Kadenicarpus
| Kadenicarpus | |
|---|---|
| File:Kadenicarpus pseudomacrochele.jpg | |
| Kingdom | Plantae |
| Family | Cactaceae |
| Subfamily | Cactoideae |
| Tribe | Cacteae |
| SubTribe | |
| Genus | Kadenicarpus |
| Species | |
| Notes | Taxonomy follows Joël Lodé (2015/2019). Lodé recognizes this genus as distinct from Turbinicarpus based on morphological and molecular evidence. |
Etymology
The genus is named in honor of the Russian botanist Nickolai Kaden (1914–1976), combined with the Greek karpos (fruit).
Description
Kadenicarpus consists of small, globose to shortly cylindrical cacti, often with a large, tuberous taproot.
- Stems: Solitary or clustering, grey-green to bluish-green. The surface is divided into distinct, often rounded or pyramidal tubercles.
- Spines: Variable, usually relatively soft or papery, often curved or twisted, mimicking dry grass or debris.
- Flowers: Diurnal, funnel-shaped, appearing from the woolly apex. Colors range from white and yellowish to brilliant magenta or purple.
- Fruits: Small, globose, and fleshy at first, but drying and dehiscing (opening) by a basal pore or longitudinal slit.
- Seeds: Small, black, with a tuberculate (bumpy) testa.
Habitat
The genus is endemic to the high-altitude semi-desert regions of Mexico. They grow in specialized niches, often in mineral-rich soils or crevices of limestone rocks, at altitudes between 1700 m and 2400 m.
Distribution
- Mexico: Primarily in the states of Hidalgo, Querétaro, and San Luis Potosí.
Species and Subspecies
Following the 2019 updates by Lodé, the genus includes 2 species and 2 subspecies:
- Kadenicarpus horripilus (Type species)
- Kadenicarpus pseudomacrochele
Taxonomy
Formerly part of Turbinicarpus (Section Kadenicarpus), molecular studies (Vázquez-Sánchez et al., 2013) confirm that these species form a clade more closely related to Neolloydia and Gymnocactus than to the core Turbinicarpus species. Lodé (2015) emphasizes that the larger body size and different fruit dehiscence justify their status as a separate genus.
