What is the difference between Sedum sarmentosum and Portulaca oleracea
In courtyard greening and wild plant observation, Sedum sarmentosum and Portulaca oleracea are often confused. Although both plants belong to the succulent herbs, they have significant differences in multiple dimensions. This article systematically compares their characteristics to help readers establish a clear plant identification cognition.
Botanical Classification and Morphological Differences
Family and Genus Origin Comparison
Sedum sarmentosum (Sedum sarmentosum) belongs to the Sedum family, Sedum genus, with a global distribution spanning China, Japan, and South Korea. Its stem has a typical creeping growth form, and the hanging characteristics of the stem can be seen in potted plants.
Portulaca oleracea (Portulaca oleracea) is a representative species of the Portulaca family, Portulaca genus, native to the South Asian subcontinent, and has now become a globally widespread species. Its stem has both prostrate and oblique growth patterns, forming a unique spreading landscape.
Stem and Leaf Morphology Identification
The diameter of Sedum sarmentosum stem is about 1-1.5mm, and the internode length is 2-4cm. The leaves are arranged in a whorled pattern, with an inverted lanceolate structure and a sharp tip, the thickness of the succulent layer is about 0.8mm, and the waxy layer on the leaf surface is evident.
What is the difference between Sedum sarmentosum and Portulaca oleracea
Portulaca oleracea stems can reach 3mm in thickness, with internodes shortened to 1-2cm. Opposite leaves have a typical Portulaca-like outline, with a rounded and slightly concave tip, leaf thickness reaching 1.2mm, and well-developed palisade tissue.
Ecological Characteristics and Cultivation Applications
Growth Environment Preferences
Sedum sarmentosum performs well in areas below 1600 meters in altitude, preferring a semi-shaded and humid environment, with cold resistance up to -10°C. Its root system is developed, making it suitable for rock garden landscaping or vertical greening.
As a C4 plant, Portulaca oleracea grows vigorously under strong light and dry conditions, with the optimal growth temperature being 25-35°C. Its light compensation point is low, making it suitable for extreme environments such as roof greening.
Functional Value Distinction
Sedum sarmentosum contains various flavonoids, used clinically for the辅助 treatment of hepatitis. Its garden application focuses on ornamental value, with the golden leaf variety being particularly popular.
Portulaca oleracea is rich in ω-3 fatty acids, with young stems and leaves used as wild vegetables. Its drought resistance makes it an optimal species for ecological restoration, with a seed germination rate as high as 95%.
Mastering the key points of identification for the two plants can not only improve the effectiveness of horticultural cultivation but also ensure the safety of medicinal and edible uses. It is recommended to confirm the final identification through the observation of flowering periods (Sedum sarmentosum yellow flowers vs. Portulaca oleracea small yellow flowers) to establish a multi-dimensional plant cognitive system.