The often branching stalk is leafy above the first branch, though bare below, and grows from 6 to 24 inches in height according to its opportunities; it is slender but of a woody, tough fibre, and smooth; gray-green in color. The narrow small leaf, with its tapering base, is only occasionally notched, and is of a dusty-green color. The leaves are set on the stalk alternately, and in little groups. The very tiny unnoticeable flower has 4 thin, white petals, and 2 little stamens; the green calyx is barely visible. The flowers are set on thread stems, in loose, stiff, club-shaped and long clusters. The most important feature of this plant is the seed; as the bloom moves upward it leaves behind a long stretch of maturing seed-pods, like little flat discs with a tiny notch at the top; a pungent flavor belongs to these pods, which is found acceptable by the cosmopolitan palate of childhood. [Illustration: PEPPERGRASS: Lepidium Virginicum.] ROCK-ROSE FAMILY. CISTACEÆ. *Rock-Rose.* _Helianthemum Canadense._ *Frost Weed.* Found in bloom during June on dry open hillsides and pastures. The slightly branching, leafy stalk, which grows from 12 to 15 inches high, is woody-fibred, and slender, and rough to the touch with short stiff hairs; it is red or tawny in color. The long narrow oval leaf is pointed at both ends; its edge is slightly rolled under, and the ribs are prominent and rough beneath; the texture is strong-fibred, and the surface is rough; its green is tawny. The leaves are set on short stems, with a pair of wings (“stipules”) at the junction with the stalk, and occur alternately. The 5-petaled flower is shaped like a shallow cup of very fine and thin texture and a clear vigorous yellow color, which is in good harmony with the many orange-tipped stamens; the 5-pointed calyx is hairy, and its green is toned with tawny. A very individual trait of this flower is the fact that the stamens almost always gather together to one side of the pistil, lying flat upon a petal, caused by the rude touch of a passing insect, it is said, so sensitive is this charming plant,--a quality further manifested by the swift fall of its petals if plucked. The flower never lasts more than a single day, and but few blossoms are borne on a plant. This is the first flowering of the Rock-Rose; though ripening the seeds now formed, there comes a second bloom in the fall whose blossoms are very small, with few or no petals, clustered in the angles of the leaves, and bearing but a few seeds. “Generally called ‘Beauties of the Sun’ by the ancients,--‘Sun-roses’ by the English folk.” [Illustration: ROCK-ROSE: Helianthemum Canadense.] VIOLET FAMILY. VIOLACEÆ. *Sweet White Violet.* _Viola blanda._ Found in swamps, by roadside runnels, and in moist meadows, in April. The leaves and flowers, on stems 4 or 5 inches in height, grow from the root.