1. Family: Boraginaceae Juss.
    1. Genus: Heliotropium Tourn. ex L.
      1. Heliotropium eremogenum I.M.Johnst.

        This species is accepted, and its native range is Chile (Antofagasta).

    [KBu]

    Luebert, F. 2013. A revision of Heliotropium sect. Cochranea (Heliotropiaceae). Kew Bulletin 68: 1. DOI https://doi.org/10.1007/s12225-013-9432-6

    Type
    Type: Región de Antofagasta, Prov. Antofagasta, Antofagasta, 29 Oct. 1930, F. Jaffuel 1120 (holotype GH).
    Habit
    Decumbent shrubs, 0.1 – 0.3 m tall, with ascending branches, densely foliose to the base of the inflorescence
    Stem
    Stems and foliage strigose
    Leaves
    Leaves alternate, solitary or grouped in fascicles of up to 5 leaves, sessile, linear-oblaceolate or linear-elliptic, 2 – 6.5 × 1 – 2 mm; lamina strigose, green or greyish-green, margin entire, revolute, base attenuate, apex acute, with only the main vein conspicuous
    Inflorescences
    Inflorescences terminal, elongate, dichotomously branched, congested, to c. 3 cm long
    Flowers
    Flowers sessile, alternate, erect
    Calyx
    Calyx cylindrical, green or brownish-green; calyx lobes linear, free, strigose outside, glabrous or strigose within, (1 –) 2.5 – 3.5 (− 4.5) × 0.5 – 0.7 mm, free portion 2.5 – 3.5 mm long, apex acute
    Corolla
    Corolla infundibuliform, sparsely strigose, white with yellow throat; limb horizontally spreading, 5 – 7 mm wide, lobes rounded; tube longer than the calyx, 4.5 – 6 mm long
    Stamens
    Stamens included or exserted at late anthesis; filaments adnate to petals; anthers oblong-lanceolate, glabrous, base cordate, apex acute, 1.5 – 2 mm long, above the apex of or overlapping the stigmatic head
    Ovary
    Ovary glabrous, subglobose, c. 0.6 mm diam., with a basal nectar ring
    Style
    Style glabrous, c. 1.5 – 2.5 mm long, longer than the stigmatic head
    Stigma
    Stigmatic head conic, elongate, bilobate, c. 1 – 2 × 0.7 mm
    Fruits
    Fruits dry, ellipsoid, smooth or rugose, glabrous, brown, c. 1.5 × 1 mm diam., falling apart at maturity into two 2-seeded nutlets, c. 0.7 × 1 mm diam.
    Pollen
    Pollen prolate, 21.5 – 24.8 × 11.3 – 12 μm (from Luebert & García 2575/969, BSB)
    Distribution
    Endemic to the coastal range of the area of Antofagasta (Cerro Moreno – La Chimba, 23°28'S – 23°39’S, province of Antofagasta, Región de Antofagasta, Chile), with two isolated stations in the surroundings of Tocopilla (22°3'S, province of Tocopilla, Región de Antofagasta, Chile) and Iquique (20°13'S – 20°22'S, province of Iquique, Región de Tarapacá, Chile) (Map 14). The locality of the collection of Kuschel s.n. (Putre) is very doubtful. A search of the database of SGO showed that Kuschel actually collected in La Chimba just before his trip to Putre. It is therefore very likely that this specimen was erroneously labelled.
    Ecology
    Coastal hills, on rocky slopes of the fog zone in a very arid area, between 100 – 1,020 m, where several years without rain are common. All materials from Tocopilla and Iquique are fragmentary, probably due to long periods of aridity. The vegetation corresponds to a desert scrub dominated by Ephedra breana (Ephedraceae), Euplychnia iquiquensis (Cactaceae) and Nolana peruviana (Gaudich.) I. M. Johnst. (Solanaceae) (Johnston 1929; Luebert et al. 2007).
    Conservation
    Critically endangered (CR), according to the criterion of extent of occurrence (B1(a,c), IUCN 2001). This species is known from three localities (Cerro Moreno-La Chimba) in a zone under extreme interannual climatic fluctuations that affect the number of mature individuals. The area of La Chimba is currently subject to the disturbance effects of urban expansion associated with the development of the city of Antofagasta. Cerro Moreno has recently (in 2010) been put under official protection by the Chilean government.
    Phenology

    September to November.

    Note

    The epithet eremogenum probably refers to the very arid areas where this species grows.

    The closest relative of this species seems to be Heliotropium philippianum. It is also morphologically similar and phylogenetically related to H. floridum and H. linariifolium. See discussion under these species.

    Distribution

    Native to:

    Chile North

    Heliotropium eremogenum I.M.Johnst. appears in other Kew resources:

    First published in J. Arnold Arbor. 18: 20 (1937)

    Accepted by

    • Luebert, F. (2013). A revision of Heliotropium sect. Cochranea (Heliotropiaceae) Kew Bulletin 68: 1-54. Royal Botanic Gardens, Kew.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348. Missouri Botanical Garden.

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    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0