1. Family: Cactaceae Juss.
    1. Genus: Echinocereus Engelm.
      1. Echinocereus stramineus (Engelm.) Haage

        Echinocereus stramineus is an impressively spiny cactus found growing in clumps on rocky slopes in Mexico and the USA. The large, attractive pink flowers are followed by edible, strawberry-flavoured fruits, which have given rise to common names such as 'strawberry pitaya' and 'spiny strawberry cactus'.

    [KSP]
    General Description
    The densely-spined strawberry cactus is known for its hedgehog-like appearance and strawberry-flavoured fruits.

    Echinocereus stramineus is an impressively spiny cactus found growing in clumps on rocky slopes in Mexico and the USA. The large, attractive pink flowers are followed by edible, strawberry-flavoured fruits, which have given rise to common names such as 'strawberry pitaya' and 'spiny strawberry cactus'.

    Species Profile

    Geography and distribution

    The spiny strawberry cactus is found in Mexico in the states of Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí and Zacatecas, and in the USA in New Mexico and Texas. Echinocereus stramineus occurs at 600 to 1,600 metres above sea level.

    Description

    Echinocereus stramineus is a low-growing cactus with dense clusters of stems covered in long white to straw-coloured spines, bearing large magenta flowers followed by edible strawberry-flavoured fruits.

    The plant is densely branched at the base, clumping to form hemispherical mounds of up to 500 stems, reaching a metre or more in diameter. The individual stems are up to 45 cm long and 8 cm in diameter near the base, tapering gradually towards the tip. There are 10 to 17 stem ribs, which are somewhat tuberculate (knobbly). Areoles (spine clusters) are 7 to 15 mm apart on the ribs, and are white and woolly at first. The spines are straw-coloured, glassy white or pinkish. There are two to four central spines, which are each up to 8.7 cm long. There are seven to 14 radial spines, which are each up to 3 cm long.

    The flowers are broadly funnel-shaped, and up to 12.5 cm long and wide. The flowers are a lively magenta, and are made up of numerous perianth-segments (rings of non-fertile petal-like parts surrounding the fertile organs). The flowers are up to 6 cm long and 12.5 cm broad. The pericarpel (ovary immersed in floral stem tissue) bears scales with glassy white spines of up to 3 cm long in their axils. The stamens are up to 1 cm long, with purplish red filaments and yellow anthers. The style is reddish and up to 2.7 cm long and 2.5 mm thick. The style opens up at the tip into 10 to 13, 8 mm long deep green stigma-lobes.

    The fruit are spheres of about 5 cm diameter and are spiny until ripe. Upon ripening the fruit lose their spines and turn red, aromatic and very fleshy. These edible fruits taste of strawberries and contain blackish seeds of up to 1.5 mm diameter.

    Threats and conservation

    Echinocereus stramineus is in the IUCN (International Union for Conservation of Nature) category of Least Concern, but is potentially threatened by trampling from grazing animals or mining of the rocks upon which it grows, though neither of these threats is likely to be significant over its entire range.

    Uses

    The edible, strawberry-flavoured fruits are sometimes collected from wild populations. The fruits can be eaten raw or made into jellies.

    Cultivation

    In temperate regions Echinocereus species such as this require cultivation under glass in full sun, but with ample ventilation. They are best grown in a broad shallow pot, to allow the clustering branches sufficient lateral spread. They should be planted in well-draining largely mineral compost and watered from April until September whenever the compost has dried out. A cool winter rest is essential if flower-buds are to be produced the following spring. If dehydrated, the plant can withstand temperatures down to 0 °C during this winter rest. Flowering on plants less than 30 cm in diameter is uncommon.

    Propagation can be achieved by detached branches, which can be rooted when placed upon a sandy substrate, following adequate healing of any cut surfaces in a dry airy place. Echinocereus stramineus can also be raised from seed in the manner of other small-seeded cacti. The seeds should be sown on the surface of finely sieved compost and placed under a glass or transparent plastic cover in a temperature of 20 °C.

    Strawberry cactus at Kew

    Echinocereus stramineus is likely to be exhibited in Kew's Princess of Wales Conservatory if it flowers in spring-summer.

    Distribution
    Mexico, USA
    Ecology
    Rocky slopes in the Chihuahuan Desert of northern Mexico and south-west USA.
    Conservation
    Provisionally assessed as IUCN category of Least Concern.
    Hazards

    None other than mild physical injury from contact with the spiny stems.

    Images

    Distribution

    Found In:

    Mexico Northeast, Mexico Southwest, New Mexico, Texas

    Common Names

    English
    Strawberry cactus

    Echinocereus stramineus (Engelm.) Haage appears in other Kew resources:

    First published in Verz. Cact. 1876: 8 (1867)

    Literature

    • [1] (2016) Revista Mexicana de Biodiversidad
    • [2] Hunt, D.R., Taylor, N.P. & Charles, G. (2006). The New Cactus Lexicon, 2 vols.
    • [3] Anderson, E.F. (2001). The Cactus Family: 249.
    • [4] Taylor, N.P. (1988). Supplementary notes on Mexican Echinocereus (1). Bradleya 6: 65 - 84.
    • [5] Taylor, N.P. (1985). The Genus Echinocereus: 88 - 90.

    Sources

    International Plant Names Index
    The International Plant Names Index (2016). Published on the Internet http://www.ipni.org
    [A] © Copyright 2016 International Plant Names Index. https://creativecommons.org/licenses/by/3.0

    Kew Species Profiles
    Kew Species Profiles
    [B] http://creativecommons.org/licenses/by-nc-sa/3.0
    [C]

    World Checklist of Selected Plant Families
    World Checklist of Selected Plant Families(2016). Published on the Internet http://apps.kew.org/wcsp/
    [D] See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement. http://creativecommons.org/licenses/by-nc-sa/3.0
    [E] © Copyright 2016 International Plant Names Index and World Checkist of Selected Plant Families. https://creativecommons.org/licenses/by/3.0