Night-flowering Catch-Fly. Silene noctiflora L. Flowers white; seeds dull grayish brown, very slightly flattened, oval or short kidney-shaped, nearly 1.5 mm. across, with 8–10 curved rows of tubercles on each side. Naturalized from Europe.

Fig 70. [Spurry. Spergula arvensis] L.

Spurry. Spergula arvensis L. Flowers white; seeds jet-black, except a narrowly winged, light-colored margin, slightly flattened, circular in outline 1–1.5 mm. across, with a slight notch on one side, surface often sprinkled with delicate, fragile, light-colored prickles. Introduced from Europe. Thriving on poor, sandy land.

Fig 71. [Common Chickweed. Stellaria media] (L.) Cyrill. Alsine media L.

Common Chickweed. Stellaria media (L.) Cyrill. Alsine media L. Flowers white; seeds reddish yellow to dark brown, somewhat flattened, nearly circular, each side covered with 5–6 curved rows of tubercles, giving the appearance of having the two extremities bent together, about 1 mm. in diameter. Introduced from Europe, thriving in cool weather in shade.