Cactus
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Agave_victoria-reginae

Agave victoria-reginae
Queen Victoria century plant, royal agave

An elegant domed rosette of short broad leaves, strikingly edged and patterned in white, led to this species' early popularity in cultivation. Young plants have stiff leaves, but on older plants the tips curve inwards to form a ball. Cream flowers appear after 20-30 years when the slow-growing plant is 60-90 cm (2-3 ft) in diameter. Some forms offset freely; others remain solitary.

H 30 cm (12 in), S 60 cm (2ft). Min. 2°C (36°F).

Source from: The Complete Book of Cacti & Succulents
 
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aeonium_arboreum_1

Aeonuim arboreum or albovariegatum

The botanical species A. arboreum is distributed in coastal areas of Morocco, Portugal and Spain, but it extends also far into the Mediterranean region, occurring on most of its islands. The colourful cultivars are decorative plants and their cultivation is easy. They tolerate regular watering, a nourishing compost and minimum winter temperatures 6 - 10°C.

Source from: The Illustrated Encyclopedia of Cacti & Other Succulents
aeonium_arboreum

Aeonuim arboreum or atropurpureum

The leaves of this cultivar are dark purple-red. They take on an intense colouration when in full sunlight.

Source from: The Illustrated Encyclopedia of Cacti & Other Succulents
 
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Ariocarpus kotschoubeyanus

Is the smallest member of the genus. It frequents fine, flat clay-sandy sediments or gravel mixed with clayey sand. The tuberculate rosettes measure 5 to 7 cm. A white-flowered variety occurs in Mecixo in Tamaulipas, while the varieties from central Mexico, from the states of San luis Potosí and Querétaro, have carmine blossoms.

Ariocarpus_kotschoubeyanus
Source from: The Illustrated Encyclopedia of Cacti & Other Succulents
Ariocarpus_trigonus

Ariocarpus trigonus

Has a flattened, bright green body composed of numerous tubercles. Unlike the preceding species, the epidermis has a flash green colouration and the flowers are yellow, in larger specimens growing around the outer edge of the top of the plant body. In the wild, this cactus grows under shrubs protected from the sun, but in cultivation, it also requires warmth and careful watering.

Source from: The Illustrated Encyclopedia of Cacti & Other Succulents
 
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astrophytum_asterias

Astrophytum asterias

Astrophytum asterias is the most bizarre species of the genus, the flat ribs with scattered flakes and felted areoles resembling the skeletons of sea-urchins. In its mode of growth it is more like Ariocarpus: it remains half-hidden underground, with only tip of the crown emerging, hardly distinguished from its surroundings. The centre of its distributtion is in eastern and northern Mexico, ranging to the south of Texas. It frequents scrubland on gravel sediments with fine clay. In summer, It can become overgrown by grass. The flowera are produced throughout summer: they are yellow with a red throat. Apart from A. coahuilense, it is the least straightforward species to grow.

Source from: The Illustrated Encyclopedia of Cacti & Other Succulents

Astrophytum capricorne

Similarly to the closely related A. senile, even small plants are capable of the flowering; the flowers are red throated, the spines are long, soft and bent upward. Both species come from northern Mexico, growing there on limestone together with succulents of rosette form and bushes (matorrals), either exposed to the sun or in semi-shade, protected by vegetation. Several varieties of A. capricorne are distinguished, differing in the shaping of ribs, setting of spines and colour of flowers.

Astrophytum__capricorne
Source from: The Illustrated Encyclopedia of Cacti & Other Succulents
Astrophytum_myriostigma

Astrophytum myriostigma

Bisop's cap, bishop's mitre, monk's hood
This species is prized for a look that is distinctly uncommon among cacti. Initially squat, it is the size of a small melon when about ten years old. Yes bare body may be green,blue or purple, with 4 - 8 ribs, and eventually becomes slightly columnar. The speckled look is due to innumerable white scales, which are in fact rudimentary spines. Large plants readily bear blooms that are 6 cm ( 2 1/2 in ) across and last 2 - 3 days.
H 15 cm (6 in), S 20 cm (8 in). Min 5°C (41°F).

Source from: The Complete Book of Cacti & Succulents

Astrophytum ornatum

The fastest-growing and largest Astrophytum, this variable species bears many large flowers after 5 - 6 years. The ribs, usually flecked with silver and with mostly pale curving spines, spiral towards the crown.
H 1.2 m (4 ft), S 20 cm (8 in). Min 7°C (45°F).

Astrophytum_Ornatum
Source from: The Complete Book of Cacti & Succulents
 
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