Origin and Habitat: Mexico (Coahuila, Chihuahua, Durango).

• Stenocactus lloydii (Britton & Rose) A.Berger
• Brittonrosea lloydii (Britton & Rose) Speg.
• Echinocactus lloydii A.Berger
• Echinofossulocactus lloydii Britton & Rose
• Echinofossulocactus multicostatus f. lloydii (Britton & Rose) P.V.Heath
• Efossus lloydii (Britton & Rose) Orcutt

• Stenocactus multicostatus (Hildm. ex K.Schum.) A.Berger
• Brittonrosea multicostata (Hildm. ex Schum.) Speg.
• Echinocactus multicostatus Hildm.
• Echinofossulocactus multicostatus (Hildm. ex K.Schum.) Britton & Rose
• Echinofossulocactus zacatecasensis var. moranensis Bravo
• Efossus multicostatus (Hildm. ex Schum.) Orcutt
• Stenocactus erectocentrus hort.
• Echinofossulocactus erectocentrus Backeb.
• Stenocactus lloydii (Britton & Rose) A.Berger
• Brittonrosea lloydii (Britton & Rose) Speg.
• Echinocactus lloydii A.Berger
• Echinofossulocactus lloydii Britton & Rose
• Echinofossulocactus multicostatus f. lloydii (Britton & Rose) P.V.Heath
• Efossus lloydii (Britton & Rose) Orcutt
• Stenocactus multicostatus f.ma ( Coll. Šnicer ) (Hildm. ex K.Schum.) A.Berger
• Stenocactus multicostatus subs. zacatecasensis (Britton & Rose) U.Guzmán & Vázq.-Ben.
• Brittonrosea zacatecasensis Speg.
• Echinocactus zacatecasensis A.Berger
• Echinofossulocactus multicostatus var. zacatecasensis (Britton & Rose) Lodé
• Echinofossulocactus multicostatus f. zacatecasensis (Britton & Rose) P.V.Heath
• Echinofossulocactus zacatecasensis Britton & Rose
• Efossus zacatecasensis
• Stenocactus zacatecasensis (Britton & Rose) A.Berger
• Stenocactus zacatecasensis var. longispinus A.Berger
• Stenocactus zacatecasensis var. moranensis Bravo

• Stenocactus multicostatus f. cristatus hort.
• Echinofossulocactus multicostatus f. cristatus hort.

• Stenocactus multicostatus f. monstruosus hort.
• Echinofossulocactus multicostatus f. monstruosus hort.

Description: Stenocactus lloydiiSN|1730]]SN|1731]] (Echinofossulocactus lloydiiSN|1732]]SN|1732]]) is one of the many forms of the extremely variable Stenocactus multicostatusSN|1731]]SN|1730]] with (usually) characteristic long white to dark red papery spines and multiple, very tight, thin and wavy ribs. Flowers varies from white to purple and are almost concealed among the spines, however "lloydii" and "multicostatus" are considered part of a multiform species, where each form is linked to others by populations of plants with intermediate characteristics. In accordance with the variability of the species the "lloydii" subspecies is invalid and nowadays considered as a synonym.
Stems: Solitary, globose, vivid green with a flat tops 8-15 cm wide and up to 7-20 cm tall, typically with 50 to 100 multiple, very tight, thin, wavy ribs
Areoles: Areoles are covered with white felt in young plants,
Spines: 6 to 9 radial spines, the upper ones are longer whit a central stout and flat erected spine up to 7cm long, while the lower ones are shorter and point downwards. The spines are different lengths.
Flowers: The blooms are white, pink or purple with a violet to darker purple midvien.
Blooming season: Early spring, and occasionally during the growing season through autumn.
Remarks: They are commonly called wave or brain cacti because of their crinkly appearance.

Bibliography: Major references and further lectures
1) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
2) James Cullen, Sabina G. Knees, H. Suzanne Cubey “The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass”} Cambridge University Press, 11/Aug/2011
3) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. “The New Cactus Lexicon” dh books, 2006

Cultivation and Propagation: Small growing and easy to to care and flower. Because of it’s small size makes a great potted plant specimen, great for beginning collectors.
Growth rate: It is a slow growing species.
Soil: It grows well in a very draining mineral potting substrate, but it isn't picky about soil.
Repotting: Use pot with good drainage. Eventually, as they become mature, they attain a maximum size of 8-10 cm (20) cm. However, old plants become senile and have a tendency to succumb to disease and a weak root system. At this stage, as is well known, they die suddenly. So, after they reach 10 cm in diameter grow them slowly, and adopt a new repotting period, using intervals of every 2 - 3 years. Additionally grow them under drier conditions or with stronger sunlight.
Watering: During the summer it enjoys average watering, but do not overwater (It rots easily, especially if over wet) allow to dry between watering. Watering should be curtailed during the winter months..
Fertilization: Feed with a high potassium fertilizer in summer.
Hardiness: When dormant, the plant is very cold tolerant (down to nearly -5° C or less), but when left out it is more sensitive to frost.
Exposure: They do need a lot of light to develop their typical spination, but different clones vary in their tolerance of full sunshine. However some protection in light shade is recommended during the hottest hours in summer.
Uses: It is an excellent plant for container growing. It always looks good and stays small. It looks fine in a cold greenhouse and frame.
Rot: Rot it is only a minor problem with cacti if the plants are watered and “aired” correctly. If they are not, fungicides won't help all that much.
Propagation: Seeds (usually), remembering that seedlings dislike strong light and dry conditions and need to be repotted frequently, or by the shoots of adult plants (if available). If you remove an offset, remember to let it dry for some days, letting the wound heal (cuttings planted too soon easily rot before they can grow roots). Lay it on the soil and insert the stem end partially into the substrate. Try to keep the cutting somewhat upright so that the roots are able to grow downward.