Solanum dolichorhachis Bitter
  • "Bitter and Bitter, Repert. Spec. Nov. Regni Veg. 11: 490. 1913., 1913."

Cite taxon page as 'WFO (2020): Solanum dolichorhachis Bitter. Published on the Internet; Accessed on: 25 Oct 2020'

General Information

Scandent shrub or liana, climbing to 8 m or more. Stems slender, wiry-woody, glabrous to moderately pubescent with trichomes 0.1–0.2 mm long, these frequently in distinct lines along stem.
Sympodial units plurifoliate.
Leaves simple, the arrangement distichous, the blades 4.4–11 x 1.3–4.5 cm, 2–3 times as long as wide, ovate to elliptical, chartaceous to coriaceous to somewhat fleshy, glabrous to moderately pubescent on the midvein adaxially, glabrous abaxially; venation pinnate, with ca. 5 pairs of secondary veins, the veins sand-punctate; base oblique, sides of the lamina 3–4 mm distant on the petiole, the two sides rounded to truncate to somewhat cordate; margins entire; apex acuminate; petioles 0.2–0.6 cm, moderately pubescent adaxially, sand-punctate. Internodes 0.7–2.8 cm.
Inflorescences 3–55 cm long, unbranched, terminal to extra-axillary to nearly leaf-opposed, with 14–116 flowers (scars), the axes slender, densely pubescent; peduncle 2–5 cm; rachis 2–49 cm; pedicels 5–6 mm in flower, slender, 13–14 mm in fruit, glabrous to minutely pubescent, spaced 1.5–8 mm apart.
Flowers 5-merous, all perfect. Calyx 1.5–2 mm long, membranous, very sparsely pubescent, sand-punctate, the tube ca. 1 mm long, the lobes 0.5–1 x ca. 2 mm, broadly rounded, rounded to shortly acuminate at tips; fruiting calyx not accrescent. Corolla 0.7–1 cm in diameter, 3–5 mm long, stellate, membranous, white to greenish-white, the lobes 3–4.5 x 1.5–2 mm, lanceolate, acute at tips, reflexed at maturity, glabrous adaxially, pubescent along center of petal abaxially, the margins ciliate. Stamens with filaments 0.5-1 mm long, glabrous; anthers ca. 2.5 x 1 mm. Ovary glabrous; style 3–4 x ca. 0.3 mm, clavate, glabrous; stigma capitate.
Fruit a berry (only immature seen), 9–18 x 4–6 cm, 2–3 times as long as wide, spindle-shaped to possibly cordate, pointed at apex, the color unknown, glabrous.
Seeds unknown.

  • Provided by: [D]
    • Distribution

      Solanum dolichorhachis occurs in the Pacific and Amazonian lowlands of Ecuador and in the Amazonian lowlands of Peru; 50–350 m in elevation.

    • Provided by: [D]
      • Conservation

        According to the IUCN Red List Categories (IUCN 2010), S. dolichorhachis is classified as B1a+biii (Critically Endangered). This species is only known from five widely scattered locations, two of which are in western Ecuador, an area that continues to experience extreme habitat degradation (Dodson and Gentry 1991). The location at Limoncocha is in the center of an oil field, continued development of which is encroaching on all sides of the 4,600 ha Reserva Biológica Limoncocha (E. J. Tepe, pers. obs.). 

      • Provided by: [D]
        •   Bibliography

          • 1 Bitter and Bitter, “Repert. Spec. Nov. Regni Veg. 11: 490. 1913.”, 1913.

           Information From

          International Union for Conservation of Nature

          IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
          • A All Rights Reserved
          International Union for Conservation of Nature v.3

          IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
          • B See IUCN Terms and conditions of use

          PBI Solanum Project. 2017. Solanaceae Source. Jan.31st, 2015.
          • C All Rights Reserved
          • D
          • E CC0 1.0 Universal (CC0 1.0).
          World Flora Online consortium

          World Flora Online Data. 2018.
          • F CC0 1.0 Universal (CC0 1.0).