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White mold affects a wide range of hosts and causes sclerotinia stem rot. It is known to infect 408 plant species. As a nonspecific plant pathogen, [3] diverse host range and ability to infect plants at any stage of growth makes white mold a very serious disease. The fungus can survive on infected tissues, in the soil, and on living plants.
Find out how to prune orchids of all types, and when to do your pruning to encourage fresh growth and more blooming.
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 ...
Goodyera pubescens is a plant in the Orchidaceae (orchid) family that is commonly found in North America. The genus Goodyera are terrestrial plants with a fleshy rhizome with basal evergreen leaves in a rosette pattern - frequently having white or pale green markings. Inflorescences are in the form of a spike of small flowers, usually white ...
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]
The leaves and stems are slightly pubescent. The plants grow in (generally) long-lived clumps, with some clumps having up to 50 or more flowers. It is a perennial, with horizontal, wiry-rooted rhizomes growing a few centimeters below the surface of the soil, and hence resistant to most prairie fires.
Cephalanthera austiniae is a species of orchid known as the phantom orchid and snow orchid [2] because the entire plant is white except for a few yellow markings on the flowers. The orchid is native to the western United States ( California , Oregon , Washington and Idaho ), and to British Columbia , Canada.
Platanthera blephariglottis, commonly known as the white fringed orchid or white-fringed orchis, is a species of orchid of the genus Platanthera.It is considered to be an endangered species in Connecticut and Ohio, a threatened species in Florida, Maryland and Rhode Island, exploitably vulnerable in New York, [6] and susceptible to be threatened in Québec.