FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 19: | Line 19: | ||
|elevation=0–1000 m | |elevation=0–1000 m | ||
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis. | |distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis. | ||
| − | |discussion=<p>D. F. M. Brown (1964) hypothesized that tetraploid <i>Woodsia obtusa</i> might be an autopolyploid derived from <i>W. oregana</i>. Recent isozyme and spore ornamentation studies indicate, however, that these species are not closely related, and the discovery of a diploid cytotype of <i>W. obtusa</i> suggests a different (albeit autopolyploid) origin for this taxon (M. D. Windham 1993). Tetraploid < | + | |discussion=<p>D. F. M. Brown (1964) hypothesized that tetraploid <i>Woodsia obtusa</i> might be an autopolyploid derived from <i>W. oregana</i>. Recent isozyme and spore ornamentation studies indicate, however, that these species are not closely related, and the discovery of a diploid cytotype of <i>W. obtusa</i> suggests a different (albeit autopolyploid) origin for this taxon (M. D. Windham 1993). Tetraploid <i></i>subsp.<i> obtusa</i> crosses with diploid <i></i>subsp.<i> occidentalis</i>; the resulting triploids are sterile and have malformed spores. It also hybridizes with <i>W. oregana </i>subsp.<i> cathcartiana</i> to form the sterile tetraploid hybrid known as W. × kansana Brooks.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 28: | Line 28: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Woodsia obtusa subsp. obtusa | name=Woodsia obtusa subsp. obtusa | ||
| − | |||
|authority=(Sprengel) Torrey | |authority=(Sprengel) Torrey | ||
|rank=subspecies | |rank=subspecies | ||
| Line 43: | Line 42: | ||
|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V2/V2_182.xml |
|genus=Woodsia | |genus=Woodsia | ||
|species=Woodsia obtusa | |species=Woodsia obtusa | ||
Revision as of 19:46, 16 December 2019
Stems compact to short-creeping, individual branches usually 5–10 mm diam. Blade coarsely cut and evidently 2-pinnate. Proximal pinnules of lower pinnae usually shallowly lobed or merely dentate. Spores averaging 42–47 µm. 2n = 152.
Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes (rarely terrestrial), found on a variety of substrates including both granite and limestone
Elevation: 0–1000 m
Distribution
Ont., Que., Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.
Discussion
D. F. M. Brown (1964) hypothesized that tetraploid Woodsia obtusa might be an autopolyploid derived from W. oregana. Recent isozyme and spore ornamentation studies indicate, however, that these species are not closely related, and the discovery of a diploid cytotype of W. obtusa suggests a different (albeit autopolyploid) origin for this taxon (M. D. Windham 1993). Tetraploid subsp. obtusa crosses with diploid subsp. occidentalis; the resulting triploids are sterile and have malformed spores. It also hybridizes with W. oregana subsp. cathcartiana to form the sterile tetraploid hybrid known as W. × kansana Brooks.
Selected References
None.