=Larger Mouse-ear Chickweed.= _Cerastium vulgatum_ L. Flowers white; pods cylindrical; seeds light-reddish yellow to dark reddish brown; slightly flattened, 4-sided, 2 of them straight, converging, one rounded, the other narrow and notched. Some of them ovoid, others nearly circular, covered with a few irregularly curved rows of tubercles, .4-.8 mm. in diameter. In large part introduced from Europe, though a native of this continent. [Illustration: Fig. 64.] =Bouncing Bet. Soapwort.= _Saponaria officinalis_ L. Flowers white; seeds dark lead-color, flattened, short-kidney-shaped to circular with notch on one side, 2 mm. across, more or less, with 6-7 curved rows of short, shiny tubercles. Naturalized from Europe, delighting in sandy soil. [Illustration: Fig. 65.] =Cow-herb.= _Saponaria Vaccaria_ L. Seed dull, jet-black, slightly roughened by great numbers of minute points, nearly spherical, 2.3 mm. in diameter. An annual very troublesome in spring wheat. Introduced from Europe. [Illustration: Fig. 66.] =Sleepy Catch-Fly.= _Silene antirrhina_ L. Flowers pink; seeds lead-color, slightly flattened, circular to short-kidney-shaped, each side covered with 5-6 curved rows of pointed tubercles giving the appearance of having two blunt extremities bent together, .5-.7 mm. across. Compare seeds with those of _Arenaria_ above described. When in flower, two of the upper internodes are glutinous. Only found on thin soil. [Illustration: Fig. 67.] =Forked Catch-fly.= _Silene dichotoma_ Ehrh. Seeds reddish-brown, flattened, the three sides and the corners rounded, thickest at one corner narrowing to the side opposite; seed scar in the middle of the narrow side, four curved rows of tubercles on either side of the seed extending to the scar, diameter 1.3 mm., the thick edge concave, containing 6-7 rows of tubercles. [Illustration: Fig. 68.] =Bladder Campion.= _Silene latifolia_ (Mill.) Britton & Randle. _Silene_ (Moench) Garcke. Flowers white; pod covered by an inflated calyx, seeds dull grayish brown, flattened, wedge-shaped, oval or 3-sided, 1-1.7 mm. across, 5-7 curved rows or tubercles on each side. Naturalized from Europe. [Illustration: Fig. 69.] =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. [Illustration: Fig. 70.] =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. [Illustration: Fig. 71.]