Appearance
It is an annual, self-compatible herb that forms a tumbleweed. Individual plants reach 1–1.5 m tall, have once or twice pinnatified leaves, and abundant spines on the stems and leaves. It produces yellow flowers with pentagonal corollas 2–3.5 cm in diameter and weakly bilaterally symmetric. In its native range "S. rostratum" is pollinated by medium- to large-sized bees including bumblebees."Solanum rostratum" flowers exhibit heteranthery, i.e. they bear two sets of anthers of unequal size, possibly distinct colouration, and divergence in ecological function between pollination and feeding. The fruit, a berry, is enclosed by a prickly calyx. The seeds are released when the berries dry and dehisce while still attached to the plant.
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