Pellaea glabella subsp. glabella
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
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.
"thin" is not a number.
... more about "Pellaea glabella subsp. glabella"
interrupted +
vertical +
3-celled +
obtuse +
prominent +
1-2-pinnate +
not striate +
herbaceous +
absent +
dull +
leathery +
whitish +
erose-denticulate +
lighter +
straight +
often shorter +
1mm;50mm +
villous +
prominent +
lacking +
marginal +
asymmetric +
green +
aboveground +
glabrous +
obcordate;reniform +
longitudinal +
single +
commonly +
monomorphic +
clustered;widely scattered +
clustered +
dimorphic +
revolute +
sinuous +
recurved +
complex +
brown +
lustrous +
rounded +
ascending +
Linnaea +
1869 +
brown +
straight +
glabrous +
rounded +
elevated +
2;3 +
scattered +
reddish-brown +
persistent +
occasional +
hairlike +
confluent +
reflexed +
defined +
fertile +
confluent +
Endemic +
long-stalked +
concealing +
trilete +
dark colored +
lustrous +
terrestrial +
small +
branched +
stout +
creeping +
ascending +
continuous +
Pellaea glabella subsp. glabella +
Pellaea glabella +
subspecies +
glabrous +
single +
pinnate +
divergent +
free +
obscure +
forked +
perennial +