A Key to the Pteridophytes of Moorea With Terminology Glossary Andrew G. Murdock, 2003 Updated by Joel H. Nitta, 2011 Key to major groups given first. Click on group name for key of species in each group. |
||
1 | Sporangia borne singly in the axils of leaves or on upper surface of leaves | GROUP 1 |
Sporangia borne on underside of leaves or on leaf margins | 2 | |
2 | Blades extremely thin (laminae usually only a single cell layer in thickness between veins); stomata absent | GROUP 2 |
Blades with laminae more than 3 cells thick; stomata present | 3 | |
3 | Plants aquatic | Marsilea polycarpa |
Plants not aquatic | 4 | |
4 | Plants epiphytic, epipetric, or hemi-epiphytic | 5 |
Plants terrestrial (including those with rhizomes in ground but leaves that clamber or climb over other vegetation as often observed in Group 5) | 6 | |
5 | Leaves simple | GROUP 3 |
Leaves pinnatifid or more divided | GROUP 4 | |
6 | Leaves indeterminate; blades pseudodichotomously forked with a resting bud in each axil | GROUP 5 |
Leaves usually determinate; blades not pseudodichotomously forked | 7 | |
7 | Leaves simple to 1-pinnate-pinnatifid | GROUP 6 |
Leaves 2-pinnate or more divided | GROUP 7 | |
Murdock, A. G. and A. R. Smith. 2002. Pteridophytes of Moorea, French Polynesia, with a new species, Tmesipteris gracilis. Pacific Science, 57 (3). Copeland, E. B. 1932. Pteridophytes of the Society Islands. Bernice P. Bishop Museum Bulletin 93: 186. Acropetal: occurring on the side of a pinna that is nearest the apex of the frond Aerophore: an evanescent spot, swelling, or finger-like projection of thin-walled cells found along the stipe or in the pinna or pinnule axils of some ferns that apparently aids gas exchange with the atmosphere Aristate: bearing a long, stiff, bristle-like apical prolongation of a midrib beyond the margin Farina: a thick, powdery-appearing exudate of glands covering the lamina surface Medial: (used to describe sorus position) borne midway between the costa or costule and the margin Pedate: having the basal basiscopic portions of the basal pinnae more developed and divided than the other portions of the laminae Sporophyll: in ferns, a frond bearing sporangia; in lycophytes, a scale-like microphyll subtending a sporangium Superficial: (used to describe sorus position) on the surface of the lamina, rather than on the margin Wing: (=ala) a long, narrow membrane laterally bordering a stipe, rachis, or costae Some definitions adapted from: Lellinger, David B. 2002. A Modern Multilingual Glossary for Taxonomic Pteridology. Pteridologia 3: 1–263.
|