAR, GIANT
- Weberocereus EPIPHYTIC
- Tribe: Rhipsalideae
- Hatiora EPIPHYTIC
- Lepismium EPIPHYTIC
- Rhipsalis EPIPHYTIC, SHADE-TOLERANT
- Schlumbergera EPIPHYTIC
-
Subfamily: Leuenbergerioideae* (monogeneric)
- Tribe: Leuenbergerieae
- Leuenbergeria TROPICAL
-
Subfamily: Maihuenioideae* (monogeneric)
- Tribe: Maihuenieae
- Maihuenia HARDY
-
Subfamily: Opuntioideae
- Tribe: Opuntieae
- Tribe: Cylindropuntieae
- Austrocylindropuntia HARDY
- Cylindropuntia HARDY
- Grusonia
- Pereskiopsis FAST-GROWING, TROPICAL
- Quiabentia TROPICAL
- Tribe: Pterocacteae
- Maihueniopsis HARDY
- Pterocactus HARDY
- Tephrocactus HARDY
-
Subfamily: Pereskioideae (monogeneric)
- Tribe: Pereskieae
- Pereskia TROPICAL
*Leuenbergerioideae and Maihuenioideae are basal cactus lineages that diverged before the main groups (Opuntioideae and Cactoideae). They retain more "ancestral" traits (persistent leaves, tree/shrub habit), distinct from most other cacti.
❄️ Climate / hardiness traits:
HARDY — tolerates short frost (−5 °C or lower)
SEMI-HARDY — tolerates light and short frost (0 °C to −5 °C)
SENSITIVE — cannot tolerate frost; must be kept above 5–10 °C
TROPICAL — requires warm conditions year-round
HEAT-TOLERANT — tolerates extreme sun and desert heat
SHADE-TOLERANT — can grow with less direct sun
🌵 Growth form:
GLOBULAR — spherical form
COLUMNAR — tall column cactus
SPINELESS — cactus without thorns
SPINY — cactus with thorns
NIGHT-BLOOMING — flowers open only at night
EPIPHYTIC — grows on trees or rocks, not in soil
⏱️ Growth rate:
SLOW-GROWING
FAST-GROWING
GIANT — very large cactus.
TINY — very small cactus.
🌍 Conservation / availability:
RARE - naturally rare or limited distribution, very limited habitat or cultivation
ENDANGERED – officially threatened or habitat decline
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