Notholaena grayi

Davenport

Bull. Torrey Bot. Club 7: 50, plate 4. 1880.

Illustrated
Synonyms: Cheilanthes grayi (Davenport) Domin Chrysochosma grayi (Davenport) Pichi-Sermolli
Treatment appears in FNA Volume 2. Treatment on page 146.

Stem scales concolored to weakly bicolored, margins usually brown, very narrow and poorly defined, thin, ciliate-denticulate. Leaves 5–20 cm. Petiole brown, equal to or somewhat shorter than blade, rounded adaxially, glandular-farinose, bearing scattered hairs and scales. Blade linear-lanceolate, 2-pinnate-pinnatifid, 3–6 times longer than wide, abaxially with conspicuous whitish farina and dull, light-brown, lanceolate, entire scales scattered along rachises and costae, adaxially distinctly glandular; basal pinnae equal to or slightly larger than adjacent pair, ± equilateral, proximal basiscopic pinnules not greatly enlarged. Ultimate segments sessile, broadly adnate to costae; segment margins slightly recurved, rarely concealing sporangia. Sporangia containing 16 or 32 spores.

Discussion

Subspecies 2 (2 in the flora).

Notholaena grayi comprises two cytotypes here treated as subspecies. Sexually reproducing diploid populations (N. grayi subsp. sonorensis) are concentrated in southern Arizona and western Mexico. Apogamous triploids (N. grayi subsp. grayi) are more widespread, extending from Arizona to central Texas and northeastern Mexico. Isozyme analyses indicate that subsp. grayi is an autotriploid derivative of subsp. sonorensis (G. J. Gastony and M. D. Windham 1989).

Selected References

None.

Key

1 Most sporangia containing 16 spores; spores generally more than 55 µm. Notholaena grayi subsp. grayi
1 Most sporangia containing 32 spores; spores generally less than 55 µm. Notholaena grayi subsp. sonorensis
... more about "Notholaena grayi"
Michael D. Windham +
Davenport +
slightly larger +
rounded +  and truncate or cuneate +
2-pinnate-pinnatifid +  and linear-lanceolate +
Ariz. +, N.Mex. +, Tex. +  and Mexico +
conspicuous +
glandular-farinose +
obcordate;reniform +
monomorphic +
recurved +  and reflexed +
noncircinate +  and circinate +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
ciliate-denticulate +
glandular-farinose +
enlarged +
Bull. Torrey Bot. Club +
light-brown +
persistent +
lanceolate +
Illustrated +
32 (?) +  and 16 (?) +
black +  and dark-brown +
16 +, 32 +  and 64 +
tetrahedral-globose +  and globose +
granulate +
dark-colored +
ascending +  and horizontal +
concolored +  and weakly bicolored +
Cheilanthes grayi +  and Chrysochosma grayi +
Notholaena grayi +
Notholaena +
species +
0 cm0 mm <br />0 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
1 +  and several +
crescent--shaped +  and roundish +