Lycium ciliatum is an upright, woody shrub native to the dry plains and valleys of Bolivia and northern to central Argentina, growing between 1.6 and 2 meters tall. Its specific epithet ciliatum means "fringed with fine hairs" in Latin, pointing to the delicate, eyelash-like tufts of hairs along its floral structures and the enlarged bases of its stamen filaments.
The species was formally described in 1832 by the German botanist Diederich Franz Leonhard von Schlechtendal in the journal Linnaea and belongs to the nightshade family (Solanaceae). In botanical literature it has also been recorded under the synonym Lycium argentinum, and molecular studies place it in section Schistocalyx alongside its close relative Lycium chilense.
Lycium ciliatum forms a branching, erect shrub reaching 1.6 to 2 meters in height. Its leaves vary considerably in size and surface texture depending on local moisture conditions, ranging from completely smooth (glabrous) to finely pubescent.
The hermaphroditic blossoms are usually five-parted, or occasionally six-parted, with a bell-shaped calyx and a flaring, funnel-shaped corolla (the fused ring of petals) colored white to creamy off-white. The calyx tube is short, measuring 1.5 to 2.5 mm, while its elongated calyx lobes extend 4 to 8.5 mm.
Following pollination, the ovary develops into a globose to ovoid berry that ripens to a vivid red or bright orange. Each berry measures 5 to 8 mm in both length and width and encloses 15 to 35 small seeds per carpel.
Growing across the sun-baked, wind-swept expanses of the Gran Chaco and Monte regions of Argentina and Bolivia, Lycium ciliatum must protect its precious floral nectar from evaporating into the dry air before pollinators arrive. Its solution lies in the very feature that gave the plant its scientific name: the dense fringe of hairs (cilia) surrounding the swollen bases of the stamen filaments.
Inside the short, 3 to 6 mm funnel-shaped corolla tube, these enlarged, hairy stamen bases press closely together just above the nectar-secreting tissue. Together, they weave a miniature fibrous barrier across the throat of the blossom that acts as both a climate shield and a selective gatekeeper.
Taxon Synonyms: Lycium ignarum, Lycium chilense var. meyeri, Lycium schickendantzii, Lycium ciliatum var. latifolium, Lycium ciliatum var. heteromorphum, Lycium erosum, Lycium ciliatum var. saltense, Lycium ciliatum var. cordobense, Salpichroa ciliata, Withania pulvinata
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