Disocactus flagelliformis

This cactus has been in cultivation for really long  time. It was described by Linnaeus in 1753 as Cactus flagellliformis, and was a favorite in collections since that time. It can be successfully grown under common house plant culture, and freely blooms with its bright flowers. The species originates from Oaxaca state, Mexico.

Ferocactus macrodiscus

Ferocactus macrodiscus is another spring bloomer. It is the smallest flowering Ferocactus species with pretty candy-striped flowers. Like other Ferocacti it is easy in culture but needs plenty of light and better grown in greenhouse or, climate permitting, outside. As the name implies, with age it becomes wide and flat.

Sclerocactus parviflorus

Sclerocactus is a genus that is considered to be notoriously difficult in culture, and plants are usually grown on graft. Proper stock allows plants look more or less naturally and often supports earlier and more proliferus flowering. My preferred stock for them is Opuntia humifusa.
If grown on own roots the natural cycle must be considered, with dry summers and wet winters. Larger plants are actually pretty robust, and in California climate do better if in winter kept outside of the greenhouse.

Matucana aureiflora

This nice plant becomes more and more popular in collections. It is easy to grow and flower, and surely pretty.
This is the only Matucata with "normal", that is not asymmetrical hamming bird pollinated flower. Plants are flat-globular, becoming fairly large in time.

Pelecyphora strobiliformis

This unusual Mammillaria relative is well known but rare in collections, mainly due to slow growth. The species name refers to pine cone that the plant stem resembles with some imagination. Flowers are easily produced once plant riches the proper size.

Opuntia polyacantha

Opuntia polyacantha is likely the most widespread Opuntia species in USA. These frost and drought tolerant plants range from California to Texas and way north.
This pink-flowered form grows in Beaver Dam mountains, on Utah-Nevada-Arizona border. This area sees snow over winter and not much summer rains. The flowering period for this cactus is spring, when plants plum with water supply from winter snow and rains.

Opuntia basilaris, Joshua Tree NP

Showy pink flowers of O.basilaris are always a pleasant sight. It is one of the iconic plants of Mojave desert and adjacent arid lands, wide spread and common. The low plants are frost hardy and in culture require watering in late winter and spring to successfully produce blooms.
Flower buds are always produced at pad edges, usually close to the tip, and new segments develop from the pad base. That helps to recognize early the successful flower initiation .

This is post 200 of the Cactus aficionado blog.