Varieties of cacti

Cacti are not the most common indoor plants, and until recently it was very difficult to find reliable information regarding their species. Meanwhile, if even before the acquisition to find out the generic name of the cactus, you can immediately understand whether it is suitable for cultivation. In the family of cacti more than 3 tons of species, and taxonomists divide them into 3 subfamilies, which differ in their structure.

Pereskievye


This family is distinguished by round stems and flat leaves, in the leaf axils there are many spines, hard and straight. Flowers solitary, on pedicels, sometimes make up inflorescences. Many pereskievyh edible fruits, and the seeds are often black, with a thin and fragile shell. This subfamily consists of 3 genera, 30 species, 20 of which have normally developed leaves.
The genus Pereskiya has 8 species and 4 species, and all of them are bush cacti. Most often in greenhouses can be found peresyu prickly and its varieties, in which the lower sides of the leaves are red or purple.
The genus Rhodocactus is common in Mexico, it is known about 13 of its species, which also grow in South America and India. Most of its varieties in room culture develop poorly and most often do not bloom, for this reason, rhodocactuses are used for grafting zigocactus and other flowering plants on them.

Opuntia


The majority of representatives of opuntium leaves are small, juicy and fast-falling. In addition to the spines, there are bunches of small, jagged setae, glochidia, which are modified leaves of the prickly pear, in the areoles of prickly pear. Other subfamilies do not have such a detail. Opuntia stems are succulent and jointed, and in different species, the segments are different in shape: as lozenges, cylindrical, potato-shaped, thickened. The flowers are solitary, large, of the correct form and of the most varied color, but yellow is predominant. The majority of the Opuntia fruits also have edible fruits, and the seeds have a very hard shell and a light prisemya. Opuntia include 16 genera and more than 500 species.

Cereus


This is the largest subfamily of cacti plants in which there are no leaves and glochidia. Cacti in it are various, giant and dwarf.The shape of the stem and its structure can also be diverse, there are Cereus serpentine, cylindrical, spherical, candle-shaped, hilly or with papillae. Spines are of most species, some fruits are edible. The seeds have a fragile shell and prisemyannik.
Most Cereus are desert cacti and grow in arid areas, but some of them are found in tropical forests and are epiphytic plants that love a very humid and warm climate. This selenitsereus and hilotsereus.

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