Flora of North America species comparison

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Omalotheca sylvatica

gnaphale des bois, woodland arctic-cudweed, woodland cudweed
Habit Plants 10–70 cm.
Leaves

basal and cauline;

blades 1-nerved, linear to narrowly oblanceolate or lanceolate, 2–8 cm × 2–10 mm, distal cauline smaller, linear, faces bicolor, abaxial gray, silvery sericeous, adaxial green, glabrescent.
Involucres

campanulo-turbinate, 5–6.5 mm.
Phyllaries

some or all with conspicuous dark brown spot distal to middle.
Heads

(20–90) in loose, spiciform (leafy-bracteate, interrupted) arrays (4–35 cm, occupying 1/3–5/6 plant heights, simple or branched at bases, primary axes mostly visible).
Cypselae

cylindric to fusiform, minutely strigose;

pappus bristles basally connate, falling together.
2n

= 56.

Omalotheca sylvatica
Phenology Flowering Jul–Sep(–Oct).
Habitat Open woods, boggy woods, rocky slopes, clearings, fields, borders of woods, roadsides, muddy banks, disturbed sites
Elevation 10–500 m (0–1600 ft)
Distribution
from FNA
ME; MI; NH; NY; PA; VT; WI; BC; NB; NF; NS; ON; PE; QC; SPM; Europe; Asia (Caucasus, Iran, Siberia)
[WildflowerSearch map]
[BONAP county map]
Discussion

The circumboreal Omalotheca sylvatica may have been introduced from Eurasia (Frére Marie-Victorin 1995). Omalotheca alpigena (K. Koch) Holub and O. caucasica (Sommier & Levier) S. K. Cherepanov were treated as synonyms of O. sylvatica by A. J. C. Grierson (1975); they have been recognized as distinct species in other treatments.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 440.
Parent taxa Asteraceae > tribe Gnaphalieae > Omalotheca
Sibling taxa
O. norvegica, O. supina
Synonyms Gnaphalium sylvaticum
Name authority (Linnaeus) Schultz-Bipontinus & F. W. Schultz: in F. W. Schultz, Arch. Fl., 311. (1861)
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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