Description
Ferocactus latispinus var. flavispinus f. cristatus is a nice crested form of the yellow spined variety of Ferocactus latispinus.
Habit: The standard Ferocactus latispinus var. flavispinusis a modest-sized ball-shaped or flat-topped barrel cactus, which normally remains a solitary plant, without dividing or producing offsets.
Crested stem: Fan-shaped, spreadiing up to 45 (or more) cm. The crests are of variable width depending on growing conditions, grafted plant tend to have thinner crest with juvenile traits and spines, while plant grown on their own roots tend, with time, to enlarge producing beautiful specimens with broader stems armoured with stronger mature yellow hooked spines.
Ribs: Sharp and prominent.
Areoles: Large, grey to blackish.
Central spines: 4 large, large, of which the lowest one is conspicuously wider, thick and flat, apically bent downward and hooked up to 4 cm long and lie flat against the body. This prominent spine is yellow coloured. The other central spines are still stout, but much narrower and not curved. Younger specimens have only thinner and shorter needle-like spines, never flattened or hooked.
Radial spines: 6-12 up to 2,5 cm long, spreading out, smaller, translucent yellow straight that have almost no width at all.
Flowers: Beautiful “glassy” straw-yellow (or pink-purple), up to 6 cm long and 3 cm broad.
Blooming time: Late autumn to early winter, usually in October
Origin and Habitat
Garden origin (Nursery produced cultivar)
Cultivation and Propagation
It is not too difficult in a greenhouse, although grows quite slowly. It is usually seen as a grafted plant but can grow on its own roots too.
Soil: Use a mineral well permeable soil with little organic matter (peat, humus).
Exposure: They need a good amount of light shade to full sun this help to keep the plants healthy, although slow growth.
Watering: Water sparingly from March till October (weekly during summertime, if the weather is sunny enough), with a little fertilizer added. Less or no water during cold winter months, or when night temperatures remain below 10° to prevent root loss. It is sensitive to overwatering (rot prone).
Fertilization: Feeding may not be necessary at all if the compost is fresh then, feed in summer only if the plant hasn’t been repotted recently. Do not feed the plants from September onwards as this can cause lush growth which can be fatal during the darker cold months.
Hardiness: Keep perfectly dry in winter at temperatures from 5 to 15 degrees centigrade. (but it is relatively cold resistant and hardy to -5° C, or possibly colder for short periods) In the rest period no high atmospheric humidity!! (Temperature Zone: USDA 9-11)
Crested growth: Unlike ‘monstrose’ varieties of plants, where the variation from normal growth is due to genetic mutation, crested growth can occur on normal plants. Sometimes it’s due to variances in light intensity, or damage, but generally the causes are unknown. A crested plant may have some areas growing normally, and a cresting plant that looks like a brain, may revert to normal growth for no apparent reason. If you have any of the crested part left you need to remove the normal growth and leave the crested part behind this will need to be done regularly.
Propagation: Grafting or cuttings. Plants are usually grafted onto column-shaped cacti but proved to be able to produce their own roots if degrafted. Cuttings will take root in a minimum temperature of 20° C (but better in hot weather). Cuttings of healthy shoots can be taken in the spring and summer. Cut the stem with a sharp, sterile knife, leave the cutting in a warm, dry place for a week or weeks (depending on how thick the cutting is) until a callus forms over the wound. Once the callus forms, the cutting may be inserted in a container filled with firmed cactus potting mix topped with a surface layer of coarse grit. They should be placed in the coarse grit only; this prevents the cut end from becoming too wet and allows the roots to penetrate the rich compost underneath. The cuttings should root in 2 to 6 weeks. Large crested piece must be placed on the soil surface without burying the plant base down in the soil.
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