Found throughout North America, these native annuals produce thousands of hard-coated seeds. NameThatPlant.net currently features 3816 plants and 23,855 images. metabolites of both flowers and leaves of Persicaria hydropiper, Persicaria maculosa and Persicaria minor, three species which occur in the same habitat, were compared. Stems. Life Cycle. Native to California CNPS rare plants Not native to California Affinity to serpentine soil Cal-IPC invasive plants Polygonum persicaria L. syn. The alternate … Persicaria maculosa Knotweed family (Polygonaceae) Description: This plant is a summer annual that is ½–2' tall and more or less erect, although individual plants may sprawl. For many plants, the website displays maps showing physiographic provinces within the Carolinas and Georgia where the plant has been documented. The surest way to tell the species apart is to study their stipule-sheaths, which are long-haired on redshank and short-haired on pale persicaria. Persicaria maculosa (syn. Persicaria maculosa, Spotted Lady's-thumb, Heart's-ease. introduced annual, reproducing by seed. Identification Notes. View plant photos, descriptions, maps, treatment options, and more. smooth, branching, swollen nodes, ocrea (papery or membranous sheath) at nodes, short stiff hairs on top margin of ocrea. Spotted Lady's Thumb (Persicaria maculosa) Posted by keithp2012. The Atlas of Florida Plants provides a source of information for the distribution of plants within the state and taxonomic information. It is widespread across Eurasia from Iceland south to Portugal and east to Japan. Cotyledons seedlings are elliptic to lanceolate in outline, with hairs along the margins. Polygonum persicaria) is an annual plant in the buckwheat family, Polygonaceae.Common names include lady's thumb, spotted lady's thumb, Jesusplant, and redshank. Identification: A summer annual weed of horticultural, agronomic, and nursery crops that may reach 3.5 feet in height. The website also provides access to a database and images of herbarium specimens found at the University of South Florida and other herbaria. Smartweed (Polygonum pensylvanicum) and closely related lady's thumb (P. persicaria) are a shade gardener's worst nightmare, because they grow best in moist partial shade. The stems are usually light green, round, and glabrous or slightly pubescent. The list of references for all nonindigenous occurrences of Persicaria maculosa are found here. Persicaria maculosa. Redshank looks a lot like pale persicaria (P. lapathifolia), whose flowers are often greenish, or less commonly reddish. Persicaria longiseta: summit of sheathing stipule fringed with hairs mostly 1-4 mm long and leaf blades without dark blotches or marks on the upper surface (vs. P. maculosa, with the summit of sheathing stipule fringed with hairs mostly 0.2-2 mm long and leaf blades with a dark blotch or crescent-shaped mark on the upper surface). Leaves. 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