Thelypteris subg. Meniscium

(Schreber) C. F. Reed

Phytologia 17: 254. 1968.

Basionym: Undefined subg. Meniscium Schreber Gen. Pl. 2: 757. 1791
Treatment appears in FNA Volume 2.

Distinguished from other subgenera by the combination of evergreen leaves, pinnae entire or merely serrate, crossveins regularly uniting in pairs to form parallel rows of usually more than 10 areoles between costa and pinna margin, areoles each with a single excurrent, usually free, vein produced at the point of union of the crossveins, and elongate, exindusiate sori. x = 36.

Discussion

Species 20 and 21 are included in the genus Meniscium by some workers.

Selected References

None.

reduced +
Alan R. Smith +
(Schreber) C. F. Reed +
Undefined subg. Meniscium +
1-pinnate +  and pinnate-pinnatifid +
Nearly worldwide +
glandular +  and hairy +
not continuous +
branched +  and simple +
transparent +
ephemeral +  and persistent +
round-reniform +
small +  and large +
monomorphic +
evergreen +
reticulate +  and echinate +
short-stalked +  and sessile +
serrate +  and entire +
not +  and reduced +
elongate +
hairy +  and glabrous +
0.15 cm1.5 mm <br />0.0015 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
long-creeping;ascending +
Thelypteris subg. Meniscium +
Thelypteris +
subgenus +
crescent--shaped +
on rock +  and terrestrial +