Turbinicarpus

Halda & Panar.

Halda & Panar.

Halda & Panar.

Halda & Panar.

Halda & Panar.

Říha

Backeb.

A flattened cactus with triangular tubercles, flexible grey spines and magenta flowers. It occurs in Mexico. Microscopic studies describe a cracked spine surface, sunken stomata and an unusual arrangement of vascular bundles in stem parenchyma.

García-Mor., Gonz.-Bot., Matusz., Nitzschke & Iamonico

(Werderm.) V.John & Říha

Matusz., Myšák & Jiruše

Lüthy & A.B.Lau

A small turbinicarpus with bristle-like spines and feathery epidermal projections. Studies of propagation from seedling fragments show the possibility of shoot regeneration, rooting and acclimatisation. The species is one parent of T. × mombergeri.

A Turbinicarpus studied at sites including the lowland plains of San Luis Potosí. Its cortical bundles have xylem surrounded by phloem. The literature also presents germination of stored seeds and responses of cell-wall genes in root cultures.

Šnicer, Myšák, Zachar & Jiruše

A species with small protrusions on spine epidermal cells and a single-layered hypodermis in the material studied. Its seeds were used in storage and germination experiments, and with T. laui it forms the hybrid T. × mombergeri.

(Boed.) V.John & Říha

An extensive complex of small Mexican cacti. Individual subspecies differ in spines and stem-surface microstructure. Papery and corky spines allow the relationship between cell walls and properties of the whole organ to be traced in detail.

Diers

A species with feathery spines whose epidermis forms long projections. Microscopic structure combines a delicate appearance with thick fibre walls inside the spine. Shoot-culture studies also describe how hyperhydricity can be reduced.

(Werderm.) V.John & Říha