Show Lower Taxa
Thelypteris subg. Lastrea
J. Wash. Acad. Sci. 48: 232. 1958.
Basionym: Nephrodium subg. Lastrea Hooker Sp. Fil. 4: 5, 84. 1862
Treatment appears in FNA Volume 2.
Revision as of 23:25, 29 July 2020 by imported>Volume Importer
Distinguished from other subgenera by the combination of seasonal leaves, short-creeping to suberect stems hidden by old petiole bases, persistently scaly petioles, pinnate-pinnatifid blades with greatly reduced proximal pinnae, and veins meeting margin above the sinuses. x = 34.
Discussion
Thelypteris quelpaertensis, T. limbosperma (Allioni) H. P. Fuchs from Europe, and T. elwesii (Baker) Ching from Asia constitute the genus Oreopteris Holub (R. E. Holttum 1981).
Selected References
None.
Lower Taxa
... more about "Thelypteris subg. Lastrea"
3-celled +
pinnalike +
2-pinnate +
pinnate-pinnatifid +
absent +
grooved +
Nearly worldwide +
green +
cordate +
not continuous +
needlelike +
stellate +
transparent +
various +
lacking +
hooked +
absent +
round-reniform +
monomorphic +
seasonal +
dimorphic +
prominent +
crested +
reduced +
J. Wash. Acad. Sci. +
1958 +
grooved +
monolete +
bilateral +
long-creeping;ascending +
hidden +
Thelypteris subg. Lastrea +
Thelypteris +
subgenus +
crescent--shaped +
free +
free +
short-creeping;suberect +
distinguished +