Genera & Species for Cacti and Succulents currently holds 795 genus types and 13,566 species of cacti and succulents. We also have 39,902 identified Cacti and Succulent plants and 145,732 photos uploaded by our 10,439 members.

Genus and species are biological classifications forming part of the taxonomic rank of organisms. Genus (plural genera) fits between Family and Species in the botany taxonomy.

Family -> Genus -> Species

Synonyms are used in classifications where an item can be known by a different name. This occurs when a plant is independently named more than once. A synonym is a scientific name which is an alternative to the correct name defined in the taxonomy. The key point is that they are alternatives to and not interchangeable with the correct name.

When specifying a species it is usual to use the binomial nomenclature where the genus forms the first part of the name. For example, the cacti Echinocereus pectinatus is part of the genus Echinocereus and the species Pectinatus.

Cacti are members of the plant Family Cactaceae. The family Cactaceae has about 130 genera and 1,500 species.

Almost all cacti are succulents. A succulent is a type of plant with thickened, fleshy parts such as the leaves and the stem. These are usually used to retain water. Succulents are found across over 25 plant families with a small number of families being almost exclusively succulents . One of these is the family Cactaceae, this is the family of which all Cacti are members.

For details of the structure of genus, species and synonyms please see these references:

For a full list of all Cacti and Succulent plant classifications you can search on

At we maintain a list of genus and species for cacti and succulents. We use the resources at WorldFloraOnline as the definitive list and we add genera, species and synonyms when a suggestion is made in the identification of one the plants in our collections.

To identify your plant you can browse our cactus database or create an account on and submit your photos for identification.

You can browse the list of genera in the cactus database from our genus page.

The most popular genus types among collectors are:

Our species list is displayed alphabetically by the full species name (genus species). You can browse the species using the links below.

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

The most popular species among collectors are:

Echinopsis oxygona
Echinopsis oxygona
1.  Echinopsis oxygona 398 identifications

    - Cereus oxygonus
    - Echinocactus multiplex
    - Echinocactus octogonus
    - Echinocactus oxygonus
    - Echinocactus sulcatus
    - Echinonyctanthus multiplex
    - Echinonyctanthus oxygonus
    - Echinopsis brasiliensis
    - Echinopsis multiplex
    - Echinopsis oxygona f. brevispina
    - Echinopsis paraguayensis
    - Echinopsis schwantesii

Cereus peruvianus fma. monstruosa
Cereus peruvianus fma. monstruosa
2.  Cereus peruvianus fma. monstruosa 227 identifications


Mammillaria elongata
Mammillaria elongata
3.  Mammillaria elongata 219 identifications

    - Mammillaria densa

Astrophytum myriostigma
Astrophytum myriostigma
4.  Astrophytum myriostigma 218 identifications

    - Astrophytum coahuilense
    - Astrophytum columnare
    - Astrophytum depressum
    - Astrophytum myriostigma subsp. coahuilense
    - Astrophytum myriostigma subsp. glabrum
    - Astrophytum myriostigma subsp. potosinum
    - Astrophytum myriostigma subsp. tamaulipense
    - Astrophytum myriostigma subsp. tulense
    - Astrophytum myriostigma var. cereiforme
    - Astrophytum myriostigma var. coahuilense
    - Astrophytum myriostigma var. columnare
    - Astrophytum myriostigma var. grandiflorum
    - Astrophytum myriostigma var. minimiflorum
    - Astrophytum myriostigma var. potosinum
    - Astrophytum myriostigma var. strongylogonum
    - Astrophytum myriostigma var. tamaulipense
    - Astrophytum myriostigma var. tulense
    - Astrophytum myriostigma var. verum
    - Astrophytum prismaticum
    - Astrophytum prismaticum
    - Astrophytum tulense
    - Astrophytum tulense
    - Cereus colicochus
    - Echinocactus myriostigma
    - Echinocactus myriostigma f. columnaris
    - Echinocactus myriostigma subsp. coahuilensis
    - Echinocactus myriostigma subsp. potosinus
    - Echinocactus myriostigma var. coahuilensis
    - Echinocactus myriostigma var. columnaris

Echinopsis chamaecereus
Echinopsis chamaecereus
5.  Echinopsis chamaecereus 217 identifications

    - Cereus silvestrii
    - Cereus silvestrii var. crassicaulis
    - Chamaecereus silvestrii
    - Lobivia silvestrii

Mammillaria bocasana ssp. bocasana
Mammillaria bocasana ssp. bocasana
6.  Mammillaria bocasana ssp. bocasana 211 identifications


Mammillaria gracilis
Mammillaria gracilis
7.  Mammillaria gracilis 192 identifications

    - Mammillaria fragilis
    - Mammillaria gracilis var. pulchella
    - Mammillaria vetula ssp. gracilis

Gymnocalycium baldianum
Gymnocalycium baldianum
8.  Gymnocalycium baldianum 191 identifications

    - Echinocactus sanguiniflorus
    - Gymnocalycium baldianum var. albiflorum
    - Gymnocalycium sanguiniflorum
    - Gymnocalycium venturianum

Parodia leninghausii
Parodia leninghausii
9.  Parodia leninghausii 188 identifications

    - Echinocactus lenninghausii
    - Eriocactus lenninghausii
    - Eriocactus lenninghausii f. apelii
    - Eriocactus lenninghausii var. minor
    - Eriocephala lenninghausii
    - Notocactus leninghausii
    - Parodia lenninghausii var. minor
    - Pilocereus leninghausii
    - Pilosocereus leninghausii

Echinopsis subdenudata
Echinopsis subdenudata
10.  Echinopsis subdenudata 183 identifications