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Once on the leaves, the spores germinate and penetrate through the stoma. [2] The subsequent infection causes chlorosis of the leaves in localized yellow spots. As the season continues into summer, apothecia begin to form, giving rise to brown-black leaf lesions that resemble spots of tar. [2] Leaves retain their yellow border from the initial ...
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
Anthurium is a genus of herbs often growing as epiphytes on other plants. Some are terrestrial. The leaves are often clustered and are variable in shape. The inflorescence bears small flowers which are perfect, containing male and female structures. The flowers are contained in close together spirals on the spadix. The spadix is often elongated ...
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, causing the appearance of growths, particularly on the underside of leaves. [3]
Anthurium andraeanum is a flowering plant species in the family Araceae that is native to Colombia and Ecuador. [1] It is a winner of the Royal Horticultural Society 's Award of Garden Merit . [ 2 ]
This is a list of Anthurium species, a superdiverse genus of flowering plants from the arum family . [1] There are known to be at least 1,000 described species. [ 2 ]
For example, the "flower" of the well known Anthurium spp. is a typical spadix with a large colorful spathe. [1] In this type of inflorescence, peduncle is thick, long and fleshy, having small sessile unisexual flowers covered with one or more large green or colourful bracts (spathe).
Pachyneurium is a section within the genus Anthurium. It is the largest section, containing the "bird's nest" Anthuriums. Plants of the section are terrestrial, with a rosette growth habit of dense, deeply rooted stems, and long lanceolate to oblanceolate leaves. Leaves are borne on short petioles and often have waved margins. The most notable ...