Drooping Lily of the Valley Vine (Salpichroa dependens)

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Salpichroa dependens: trailing trumpet-flowered shrub of the Peruvian Andes

Salpichroa dependens is a scrambling, woody-based shrub or liana native to the high mountain valleys and rocky ravines of the Peruvian Andes. Its specific epithet dependens—Latin for hanging down or suspended—describes both its lax, trailing branches that drape over boulders and shrubs and its long, pendulous, trumpet-like blossoms.

A member of the nightshade family (Solanaceae), this species was first described in 1837 by the British botanist William Jackson Hooker under the name Atropa dependens, based on specimens collected in Peru by Andrew Mathews. In 1845, John Miers transferred it to the newly established genus Salpichroa, a name derived from the Greek words salpinx (trumpet) and chroa (complexion or color).

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms (Core angiosperms)
  • ∟ eudicots
  • ∟ core eudicots
  • ∟ asterids
  • ∟ order Solanales
  • ∟ family Solanaceae
  • ∟ genus Salpichroa
  • ∟ species Salpichroa dependens (Drooping Lily of the Valley Vine)

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Morphology

Stems and leaves

Rather than standing upright on a heavy trunk, Salpichroa dependens develops long, flexible, sarmentose stems that lean on surrounding vegetation or cascade down steep Andean cliffs. The twigs are slender and often slightly flexuous, bearing small leaves at regular intervals.

  • Foliage arrangement: Leaves often emerge in unequal pairs from the same node, a classic structural hallmark found across many genera of the nightshade family.
  • Leaf shape: The blades are ovate to ovate-oblong with smooth margins, rounded or tapering bases, and short, slender petioles.

Flowers and fruits

Solitary flowers hang gracefully from the leaf axils on long, thread-like stalks (pedicels). The blossoms are tailored for high-elevation nectar feeders.

  • Calyx and corolla: A deeply five-parted calyx with narrow, linear-lanceolate lobes supports a long, tubular-funnelform yellowish or greenish-cream corolla that flares into five short, reflexed lobes at the mouth.
  • Berry: Following pollination, the ovary ripens into an oblong to ovoid fleshy berry filled with small, compressed seeds.

Interesting facts

Trumpets tuned for Andean hummingbirds

High in the Peruvian Andes, cold mountain air makes flight energetically expensive for small insects, leaving hummingbirds as the most reliable long-distance pollinators. Salpichroa dependens is built to partner with these feathered acrobats across steep, rocky terrain.

Every detail of the plant's growth and floral geometry works together to make pollination effortless for a hovering bird:

  • Scrambling architecture: Instead of investing massive energy into thick, self-supporting wood at high altitude, the plant drapes its lax stems over existing shrubs and rock ledges, suspending its flowers out in the open airspace where hummingbirds can hover unimpeded by tangled twigs.
  • Precision floral tube: The long, narrow, hanging corolla tube matches the length and curvature of an Andean hummingbird's bill, ensuring that as the bird probes the base of the trumpet for sugar-rich nectar, its forehead or bill brushes directly against the anthers and stigma.

Geography of distribution

  • Peru

Sources

Technical Information

Taxon Synonyms: Atropa dependens

External Databases: GBIF, POWO, Tropicos

See also