Aylostera pseudodeminuta var. schumanniana (Backeb.) Backeb. 

🌱 Morphology

  Small cactus, initially growing solitarily and tending to produce offsets with age, forming compact groups. The stems are green, initially globose and becoming somewhat cylindrical as they develop, with tubercles arranged in a spiral. The areoles are small and have very little wool.

Its most striking feature is the combination of two types of radial spines: about 10–12 bristly, thin and flexible ones, up to about 8 mm, accompanied by another six more robust, rigid and extended ones, which can reach 1–1.4 cm. The latter have a yellowish hue at the base and brown in their upper half. It also develops around two central spines, similar in appearance and with yellow and brown tones. The whole creates an irregular, slightly intertwined thorny covering, which distinguishes this form from other populations of Aylostera pseudodeminuta.

The flowers emerge from the basal area of the stems, as is usual in the genus. They are reddish to orange tones and contrast with the green body and dense spines. Flowering occurs mainly during spring, and may repeat in successive waves if the growing conditions are favorable.

🌍 Distribution, habitat and family

This variety was described from plants originating from the north of Argentina, in the province of Salta, where Backeberg indicated an approximate altitude of 3,500 m. The species Aylostera pseudodeminuta is associated with mountainous environments in northwestern Argentina, in open terrain and slopes of the Andes, where it alternates high sun exposure, seasonal rains and cold nights.

Family: Cactaceae · Subfamily: Cactoideae · Tribe: Trichocereeae.

The name schumanniana honors the German botanist Karl Moritz Schumann, a prominent student of cacti. The variety was published by Curt Backeberg and has been maintained in the specialized literature as a form recognizable by its particular spine pattern.

☀️ Lighting

It needs very intense lighting to maintain compact growth and develop dense and well-formed spines. A sunny exposure is recommended, with gradual acclimatization when moved from shaded conditions. As a reference, it can be grown with an approximate PAR DLI of 18–25 mol·m⁻²·day⁻¹, adjusting it to the available temperature and ventilation.

💧 Growth cycle and watering

Winter dormancy. During the cold months, it should be kept practically dry, especially if grown at low temperatures. Growth resumes in spring, when watering can be gradually resumed. During spring and summer, it is recommended to water thoroughly and let the substrate dry out completely before repeating. It is essential to avoid waterlogging and maintain good ventilation.

🌡️ Temperature · USDA Zone 8b

It tolerates minimum temperatures of approximately −7 °C in dry conditions, with the substrate completely dry and good protection from ambient humidity. It is not recommended to subject it to prolonged frosts or low temperatures when the substrate is moist.

🪨 Substrate and nutrition

It needs a very well-draining, airy substrate with a high proportion of mineral components. During active growth, Desert CHOICE® Cactaceae NPK (Ca-Mg) 4-4-7 (4-4) is recommended. Assimilable calcium promotes the formation of firm tissues and the maintenance of turgidity, while magnesium participates in chlorophyll synthesis.

🪴 DesertSTORE presentation

It is grown in a 9x9 cm gourmet black pot, with Desert SOIL substrate and biological activation using mycorrhizal fungi and biofungicides.

This is an inimitable xerophyte grown in Madrid in a technological square pot and with the substrate activated with mycorrhizal fungi and biofungicides.