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Hoya carnosa Hoya mindorensis, Sydney, Australia.. Hoya is a genus of over 500 species of plants in the dogbane family, Apocynaceae, commonly known as waxflowers. [2] Plants in the genus Hoya are mostly epiphytic or lithophytic vines, rarely subshrubs, with leathery, fleshy or succulent leaves, shortly tube-shaped or bell-shaped flowers with five horizontally spreading lobes, the flowers in ...
Leaves are generally 1.7–2.2 cm in length and 1.3–1.8 cm in width. Previous to the discovery of Hoya minutiflora, H. bilobata had the smallest recorded flowers of a Hoya. The flower clusters, or umbels, of H. bilobata have light pink petals that spread apart, with the tips curving upwards, to expose their yellow/pink central crowns.
Edema, (also spelled oedema, and named from the analogous disorder in humans and other animals), is a disorder in plants caused by the build-up of water in plant tissues faster than the leaves can transpire. [1] [2] The excess fluid bursts the cell membranes, which can appear as blistery growths, red spots, or small white 'crystals'. [3]
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Hoya carnosa var. compacta. A variant of Hoya, Hoya carnosa var. compacta, is known as the Hindu rope plant, and is characterized by its folded, curled leaves, which grow along vines resembling ropes. The inflorescences of this variant tend to take on a pinkish color.
Hoya australis is a succulent climbing vine to subshrub that typically reaches a height of 4–10 m (13–33 ft). It has fleshy or leathery, elliptic, oblong, egg-shaped or more or less round leaves up to 150 mm (5.9 in) long and 120 mm (4.7 in) wide.
Hoya obscura is a fast-growing, climbing species of Hoya in the dogbane family, Apocynaceae, found in the Philippines. [1] The plant's many aerial roots (which the vine produces along its entire length) will gradually adhere to vertical surfaces nearby, such as buildings, trees or poles, acting as anchors and enabling the plant to receive better sun exposure away from the ground.
In systematic virus infections leaf spots caused by viruses show a loss of green colour in leaves, due to chlorosis which is a repression of chlorophyll development. [1] Leaves may yellow and have a mottled green or yellow appearance, show mosaic (e.g. chlorotic spotting) and ringspots (chlorotic or necrotic rings). [7]