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Transplants are rarely successful, and the development of mature plants from spores is very slow (taking perhaps 20 years). They can be grown with frequent application of weak fertilizer solution under bright light, high humidity, and year-round moderate temperatures in greenhouses, growth chambers, and laboratories. [ 11 ]
The fertile leaves appear first; their green color slowly becomes brown as the season progresses and the spores are dropped. The spore-bearing stems persist after the sterile fronds are killed by frost, until the next season. The spores must develop within a few weeks or fail. The Osmundastrum cinnamomeum fern forms huge clonal colonies in ...
Fertile fronds bear spores on their undersurface, are dichotomous or antler-shaped, and jut out or hang from the rhizome. The spores are borne in sporangia , clustered in large sori that are usually positioned on the tips of the lobes, on a specialized stalked lobe (as in P. ridleyi and P. coronarium ), or at the sinus between frond lobes.
Map of the United States with Indiana highlighted. Indiana is a state located in the Midwestern United States. As of the 2021 census estimate, the state had 6,805,985 residents. There are 569 municipalities. Under Indiana law, a municipality must have a minimum of 2,000 people to incorporate as a city.
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Polystichum munitum, the western swordfern, [1] is an evergreen perennial fern native to western North America, where it is one of the most abundant ferns in forested areas.It occurs along the Pacific coast from southeastern Alaska to southern California, and also inland east to southeastern British Columbia, northern Idaho and western Montana, with disjunctive populations in northern British ...