1. Family: Boraginaceae Juss.
    1. Genus: Heliotropium Tourn. ex L.
      1. Heliotropium myosotifolium (DC.) Reiche

        This species is accepted, and its native range is N. Chile.

    [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: Chile, Coquimbo, [barren and stony hills between Huasco and Copiapó], [Sept. 1841], T. Bridges 1338 (holotype G-DC [photo SGO 11767]; isotypes BM [photo GH], E not seen digital photograph), G, GH, K [photo SGO 2262], P not seen [digital photograph, fragm. F 515813, photo MSB], W).
    Habit
    Erect shrubs, 0.1 – 0.5 m tall, with ascending thin branches, densely foliose to the base of the inflorescence
    Stem
    Stems and foliage strigose or villous, usually densely so, non-glutinous
    Leaves
    Leaves alternate, solitary or grouped in fascicles of up to 10 leaves, sessile, linear to oblong-linear, 5 – 20 (− 30) × 0.7 – 2.5 (− 4) mm; lamina strigose or villous, greyish or brownish-green, margin entire, revolute, base attenuate, apex obtuse, with only the main vein conspicuous
    Inflorescences
    Inflorescences terminal, elongate, dichotomously branched, to c. 5 cm long
    Flowers
    Flowers sessile, alternate, erect, aromatic. Calyx cylindrical, green or greyish-green; calyx lobes linear, glutinous, fused only at the base or free, strigose on both sides, 2 – 5 × 0.5 – 0.7 mm, free portion 2 – 3 mm long, apex acute
    Corolla
    Corolla infundibuliform, sparsely strigose, dull white with yellow throat; limb horizontally spreading, 5 – 7 (− 8) mm wide, lobes rounded; tube as long as the calyx, 3 – 5 mm long
    Stamens
    Stamens included or exserted at late anthesis; filaments adnate to petals; anthers oblong-lanceolate, glabrous, base cordate, apex acute, c. 1 mm long, overlapping the stigmatic head
    Ovary
    Ovary glabrous, subglobose, 0.5 – 1 mm diam., with a basal nectar ring
    Style
    Style glabrous, c. 0.2 – 0.5 mm long, shorter than the stigmatic head
    Stigma
    Stigmatic head conic, elongated, bilobate, c. 1.3 – 2.2 × 0.7 mm
    Fruits
    Fruits dry, ellipsoid, rugose, glabrous, dark brown, falling apart at maturity into two 2-seeded nutlets
    Pollen
    Colpiferous sides almost parallel (from Ricardi & Marticorena 4393/788 in Marticorena 1968) Pollen prolate, 22 – 23 × 11.5 – 14.5 μm Amb 6-lobate Endoapertures 2.5 μm diam. Exine thickness 1 μm at the mesocolpia and 1.5 μm at the apocolpia
    Distribution
    Inland pampa of the provinces of Copiapó and Huasco, Región de Atacama, Chile, largely restricted to the plains located between the cities of Vallenar and Copiapó, between 27°30'S and 29°9'S (Map 10). The locality given in the collection of Albert s.n. (‘Quinteros’, Región de Valparaíso, Chile) is certainly erroneous.
    Ecology
    Dry inland sandy plains, subject to rain-shadow effects of the coastal mountains, 170 – 700 (− 1500) m. These areas are largely devoid of vegetation during dry years, but both woody and herbaceous plants emerge in the spring of rainy years giving rise to the so-called blooming desert. The vegetation of these areas has been studied by Kohler (1967, 1968). It consists of a scrub dominated by Atriplex deserticola Phil. (Amaranthaceae) and Skytanthus acutus Meyen (Apocynaceae), with a dense layer of ephemeral plants, such as Nolana baccata Dunal (Solanaceae) and Cistanthe longiscapa (Barnéoud) Carolin ex Hershk. (Portulacaceae), where Heliotropium myosotifolium is usually scarce.
    Conservation
    Least concern (LC), see Luebert (2010).
    Phenology

    September to October.

    Vernacular
    Palo negro (Spanish).
    Note

    This species is very similar to Heliotropium chenopodiaceum (see discussion under the latter species).

    It has also sometimes been confounded with Heliotropium floridum, from which it is easily distinguished by its style shorter than the stigmatic head (vs style longer than the stigmatic head in H. floridum). The latter species has the leaves more succulent than H. myosotifolium, and is distributed west of the range of H. myosotifolium, closer to the coast.

    The epithet myosotifolium refers to its leaves similar to some species of the genus Myosotis L. (Boraginaceae).

    [KBu]
    Use
    Riedemann et al. (2006) suggest its potential use as an ornamental.

    Images

    Distribution

    Native to:

    Chile North

    Heliotropium myosotifolium (DC.) Reiche appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 2008 s.coll. [s.n.], Chile K000583545
    Jan 1, 2008 s.coll. [s.n.], Atacama K000583547 isotype
    Jan 1, 2008 s.coll. [s.n.], Chile K000583548 isotype
    Jan 1, 2008 Lobb [440], Chile K000583544 holotype
    Bridges [1338], Chile K000583546 isotype

    First published in Fl. Chile 5: 201 (1910)

    Accepted by

    • 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.

    Literature

    Kew Bulletin
    • Förther (1998: 208)
    • Marticorena (1968: 45)
    • Johnston (1928b: 31)
    • (1907: 2431910: 201)
    Kew Backbone Distributions
    • Luebert, F. (2013). A revision of Heliotropium sect. Cochranea (Heliotropiaceae) Kew Bulletin 68: 1-54. Royal Botanic Gardens, Kew.

    Sources

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    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