Pellaea glabella subsp. glabella

Mettenius ex Kuhn
Endemic
Synonyms: Pellaea atropurpurea var. bushii Mackenzie
Treatment appears in FNA Volume 2.

Some ultimate segments (especially terminal segments) with hairlike scales abaxially near midrib; most sporangia containing 32 spores; spores averaging 60–72 µm diam. n = 2n = 116, apogamous.


Phenology: Sporulating summer–fall.
Habitat: Calcareous cliffs and ledges, usually on limestone substrates
Elevation: 0–1200 m

Distribution

V2 766-distribution-map.gif

Ont., Que., Ark., Conn., Ill., Ind., Iowa, Kans., Ky., Md., Mass., Mich., Minn., Mo., Nebr., N.Y., Ohio, Okla., Pa., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

G. J. Gastony (1988) has shown that this apogamous tetraploid was derived from Pellaea glabella subsp. missouriensis by an autopolyploid increase in chromosome number.

Selected References

None.

Lower Taxa

None.
Michael D. Windham +
Mettenius ex Kuhn +
cordate +, truncate +  and rounded +
glabrous +  and pubescent +
linear-oblong +  and ovatelanceolate +
1cm;8cm +
erose-denticulate +
straight +
Ont. +, Que. +, Ark. +, Conn. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Nebr. +, N.Y. +, Ohio +, Okla. +, Pa. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–1200 m +
yellow +  and white +
obcordate;reniform +
Calcareous cliffs and ledges, usually on limestone substrates +
monomorphic +
clustered;widely scattered +
recurved +  and reflexed +
noncircinate +  and circinate +
2 cm20 mm <br />0.02 m <br /> (40 cm400 mm <br />0.4 m <br />) +
? (?) +  and ? (?) +
entire +, erose +  and dentate +
entire +  and denticulate +
pubescent +  and glabrous +
Sporulating summer–fall. +
reddish-brown +
persistent +
occasional +
hairlike +
thin +, 0.1mm +  and 0.3mm +
brown +  and tan +
cristate +  and tetrahedral-globose +
dark colored +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Pellaea atropurpurea var. bushii +
Pellaea glabella subsp. glabella +
Pellaea glabella +
subspecies +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
leathery +  and herbaceous +
crescent--shaped +  and roundish +
branched +  and anastomosing +