Hymenophyllum rarum, the narrow filmy-fern, is a species of fern from the family Hymenophyllaceae. This thin-leaved fern is commonly found in New Zealand and Tasmania, growing in patches on rocks and is epiphytic on trees and tree ferns, growing in moist gullies or rainforests. A rather drought tolerant species often found at exposed sites ranging from coastal to montane areas. Forming extensive, interwoven and creeping patches with its thin long (creeping) rhizomes sparsely covered in red-brown hairs, easily recognised by its membranous grey-green fronds, the smooth margins of the pinnae, ultimate segments and indusia; and by the sunken sori in the uppermost segments of the uppermost pinnae. The species can be found throughout Tasmanian rainforests as well as occurring in New South Wales, Victoria and New Zealand on the North and South Islands as well as, Stewart, Chatham and Auckland Islands.
Filmy fern typically resists disease well and faces relatively few insect pests. The care level for Filmy fern is regarded as difficult, as it requires a moist environment and frequent watering. However, its roots are prone to rotting if overwatered or if the environment lacks good ventilation. Filmy fern is suitable for people with some growing experience, since most people can keep it alive for a period of time. Still, it may struggle to thrive, and its leaves can dry out and become less healthy over time.
How to keep Hymenophyllum Rarum.
Light
Filmy fern is native to habitats such as forest undergrowths or stony regions, which naturally provide shade. It thrives best in Full Shade sunlight conditions, but it can also withstand Partial Sun.
Temperature
Filmy fern flourishes in dense forest undergrowth. It is extremely responsive to temperature and moisture conditions, with intense heat, aridity, and strong sunlight potentially causing discomfort to the fern. During the hotter months, it demands sufficient shade and a moisture-laden environment. Ordinarily, the Filmy fern doesn't need extra attention during the colder season, however, an extended period of drought in winter can indeed spell death for the fern.
Botanical profile.
- Plant Type
- Fern
- Life Cycle
- Perennial
- Genus
- Hymenophyllum
- Family
- Hymenophyllaceae
- Hardiness Zone
- 8-11
- Mature Height
- 5 cm to 20 cm
- Mature Spread
- 5 cm to 15 cm
- Leaf Color
- Light Green, Pale Green
- Leaf Type
- Evergreen
- Planting Time
- Spring, Summer
- Native Area
- New Zealand
