PTARMICOIDES (T. & G.) B. Boivin
SYNONYMS: Oligoneuron album (Nutt.) Nesom.
ptarmicoides (Ness) T. & G.
HABIT: Herbaceous perennial from a branched caudex,
to 7 dm; flowers July-October.
SPECIES: In Solidago, this species
is quite distinctive, and unlikely to be confused with other members of the
genus. S. ptarmicoides'
corymbiform (flat-topped) inflorescence and white rays eliminate other Ohio
goldenrods. However, this species could
be confused with the genus Aster, in which it has been placed by some
authors, as Aster ptarmicoides.
Genetically, though, it is aligned with Solidago and is known to
hybridize with several species, although none of the hybrids have been reported
from Ohio. If placed in the segregate
genus Oligoneuron, the correct name becomes O. album (Nutt.)
RANGE: VT, NY, and w. Que. to GA, w. to
Sask., CO, and AK.
RANGE: The only records are from
Ottawa, Van Wert, and Williams counties.
STATUS: 1994 to present: Presumed
Extirpated. This species was de-listed
for ten years based on a misunderstanding of the taxonomy of Solidago
ptarmicoides. It was mistakenly
thought that this taxon was of hybrid origin, with one of the parents being Solidago
riddellii, and that the correct name was Solidago x luteus
(M.L. Greene) Brouillet & Semple.
Actually, this element is quite distinct as a species. It does rarely hybridize with S.
riddellii, but these hybrids are known as S. x bernardii. The plant that has been called Solidago
luteus is a European garden hybrid, and is presumably the result of
crossing with Solidago canadensis.
HABITAT: Dry, rocky or sandy open ground or open
HAZARDS: Unknown, but perhaps competition with
introduced plant species, or overshading of habitat as a result of
succession. Northern Ohio represents
the very southern boundary of a part of this species' range; consequently it
may have been more susceptible to disturbance or alterations of habitat that
may have eliminated or greatly reduced it in Ohio.
GUIDELINES: Collect complete flowering
and/ or fruiting material. Avoid
overcollecting in small populations.
COMMENTS: This species should be sought in appropriate
habitats in northern Ohio, particularly on the Marblehead Peninsula, and in the
T.R. 1988. The Dicotyledoneae of Ohio.
Part 3. Asteraceae. Ohio State University Press, Columbus. 280 pp.
M.L. 1950. Gray's manual of botany, 8th Ed. American Book Company, New York, NY. 1632 pp.
H.A. and A. Cronquist. 1991. Manual of vascular plants of Northeastern
United States and adjacent Canada, 2nd Ed. The New York Botanical Garden, Bronx, NY. 910 pp.
E.G. 1996. Michigan Flora, Part 3.
Cranbrook Institute Sci. Bull. 61 and the Univ. of Mich. Herbarium, Ann
Arbor, MI. 622 pp.
Division of Natural Areas and Preserves
Ohio Department of Natural Resources
Created: 4/1997 Jim