Mammillaria saboae ssp.roczekii

Mamm. roczekii is a larger of M.saboae group. All jf M. saboae are very desired plants in collection, as miniature species with large showy flowers. This pictured plant is a 2 year old seedling, with it's disproportional large first flower.
This species is a bit difficult to germinate, but otherwise straightforward in culture.

Echinocereus scheeri

Echinocereus scheeri is well-known and easy to grow, but by some reason an unpopular cactus. This species was discovered in 1840-s by Potts brothers who were sending plants to Kew gardens on regular basis.
This is a variable species, forming low-growing spiny clumps.

The flower in picture is in the process of opening up, to become filly-open in several hours.

Echinocereus bristolii

Echinocereus bristolii is a compact species very similar in appearance to E. reichenbachii, but with much larger flowers and somewhat larger stems.

Mammillaria albiflora

This large Mammillaria albiflora plant gets completely burred under it's white flowers every spring. Mammillaria albiflora is usually a small plant, but this one is grafted on Trichocereus and shows this uncharacteristic but spectacular habit. 

Mammillaria magnifica

Mammillaria magnifica is a large, taller growing Mammillaria species with long hooked centrals. It branches from the base, slowly developing into impressive clumps. Pink to red flowers show in late spring and usually form a belt around the stem.

Mammillaria hutchisoniana

Mammillaria hutchisoniana is Baja California peninsula species. It is one of the larger-flowered Mammillarias, with characteristic for this group long stigma lobes.

Echinocereus viereckii ssp. morricalii

Echinocereus viereckii ssp. morricalii is one of a few spineless (almost) Echinocerei, with remarkable large and easy produced flowers. This is easy species, suitable for beginner grower.