Davallia tyermannii (Davallia tyermannii)
Davallia tyermannii is a rhizomatous, clumping fern that can grow epiphytically or on rocks, with hairy, silvery-white rhizomes that creep over the growing medium and may hang over the edge of a container. It is reported to be an evergreen fern.
Overview
Davallia tyermannii is a rhizomatous, clumping fern that can grow epiphytically or on rocks, with hairy, silvery-white rhizomes that creep over the growing medium and may hang over the edge of a container. It is reported to be an evergreen fern.
Origin and habitat
Davallia tyermannii is native to northern Myanmar, southern China, and Taiwan, while the RHS also describes its distribution more broadly as South Asia. It is reported to grow as an epiphyte or on rocks in typically subtropical environments.
Characteristics
Mature plants reach 10–50 cm in height. With few sources available, mature spread is reported at about 10–50 cm. The leaves are reported to have a triangular outline, a dark green color, and a finely divided form. The plant has a creeping rhizome.
Light
Sources describe this differently, but bright filtered light is given for indoor or greenhouse cultivation. Bright indirect light is generally reported as suitable.
Watering
The growing medium is generally kept evenly moist while remaining well drained.
Humidity and airflow
Davallia tyermannii is reported to have a high humidity need.
Temperature and dormancy
Davallia tyermannii is reported to be tender.
Growing medium and mounting
Loam may be used; for indoor cultivation, a peat-free multipurpose growing medium or a mixture of loam, coarse sand, and leaf mold is reported as suitable. The medium is generally kept moist and well drained, with acidic to neutral conditions.
Propagation
Davallia tyermannii is reported to be propagated by spores or division.
Common problems
Scale insects are reported as a possible pest, while diseases are generally uncommon. The plant is reported to be sensitive to cold, to benefit from a sheltered position, and to be generally grown as an indoor or greenhouse plant.
Identification
Davallia tyermannii is reported to have hairy, silvery-white creeping rhizomes that can extend across the surface of a pot and hang outside the container, together with dark green, finely divided leaves.