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The erect shoots each contain two or more branches near the base. Branches are more likely ascending to spreading, forked and tree-like, and mostly are arranged on the same plane, fan-like. Erect shoots can measure from 3 to 20 inches tall, although, vegetative shoots are typically less than 8 inches.
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.
The shape, arrangement, and location of the sori are often valuable clues in the identification of fern taxa. Sori may be circular or linear. They may be arranged in rows, either parallel or oblique to the costa, or randomly. Their location may be marginal or set away from the margin on the frond lamina.
Zealandia pustulata is a species of fern native to eastern Australia and New Zealand. [2] It is commonly referred to as 'kangaroo fern' or 'kangaroo paw fern' as its native range includes Australia and the shape of its mature foliage tends to resemble the shape of a kangaroo's foot.
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 ...
The term "fern ally" included under Pteridophyta generally refers to vascular spore-bearing plants that are not ferns, including lycopods, horsetails, whisk ferns and water ferns (Marsileaceae, Salviniaceae and Ceratopteris). This is not a natural grouping but rather a convenient term for non-fern, and is also discouraged, as is eusporangiate ...