Plant ID
GD-CAC-004-0027
Identification Status: Provisional identification based on the submitted photograph.
Common Name(s)
Mamma Kikko Astrophytum
Kikko Star Cactus
Tortoise-Shell Astrophytum
Star Cactus
The cultivar name ‘Mamma Kikko’ refers to the unusual rounded tubercles into which the ribs are divided. The “Kikko” group is associated with a tortoise-shell-like appearance.
Plant Photograph
Photograph: Green Desert Botanical Library specimen photograph.
Picture Description
The photograph shows a remarkable Astrophytum asterias cultivar with a highly unusual, sculptural body. Instead of forming continuous ribs, the plant’s ribs are divided into numerous rounded, raised tubercles, producing a strongly textured appearance.
The epidermis is gray-green to olive-green and is heavily decorated with fine white scales. Woolly, cream-colored areoles are positioned at the tips of the tubercles.
A prominent pale yellow flower with an orange-red throat emerges from the center of the plant. The combination of the unusual tuberculated body, dense white markings, woolly areoles, and characteristic yellow-red flower makes this specimen particularly distinctive.
Plant Description
Astrophytum asterias is a small, spineless cactus native to southern Texas and northeastern Mexico. The species normally develops a flattened, rounded body with prominent ribs and woolly areoles.
The cultivar ‘Mamma Kikko’ is a highly specialized horticultural form in which the ribs become almost completely divided into rounded, breast-like tubercles. This produces an unusual three-dimensional surface pattern that resembles a tortoise shell when viewed from above.
The specimen photographed displays this characteristic strongly. Its numerous rounded tubercles, dense white scaling, and absence of spines make it especially valuable as a collector’s specimen.
Basic Information
Scientific name: Astrophytum asterias
Kingdom: Plantae
Phylum: Streptophyta
Class: Equisetopsida
Order: Caryophyllales
Family: Cactaceae
Genus: Astrophytum
Species: Astrophytum asterias
Cultivar: ‘Mamma Kikko’
Plant Type: Cactus / succulent
Growth Form: Flattened, globular to slightly raised
Spines: Absent
Native Species Range: Southern Texas to northeastern Mexico
Cultivar Origin: Horticultural / nursery-produced cultivar
Kew recognizes Astrophytum asterias as an accepted species, with a native range extending from southern Texas into the Mexican states of Nuevo León and Tamaulipas.
Plant Overview
Astrophytum asterias is one of the most distinctive small cacti of the genus Astrophytum. Its natural form is generally low-growing and flattened, with eight ribs, woolly areoles, and no spines.
‘Mamma Kikko’ represents a remarkable horticultural expression of the species. Its ribs become divided into prominent rounded tubercles, giving the plant an almost sculpted appearance.
The cultivar is especially admired by cactus collectors because each specimen can develop its own arrangement, size, and density of tubercles. Published descriptions note that the tubercles become more pronounced as the plant matures.
Botanical Description
Growth Habit
A solitary, slow-growing cactus with a flattened to globular body. In ‘Mamma Kikko’, the normal ribs are strongly modified and become divided into numerous rounded tubercles.
The plant is generally low-growing rather than strongly columnar.
Mature Size
The species Astrophytum asterias generally remains relatively small. Descriptions of ‘Mamma Kikko’ report mature bodies approximately 8–16 cm in diameter and about 2–6 cm in height, although cultivated specimens can vary.
Stem
The stem is fleshy, green to olive-green and covered with tiny whitish scales.
In ‘Mamma Kikko’, the stem surface is dramatically modified into rounded, raised tubercles. These tubercles interrupt the normal continuity of the ribs and create the cultivar’s characteristic geometric, three-dimensional appearance.
Leaves
True leaves are absent.
The fleshy stem performs photosynthesis and stores water, allowing the plant to survive periods of environmental dryness.
Spines
Spines are absent.
This is characteristic of Astrophytum asterias. The plant instead possesses woolly areoles that provide one of its principal identifying features.
Roots
The plant develops a root system adapted to dry environments and intermittent moisture.
The roots require a porous, rapidly draining growing medium because prolonged wetness can lead to root damage and rot.
Flowers
Flowers are produced from the growing point and are typically yellow with an orange-red throat.
The flower in the photograph clearly displays this characteristic color combination. Descriptions of ‘Mamma Kikko’ report yellow flowers with a red throat and flowering primarily during spring and summer.
Fruits
Following successful pollination, the flower develops into a small fruit containing numerous seeds.
Fruit production is dependent on successful pollination and appropriate growing conditions.
Seeds
Seeds are small and provide the primary method of propagation for Astrophytum asterias.
Seed-grown plants may display considerable variation, particularly in ornamental characteristics.
Native Habitat
Geographic Distribution
The species Astrophytum asterias is native to southern Texas and northeastern Mexico, particularly the Mexican states of Nuevo León and Tamaulipas.
The ‘Mamma Kikko’ form itself is a cultivated horticultural form, rather than a naturally occurring wild population.
Natural Ecosystem
The parent species grows primarily in desert and dry shrubland environments. Kew classifies it as a succulent subshrub associated primarily with dryland habitats.
The natural form is adapted to environments where periods of moisture are followed by dry conditions.
Climate
The species is adapted to warm, sunny, seasonally dry conditions.
Its natural environment experiences periods when water is limited, making its succulent body and efficient water storage important survival adaptations.
Cultivation & Care
Light
Provide bright light to full sun.
Plants grown under shade should be gradually acclimatized to intense sunlight to prevent sunburn.
For highly ornamental cultivars such as ‘Mamma Kikko’, strong light is particularly important for maintaining compact, healthy growth.
Watering
Water thoroughly during active growth, then allow the growing medium to dry before watering again.
Reduce watering significantly during cool or dormant periods.
Avoid frequent light watering that keeps the root zone continually damp.
Soil
Use a very porous, mineral-rich cactus medium with excellent drainage.
Suitable components include pumice, lava rock, coarse sand, perlite, and other materials that prevent compaction.
Temperature
Provide warm growing conditions with good air circulation.
Protect the plant from prolonged cold, especially when the soil is wet.
Fertilization
Feed lightly during active growth using a diluted fertilizer formulated for cacti and succulents.
Avoid excessive nitrogen, which can encourage soft growth and reduce the compact character of the plant.
Drainage
Excellent drainage is essential.
Use a pot with adequate drainage holes and never allow the plant to remain in standing water.
Propagation
Astrophytum asterias is primarily propagated by seed.
Seed Propagation
- Use fresh, viable seeds.
- Sow them on a sterile, porous cactus propagation medium.
- Keep the medium lightly moist during germination.
- Provide warmth and bright filtered light.
- Maintain good ventilation.
- Avoid prolonged saturation.
- Gradually reduce moisture as seedlings become established.
- Transplant carefully when the young plants are sufficiently developed.
Because ‘Mamma Kikko’ is a distinctive cultivated form, seed-grown offspring may not necessarily reproduce the exact appearance of the parent. Selected clones are therefore particularly valued by collectors.
Interesting Facts
- Astrophytum asterias is naturally spineless.
- The species has a naturally flattened, star-like appearance.
- ‘Mamma Kikko’ is distinguished by its ribs becoming divided into prominent rounded tubercles.
- The tuberculated surface can resemble a tortoise shell when viewed from above.
- The cultivar’s appearance becomes more pronounced as the plant matures.
- The flowers are typically yellow with a reddish-orange throat, creating a striking contrast with the gray-green body.
- Astrophytum asterias is classified as Vulnerable (VU) on the IUCN assessment cited by Kew, highlighting the importance of responsible conservation and cultivation.
- The genus Astrophytum currently contains six accepted species according to Kew.
Life’s Whisper
🌵 “There is beauty in becoming uniquely yourself.”
This cactus does not follow the ordinary path.
Its ribs do not remain straight.
Its surface does not remain smooth.
Instead, each part transforms into something unusual, creating a pattern that could never be mistaken for another plant.
What may look strange at first becomes fascinating when we take the time to understand it.
Perhaps life is like that too.
We are not all meant to grow in the same shape.
Some journeys are straight.
Others are wonderfully irregular.
And sometimes, the very things that make us different are the things that make our story worth discovering.
Life’s whisper:
Do not be afraid of the shape your journey is taking. Your uniqueness may be your greatest wonder.
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References
For the complete list of botanical references, scientific literature, and online resources used in preparing the Green Desert Botanical Library, please visit the References page available from the Main Menu.
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