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Seed erect.—A perennial herb, with alternate palmately-lobed leaves, and corymbose white flowers.

Spiraea.—Vigorous growing plants of great beauty, preferring good, deep, rather moist soil; the flowers small but very abundant, in large corymbose or spicate panicles.

The flowers are individually large and corymbose, and are succeeded by small green fruit.

L. Dràba, L. Perennial, obscurely hoary; leaves oval or oblong, the upper with broad clasping auricles; flowers corymbose; pods heart-shaped, wingless, thickish, entire, tipped with a conspicuous style.—Astoria, near New York, D. C.

Scales well imbricated, coriaceous, with short herbaceous mostly obtuse spreading tips; pappus of rigid bristles; stem-leaves all sessile, none heart-shaped or clasping; heads few, or when several corymbose, large and showy.