Reproducing only by seed.
Branching and softly hairy, up to 1m long, spreading or erect.
Alternate (1 per node), ovate to nearly triangular with a dull green to gray-green colour. The leaves are finely hairy, especially along margins and main veins (Figure 4). Some of the leaf hairs have tiny glandular tips (seen under magnification), giving the plant a slightly sticky or clammy texture. Margins of leaves typically smooth (Figure 4) but occasionally with coarse, irregular, rounded teeth.
Inflorescence of 3-9 flowers in a short raceme sticking out from the side of the stem rather than from the axil of a leaf. The corolla is typically white but can be tinged with bluish-purple color (Figure 3). The calyx at first is small but enlarging with age to 4-9mm across at maturity and acting as a cup around the lower half (stem end) of the fruit. The fruit is a greenish berry turning yellowish-brown to brown at maturity. Flowers from July to October.
A native of South America, Hairy nightshade is found in southern Ontario in cultivated fields on both mineral and muck soils.
It is distinguished by its relatively small, thick, non-translucent leaves, its finely hairy stem and leaves that are slightly sticky or clammy and its fruit being green but then turning yellowish-brown to brown at maturity.
Hairy nightshade. A. Plant. B. Cluster of flowers.