Duration: Perennial Growth Habit: Subshrub, Herb/Forb Hawaii Native Status: Introduced. Its foliage is evergreen in milder climates. Lipp Common Names: Obedient plant, False dragonhead, Correll's false dragonhead. Common Names: Knotweed, Bistort, Wiregrass, Tear Thumb, Knotgrass, Arssmerte, Mile a Minute, Smokeweed, Swamp Smartweed. They range in colour from pale to bright pink. Pink Knotweed self seeds readily where climate permits (zones 8-9). Native: Northern America. The growing patterns, leaf structures, interior stem, and pink flowers set this plant apart. Japanese knotweed may be more effective than antibiotics at tackling Lyme disease, new study has found. Plant Name. A selection of variegated leaf forms are also available. Height: 2 to 135 inches (5 to 350 cm).Vines may grow up to 100 feet (30 M). Leaves are a thin triangle between 4 and 8 inches long. Green or reddish, simple oval, lance-shaped or elliptic leaves. Flowering Period: Early summer to autumn. Scientific Name: Polygonum capitatum Synonym: Persicaria capitata Common Names: Pinkhead Smartweed, Pinkhead Knotweed, Pink Knotweed Plant Characteristics. Upwards of 50 species of annuals and perennials grow in … One of the most invasive weeds in the world, Japanese knotweed is native to Asia, where it is regarded as having medicinal value. Many forms turn red or bronze in autumn. Bohemian knotweed (figures 4 and 5) is a hybrid of Japanese knotweed and giant knotweed and has characteristics of both parents. Growing Region: Zones 3 to 9. Common Names: Knotweed Foliage: Deciduous. Lesser knotweed is shorter than Japanese knotweed, growing approximately 1.5m tall. Individual flowers are much bigger than those of Japanese knotweed and are clearly bell-shaped. Plant database entry for Pink Knotweed (Persicaria capitata) with 13 images and 38 data details. Unlike the other species, the Himalayan knotweed grows close to the ground, aiding in its dense nature. Physostegia Growing and Care Guide. Life Cycle: Hardy perennial. Spikes of flowers. Himalayan knotweed (figure 6) grows to 6 feet tall. Flowers: Middle of summer through to early autumn. Height: 12 to 72 inches (30—210 cm). Polygonum Plant Growing and Care Guide. Flowers: Vertical, long-lasting heads of small red, white or pink flowers, on spikes or panicles. Stems and flowers are similar to those of other knotweed species, though flowers are occasion-ally pink. Tubular. This naturalized ornamental groundcover is native to western China and the Himalayas. It was introduced to North America in the 1870s as an ornamental and forage plant. The genus was segregated from Polygonum. Native to China and the Himalayas, this plant is a member of the buckwheat or dock family. Life Cycle: Half hardy annual, hardy annual.Half hardy perennial, hardy perennial. Pink Knotweed (Persicaria capitata) - Garden.org New and Unread Tree-Mails Growing Persicaria (Bisort, Knotweed) Latin Name Pronunciation: per-si-kar'-ee-ah Members of this genus are sometimes included in Polygonum (known to many gardeners through the unwelcome guest called Knotweed). The flowers on Himalayan Knotweed have a pink hue, which distinguishes them from the pure white of Japanese Knotweed’s. Sometimes streaked. It has a cosmopolitan distribution, with species occurring nearly worldwide. Flower Details: Pink, purple. Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae.Plants of the genus are known commonly as knotweeds: 436 or smartweeds. Native: Temperate regions of Europe and Asia. 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