Flora of North America species comparison

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Osmunda cinnamomea

cinnamon fern, osmonde cannelle
Leaves

pinnate-pinnatifid;

petioles slightly shorter than blades, not winged, with light brown hairs when young, glabrate with age.
Fertile leaves

with no expanded pinnae, green, becoming brownish, shorter and narrower than sterile leaves, withering after sporulation.
Sterile leaves

ovate to lanceolate, ca. 0.3–1.5 m;

pinnae broadly oblong with persistent tuft of hairs on abaxial surface at base; ultimate segments with base obtuse, margins entire, apex usually mucronate.
Sporangia

brown.
2n

=44.

Osmunda cinnamomea
Phenology Sporulation spring–early summer (late summer, early winter in Florida).
Habitat Moist areas, acidic soils, frequently in vernal seeps
Elevation 0–2300 m (0–7500 ft)
Distribution
from FNA
AL; AR; CT; DE; FL; GA; IA; IL; IN; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NB; NF; NS; ON; PE; QC; SPM; Mexico; Central America; South America; West Indies; Asia
[WildflowerSearch map]
Discussion

Many forms of Osmunda cinnamomea have been described from within the flora area. It is widely cultivated as an ornamental.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 2.
Parent taxa Osmundaceae > Osmunda
Sibling taxa
O. claytoniana, O. regalis, O. ruggii
Synonyms O. cinnamomea var. glandulosa
Name authority Linnaeus: Sp. Pl. 2: 1066. (1753)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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