Rhizomatous perennial that is slim and upright in habit. Oval leaves have white hairs, are toothed, and medium green. Tubular racemes of flowers are grayish blue, sometimes white, and bloom in summer.
Scutellaria alpina ( Alpine Skullcap )
Perennial that is spreading and tuft-forming with oval, toothed, hairy, grayish green leaves. Racemes of straight purple flowers with yellowish white lips bloom in summer.
Scrophularia auriculata ( Variegated Water Figwort )
Perennial that can be aquatic. Stems are square and straight and produce cream variegated, lance-shaped, wrinkled, toothed leaves. Panicle-like, yellowish green flowers are borne in cymes from early summer to early fall. Fragrance emitted may be malodorous.
Scopolia carniolica ( Scopolia )
Rhizomatous perennial with a creeping habit. Leaves are oval to oblong, pointed, veined, and wrinkled. Bell-shaped, brownish purple to red flowers that are yellowish green inside bloom mid- and late spring.
Scoliopus biglowii ( Stink Pod )
Perennial that is compact and herbaceous. Leaves are broad and oval, boldly veined, and dark green with purple splotches. Umbels of flowers that look like trilliums are upright, and have dark purple inner tepals and greenish white outer tepals with […]
Scleranthus annus ( Knawel )
Small green flowers and narrow, pointed leaves on winter annual weed. Weed common to the Easterm half of the United States. Seed reproduction.
Scirpoides holoschoenus ( Variegated Round-Headed Club-Rush )
Perennial that is tufted and rounded with upright, medium green stems with yellow rings that turn orange to brown in fall. Occasionally, leaves are linear and basal. Umbels of round flower heads made up of brown spikelets on long stalks […]
Scilla violacea ( Bluebell )
Bulbous perennial that is evergreen where hardy. Leaves are lance-shaped, upright, fleshy, light silvery green, and basal with dark green markings above and purple markings beneath. Racemes of bell-shaped, greenish purple flowers bloom in spring and summer. Also known as […]
Scilla socialis ( Bluebell )
Bulbous perennial that is evergreen where hardy. Leaves are lance-shaped, upright, fleshy, light silvery green, and basal with dark green markings above and purple markings beneath. Racemes of bell-shaped, greenish purple flowers bloom in spring and summer. Also known as […]
Scilla siberica ( Spring Squill )
Bulbous perennial with 2 to 4 linear, basal leaves. Loose racemes of pendent, bowl-shaped, bright blue flowers bloom in spring. Good for naturalizing in garden.