(A) Common Chickweed (Stellaria media) (European). Although this is an introduced weed, so hardy and prolific is it that probably it now exceeds in numbers any of our indigenous plants. It grows profusely about dooryards and along roadsides everywhere. The corolla consists of five white, very deeply cleft petals, and the calyx of the same number of larger and longer green sepals. The leaves are ovate, small, opposite, on small stems about the length of the leaves. The plant stem is either simple or branched and ranges from 2 to 10 in. in height.
(B) Long-leaved Stitchwort (S. longifolia) has larger flowers than the last, but the petals are very narrow and so deeply cleft as to appear to be ten in number instead of five. The sepals are nearly but not quite as long as the petals. The stem is weak and usually supported by surrounding grasses or vegetation. The leaves are small, linear, and pointed at both ends. Common everywhere in wet places.
(A) Corn Cockle (Agrostemma githago) (European). The Corn Cockle is very closely related to the [Campions] (genus Lychnis). It is an annual with an erect and rather downy stem; it branches but slightly, each branch being terminated by one or two large handsome magenta flowers with an expanse of one to two inches. The calyx is densely hairy, as are also the lanceolate leaves that grow oppositely on the stem. We find it as an escape from gardens or in waste places near grain fields.
(B) Ragged Robin (Lychnis Flos-cuculi) (European). This species, which is also known as Meadow Lychnis, is noteworthy because of the slashed appearance of its five crimson petals. The flower calyx is deeply ribbed and is of a brownish-purple color, as is also the upper part of the flower stem; both are sticky and hairy. It is sometimes found in waste land or moist places where it has escaped from cultivation.
(A) Bladder Campion (Silene latifolia) (European). We have several Campions, some natives and some introduced. The present species was brought to us from Europe. It has very unusual blossoms, in that the calyx is very inflated, almost globular and handsomely marked with darker green, so as to often give it a very similar appearance to that of the citron melon. The five white petals are cleft in twain for nearly their whole length.
It is a common escape from gardens and may be found blooming from June to August along roads or in dry waste places from Quebec to Minn. and south to Va. and Mo.
(B) Evening Lychnis; White Campion (Lychnis alba) (European). This is another attractive species introduced from Europe. The petals are white, deeply cleft, and crowned at the base with little petal-like divisions; the calyx is inflated and often deep pink on the ribs. The leaves are smooth edged and oppositely on the stem that grows from one to two feet high. Escaped from gardens, from Me. to N. J. and west to Ohio.
