Coryphantha
| Coryphantha | |
|---|---|
| File:Coryphantha elephantidens.jpg | |
| Kingdom | Plantae |
| Family | Cactaceae |
| Subfamily | Cactoideae |
| Tribe | Cacteae |
| SubTribe | |
| Genus | Coryphantha |
| Species | |
| Notes | Taxonomy follows Joël Lodé (2015) with insights from Breslin et al. (2021). |
Etymology
The name is derived from the Greek words koryphe (summit/top) and anthos (flower), referring to the characteristic position of the flowers at the apex of the plant.
Description
Coryphantha comprises globose to cylindrical cacti that grow as solitary individuals or form dense clumps. Their most distinguishing morphological feature is the **longitudinal furrow** (groove) on the upper side of the prominent tubercles. Unlike Mammillaria, where flowers emerge from the axils of older tubercles, Coryphantha flowers appear at the base of the furrow on young, developing tubercles at the stem apex.
The flowers are diurnal, relatively large, and funnel-shaped. They are most commonly bright yellow, but shades of pink, magenta, and creamy-white also occur. The fruits are fleshy, typically green or yellowish, and contain brown or black seeds with a smooth or finely reticulated surface.
Habitat
The genus is primarily centered in the **Chihuahuan Desert**. They grow in diverse environments, from loamy meadows and dry prairies to steep limestone cliffs and volcanic soils. They are found at altitudes ranging from 500 m to 2700 m, often growing under the protection of nurse plants in the matorral scrublands.
Distribution
- Mexico: Widely distributed (Chihuahua, Coahuila, Durango, San Luis Potosí, etc.).
- USA: Arizona, New Mexico, Texas.
Species
Joël Lodé recognizes 47 species and 8 subspecies:
- Coryphantha clavata
- Coryphantha compacta
- Coryphantha cornifera
- Coryphantha delaetiana
- Coryphantha delicata
- Coryphantha difficilis
- Coryphantha durangensis
- Coryphantha echinoidea
- Coryphantha echinus
- Coryphantha elephantidens
- Coryphantha erecta
- Coryphantha georgii
- Coryphantha glanduligera
- Coryphantha glassii
- Coryphantha gracilis
- Coryphantha hintoniorum
- Coryphantha jalpanensis
- Coryphantha kracikii
- Coryphantha laui
- Coryphantha longicornis
- Coryphantha maiz-tablasensis
- Coryphantha melleospina
- Coryphantha neglecta
- Coryphantha nickelsiae
- Coryphantha octacantha
- Coryphantha ottonis
- Coryphantha pallida
- Coryphantha poselgeriana
- Coryphantha potosiana
- Coryphantha pseudoechinus
- Coryphantha pseudonickelsiae
- Coryphantha pulleineana
- Coryphantha pycnacantha
- Coryphantha radians
- Coryphantha ramillosa
- Coryphantha recurvata
- Coryphantha reduncispina
- Coryphantha retusa
- Coryphantha robustispina
- Coryphantha salinensis
- Coryphantha sulcata
- Coryphantha sulcolanata
- Coryphantha tripugionacantha
- Coryphantha vaupeliana
- Coryphantha voghterriana
- Coryphantha werdermannii
- Coryphantha wohlschlageri
Notes
- Phylogeny: According to the latest molecular research (Breslin et al., 2021), Coryphantha belongs to a specific "Mammilloid" clade. It is confirmed as distinct from Mammillaria s.s. and shows a close sister-group relationship with Cochemiea and Escobaria.
- Taxonomic Segregates: Lodé notes that some lineages previously included in Coryphantha are now recognized as separate genera by some authors, such as Cumarinia, Lepidocoryphantha, and Neobesseya.
- Pollination: The large, nectar-rich flowers are primarily pollinated by native bees (e.g., Diadasia rinconis).
