Sceptridium spp.
grapeferns
North America, eastern Asia, and Europe
Native to North America
Overview
Sceptridium spp. is a genus of about 12 terrestrial ferns in the family Ophioglossaceae, segregated from Botrychium spp. and distributed across temperate and subtropical North America, eastern Asia, and parts of Europe. Each plant typically produces a single frond per year from a short, fleshy underground rhizome bearing succulent roots. The frond divides into two parts: a sterile, leathery, triangular blade (the trophophore) held 5-20 cm (2-8 in) above the ground, and a separate stalked fertile segment (the sporophore) carrying branched clusters of round sporangia that resemble bunches of grapes, the source of the common name grapefern. Whole plants stand 10-45 cm (4-18 in) tall. In many species the sterile blade appears in summer and persists through winter, often turning bronze in cold weather, before withering the following spring. Foliage colour ranges from green to bronze-green, with the blade finely divided in S. dissectum and broader and leathery in S. multifidum. Plants grow in open woodland, old fields, roadside banks, and disturbed ground, often in acidic soil. The genus depends on symbiotic mycorrhizal fungi for part of its life cycle, including an underground gametophyte stage, which makes the plants slow to establish and difficult to transplant.
Native Range
Native across temperate and subtropical North America, eastern Asia, and Europe, with the greatest species diversity in eastern North America. Individual species such as S. multifidum range widely across northern latitudes, while others like S. biternatum are restricted to the southeastern United States.Suggested Uses
Grown in woodland gardens, shaded native-plant borders, and naturalistic plantings where the winter-persistent blade adds cool-season interest. The genus suits conditions that mimic its woodland habitat and is seldom used in formal beds because it resists transplanting and spreads slowly.How to Identify
Appearance
Size & Dimensions
Height4" - 1'6"
Width/Spread3" - 8"
Bloom Information
As a fern, Sceptridium spp. produces spores rather than flowers. The fertile sporophore ripens its sporangia from late summer into autumn, releasing yellow spores between August and October in most species. The fertile stalk then withers, while the sterile blade may persist over winter.
Detailed Descriptions
Foliage Description
green to bronze-greenGrowing Conditions
Sun Requirements
Requires 3-6 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight