Rhodanthe chlorocephala ( Strawflower )

Fast-growing and erect annual that thrives in poor soil and full sun. Leaves are grayish green and single flowers of white or rosy bracts surround yellow disk florets. Blooms in summer and flowers close in cloudy weather. Susceptible to slug […]

Rhipsalis ( Rhipsalis )

This epiphytic and rock dwelling cacti have aerial roots and branching stems. Some are cylindrical and others are flat or winged. Flowers are funnel-shaped and diurnal. When grown as a houseplant, mist daily and pot in a cactus mix. Bright […]

Rhipidocladum racemiflorum ( Rhipidocladum )

Large bamboo growing to 45 feet tall, stems 1/2 inch in diameter, clumping, found at low to moderate elevations. The thin culms of this species grow up through trees. The culm ends hang down with small bunches of light green […]

Rhipidocladum pittieri ( Rhipidocladum )

Medium to large bamboo growing to 30 feet tall, stems 1/2 inch in diameter, clumping, found at low to moderate elevations. This bamboo grows on moist cliffs in Costa Rica. It has a drooping form that appears curtain-like over canyon […]

Rhexia virginica ( Meadow Beauty )

Tuberous perennial with bristly square stems. Leaves are oval to lance-shaped and light green. Cymes of purple flowers bloom from red buds mid to late summer. Usually found in swampy areas. Susceptible to slug damage. Prefers constantly moist, acidic soil […]

Rheum rhaponticum ( Rhubarb )

The cultivar ‘Giant Cherry’ is a hardy variety especially suitable for cool areas. Rhubarb is a perennial grown from a rhizome that has crinkled leaves and crimson red, edible leaf stalks. Rhubarb needs some winter chill to yield characteristic thick, […]

Rheum rhaponticum ( Crimson Cherry )

Rhubarb is a perennial grown from a rhizome that has crinkled leaves and edible leaf stalks. The stalks of the cultivar ‘Cherry’ are crimson red. Rhubarb needs some winter chill to yield characteristic thick, red stems and does better where […]

Rheum palmatum ( Tanguticum Chinese Rhubarb )

Cultivated for its large, attractive leaves and tall panicles of flowers. This species is perennial and grows from a rhizome, although it also has a huge rootstock. Do not eat leaves. They can be poisonous if ingested. Leaves are palmately […]

Rheum palmatum ( Irish Bronze Chinese Rhubarb )

Irish Bronze is cultivated for its large, attractive leaves and tall panicles of flowers. This species is perennial and grows from a rhizome, although it also has a huge rootstock. Leaves are deeply palmately lobed, broad, round to widely ovate, […]

Rheum palmatum ( Hadspen Crimson Chinese Rhubarb )

Cultivated for its large, attractive leaves and tall panicles of flowers.This species is perennial and grows from a rhizome, although it also has a huge rootstock. Do not eat leaves. They can be poisonous if ingested. Leaves are palmately lobed, […]