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It is one of the most common viruses affecting cultivated orchids, perhaps second only to the Cymbidium mosaic virus. [1] It causes spots on leaves and colored streaks on flowers. [1] If a plant is also infected with the Cymbidium mosaic virus, it can lead to a condition called blossom brown necrotic streak. [1]
Moth orchids, also called phalaenopsis orchids, which are commonly sold by florists and big box stores, can last for a couple of months, says Justin Kondrat, lead horticulturist at the Smithsonian ...
The white, needle-like, aerial roots are characteristic for this orchid. They point upwards, taking the form of a basket around the tall, many-noded, fusiform, canelike, yellow pseudobulbs, catching the decaying leaves and detritus upon which the plant feeds. These pseudobulbs can develop a gigantic size, up to 60 cm long.
Black rot on orchids is caused by Pythium and Phytophthora species. [1] Black rot targets a variety of orchids but Cattleya orchids are especially susceptible. [1] Pythium ultimum and Phytophthora cactorum are known to cause black rot in orchids. [1] Pythium ultimum is a pathogen that causes damping-off and root rot on plants. [2]
Tipularia discolor is an orchid with a reddish brown stem and dull yellow to purplish brown weakly monosymmetric flowers. [10] The leaves of the orchid are easily distinguished as they are ovate with a bright green adaxial surface (top) and a purple abaxial surface (bottom). In autumn, a single leaf emerges, which lasts throughout the winter. [11]
Dactylorhiza maculata, known as the heath spotted-orchid [2] or moorland spotted orchid, is an herbaceous perennial plant of the family Orchidaceae. It is widespread in mountainous regions across much of Europe from Portugal and Iceland east to Russia. It is also found in Algeria, Morocco, and western Siberia. [1] [3]
Outside of the "maculata group", D. majalis is very similar to D. maculata subsp. fuchsii, but is distinguished by the following characters: the spots of the leaves are less elongated, the bracts of the inflorescence are longer and the lower transcend the inflorescence itself; it tends to be less cylindrical (a little more 'globular'), the stem ...
Dendrobium speciosum Sm. var. speciosum [17] – commonly known as the Sydney rock orchid or rock lily which is a lithophyte with between 30 and 100 crowded cream-coloured or dull yellow flowers between August and October and occurs between Bulahdelah and near the Victorian border and as far inland as Mudgee.