Rebutia senilis.

Rebutia species mix. An assortment of several varieties.

Rebutia spegazzinia

Rebutia spinosissima. Syn: Rebutia fiebrigii, Aylostera fiebrigii

Rebutia tamboensis. 

Rebutia vallegrandensis.

Rebutia walteri.

Rhipsalis species mix.

Roseocereus tephracanthus

Roseocereus tephracanthus v. del oro

Sclerocactus seeds are difficult to germinate as they contain inhibitors, and require cold stratification or prolonged soaking of the seeds to trigger germination. : (CITI protected. Cannot ship out of USA).

Dasylirion glaucophyllum

Euphorbia caducifolia (Red flowers), a rare spurge with thick red stems, spiny branches, and drought resistance