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A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [1] Symptoms can overlap across causal agents, however ...
Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of ascomycete fungi in the order Erysiphales. Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive. Infected plants display white powdery spots ...
Hibiscus[2][3] is a genus of flowering plants in the mallow family, Malvaceae. The genus is quite large, comprising several hundred species that are native to warm temperate, subtropical and tropical regions throughout the world. Member species are renowned for their large, showy flowers and those species are commonly known simply as "hibiscus ...
Tree and leaves. Hibiscus × rosa-sinensis is a bushy, evergreen shrub or small tree growing 2.5–5 m (8–16 ft) tall and 1.5–3 m (5–10 ft) wide. The plant has a branched taproot. Its stem is aerial, erect, green, cylindrical, and branched. Its leaves are simple and petiolate, with alternate phyllotaxy. The leaf shape is ovate while the ...
H. coccineus is a herbaceous perennial (it dies back during the winter) and grows 6–8 ft (1.8–2.4 m) tall. [4] The palmately compound leaves are 5–6 in (13–15 cm) wide, [5] and look much like those of the hemp plant, Cannabis sativa. It features bright scarlet flowers that have five petals and are reminiscent of hollyhock. [5]
Species: H. mutabilis. Binomial name. Hibiscus mutabilis. L. Hibiscus mutabilis, also known as the Confederate rose, Dixie rosemallow, cotton rose or cotton rosemallow, is a plant long cultivated for its showy flowers. Originally native to southern China, [1] it is now found on all continents except Antarctica.
Hibiscus syriacus is a hardy deciduous shrub. It is upright and vase-shaped, reaching 2–4 m (7–13 feet) in height, bearing large trumpet-shaped flowers with prominent yellow-tipped white stamens. [12] The flowers are often pink in color, but can also be dark pink (almost purple), light pink or white. Individual flowers are short-lived ...
Hibiscus kokio Hillebr., kokiʻo or kokiʻo ʻula ("red kokiʻo ") is a shrub or small tree (3–7 m or 9.8–23.0 ft) with red to orangish (or rarely yellow) flowers. This endemic species is not officially listed, but considered rare in nature. Two subspecies are recognized: H. kokio ssp. kokio found in dry to wet forests on Kauai, Oahu, Maui ...