# # # SPECIAL PLANT # # # (Selected specimen)
Diameter 8 cm. This distinctive variety has recently been introduced and is a real prize, as it has few or no spines.
Family: Cactaceae(Cactus Family)
Scientific name: Ferocactus glaucescens (DC.) Britton & Rose
forma nuda (inermis)
Origin: Garden origin (Nursery produced cultivar)
Conservation status: Listed in CITES appendix 2.
Common Name: Blue Barrel Cactus
Ferocactus glaucescens var. nuda
This distinctive variety has recently been introduced and is a real prize as it has few or no spines.
Description: Solitary or basally suckering, barrel cactus. Multiple heads are produced as the plant ages and can form a very large mound.
Stems: Glaucous grey, up to 55 cm in height, 50 cm in diameter. Globular depressed at the apex, it becomes shortly columnar as it ages.
Ribs: 11 to 15
Spines: Absent or very few (1 to 3 not distinguishable from radials to centrals) irregularly scattered on the areoles of young individuals.
Flowers: Lemon yellow, funnel-shaped, 3-4 cm in diameter. The tepals are oblong, lanceolate, silky, shining; the margins are finely fringed. Stamen, style and stigma are yellow. Stigma lobes: 12-15.
Blooming season: Late spring and summer. The flowers last a very long time. The plants start flowering when about 13cm in diameter.
Fruit: White, 2 cm long with the remnants of the flowers attached.
Cultivation: Plants are slow-growing to start, but they are easy to grow and require little care once they have reached a nice flowering size. F. glaucescens is suited for any rich, well drained soil in full sun throughout the year. Pot culture: it grows best in a fairly roomy, well-drained container filled with a porous cactus soil mixture that doesn't contain too much humus. To insure robust plants, water and fertilize during the aestival growth cycle; this plant need plenty of water (indicatively, about once a week). But it's necessary to avoid wetting the bodies of these plants while they are in sunlight. A wet cactus in the sun light can cause sun burning, which can lead to scars or even fungal infections and death. In winter keep it completely dry at 10°C. This usually aids in maintaining a healthier plant, but can tolerate sporadic light frost.
Reproduction: Cuttings (if available) made from pieces of the stem of any size can be detached and laid aside for a few days to allow a protective "skin" to form over the cut. They can then be planted in pots. Place them in a spot where they'll receive sun, and do not water until the soil becomes fairly dry. After a while the soil can be moistened regularly but never kept constantly saturated.