Dig deeper at SERNEC, a consortium of southeastern herbaria.

See herbarium specimens at the Atlas of Florida Vascular Plants

Read about Osmundastrum and Osmunda from Alan Weakley and the Southern Appalachian Botanical Society.

Learn more about Osmundastrum from the Vascular Plants of North Carolina.

Sterile plants of Osmundastrum cinnamomeum are sometimes confused with Anchistea virginica, which also has rather coarse, pinnate-pinnatifid leaves and grows in similar wet, acid places. Osmundastrum is coarser (to 2m tall, vs. to 1m tall), has cinnamon tufts of tomentum present in the axils of the pinnae (vs. absent), has the rachis greenish and rather fleshy in texture (vs. brown and wiry), and bears fronds clumped or tufted from a massive, woody, ascending rhizome covered with old petiole bases (vs. fronds borne scattered along a thick, horizontal, creeping rhizome), per Weakley's Flora (2023).

The taxonomic significance of the densely glandular pubescent Osmundastrum cinnamomeum var. glandulosum (Waters) McAvoy needs additional evaluation; it is reported from scattered locations in e. North America, including SC and VA. Because of its geographic incoherence it is here regarded as a form, per Weakley's Flora (2023).

INCLUDING PLANTS NATIONAL DATABASE:
Osmunda cinnamomea var. cinnamomea   FAMILY Osmundaceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 007-01-001:

Osmunda cinnamomea   FAMILY Osmundaceae

COMMON NAME:
Cinnamon Fern

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Osmundastrum cinnamomeum   FAMILY Osmundaceae

INCLUDING PLANTS NATIONAL DATABASE:
Osmunda cinnamomea var. cinnamomea   FAMILY Osmundaceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 007-01-001:
Osmunda cinnamomea   FAMILY Osmundaceae