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Revision of the fern genus Orthiopteris (Saccolomataceae) in Malesia and adjacent regions.

Luong TT, Hovenkamp PH, Sosef MS - PhytoKeys (2015)

Bottom Line: A taxonomic revision of the Old-World representatives of the fern genus Orthiopteris is presented.We recognize eight species, one of which is newly described (Orthiopterissamoensis), and five varieties, of which two are newly described (Orthiopteriscampyluravar.insularis and Orthiopteriscampyluravar.laxa).Orthiopterisacuminata, Orthiopteriscaudata, Orthiopterisminor and Orthiopteriskingii are all reduced to varieties of Orthiopteriscampylura.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology - Evolutionary Biology, Viet Nam National University Ho Chi Minh city (VNUHCM) - University of Science. 227 Nguyen Van Cu, Ho Chi Minh City, Vietnam ; Naturalis Biodiversity Center, section Botany. PO Box 9517, 2300 RA Leiden, The Netherlands.

ABSTRACT
A taxonomic revision of the Old-World representatives of the fern genus Orthiopteris is presented. We recognize eight species, one of which is newly described (Orthiopterissamoensis), and five varieties, of which two are newly described (Orthiopteriscampyluravar.insularis and Orthiopteriscampyluravar.laxa). Orthiopterisacuminata, Orthiopteriscaudata, Orthiopterisminor and Orthiopteriskingii are all reduced to varieties of Orthiopteriscampylura.

No MeSH data available.


Sori of Orthiopteris seen from abaxial side. a, bOrthiopteriscampyluravar.campylura (Cuming 119, MICH) cOrthiopteriscampyluravar.kingii (Brass 12941, MICH) dOrthiopteristrichophylla (Brass 12239, L) eOrthiopteristenuis (Smith 9154, L) fOrthiopteristenuis (Smith 7274, L) gOrthiopteriscampyluravar.caudata (Carr 12518, L) hOrthiopteriscicutarioides (Carr 13257, K) i, jOrthiopteriscampyluravar.insularis (Braithwaite 4110, L) kOrthiopteristenuis (small segment) (Degener 14648, L) lOrthiopterisferulacea (Smith 8932, K) m, nOrthiopterisfirma (Schlechter 14890, L) o, pOrthiopteriscampyluravar.laxa (Mueller s.n., L) q, rOrthiopterishenriettae (Lam & Meeuse 5892, L) sOrthiopterishenriettae. tOrthiopterissamoensis (Reinecke 97a, L) u, vOrthiopterissamoensis (Vaupel 312, L). All scale bars 1 mm, oi = outer indusium, ii = inner indusium.
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Figure 3: Sori of Orthiopteris seen from abaxial side. a, bOrthiopteriscampyluravar.campylura (Cuming 119, MICH) cOrthiopteriscampyluravar.kingii (Brass 12941, MICH) dOrthiopteristrichophylla (Brass 12239, L) eOrthiopteristenuis (Smith 9154, L) fOrthiopteristenuis (Smith 7274, L) gOrthiopteriscampyluravar.caudata (Carr 12518, L) hOrthiopteriscicutarioides (Carr 13257, K) i, jOrthiopteriscampyluravar.insularis (Braithwaite 4110, L) kOrthiopteristenuis (small segment) (Degener 14648, L) lOrthiopterisferulacea (Smith 8932, K) m, nOrthiopterisfirma (Schlechter 14890, L) o, pOrthiopteriscampyluravar.laxa (Mueller s.n., L) q, rOrthiopterishenriettae (Lam & Meeuse 5892, L) sOrthiopterishenriettae. tOrthiopterissamoensis (Reinecke 97a, L) u, vOrthiopterissamoensis (Vaupel 312, L). All scale bars 1 mm, oi = outer indusium, ii = inner indusium.

Mentions: The most variable and important characters for distinguishing Orthiopteris species are found in the sori, the inner indusium and the outer indusium. The inner indusium is a thin membrane on the abaxial surface of the lamina. The outer indusium is continuous with the lamina on the adaxial surface. Each sorus thus forms a pouch-shaped structure that contains up to 30 sporangia, but mostly less, that are immersed within the indusium when young, but variously exserted when mature. We distinguish and classify several soral shape types as shown in Table 1 (see also Figure 3).


Revision of the fern genus Orthiopteris (Saccolomataceae) in Malesia and adjacent regions.

Luong TT, Hovenkamp PH, Sosef MS - PhytoKeys (2015)

Sori of Orthiopteris seen from abaxial side. a, bOrthiopteriscampyluravar.campylura (Cuming 119, MICH) cOrthiopteriscampyluravar.kingii (Brass 12941, MICH) dOrthiopteristrichophylla (Brass 12239, L) eOrthiopteristenuis (Smith 9154, L) fOrthiopteristenuis (Smith 7274, L) gOrthiopteriscampyluravar.caudata (Carr 12518, L) hOrthiopteriscicutarioides (Carr 13257, K) i, jOrthiopteriscampyluravar.insularis (Braithwaite 4110, L) kOrthiopteristenuis (small segment) (Degener 14648, L) lOrthiopterisferulacea (Smith 8932, K) m, nOrthiopterisfirma (Schlechter 14890, L) o, pOrthiopteriscampyluravar.laxa (Mueller s.n., L) q, rOrthiopterishenriettae (Lam & Meeuse 5892, L) sOrthiopterishenriettae. tOrthiopterissamoensis (Reinecke 97a, L) u, vOrthiopterissamoensis (Vaupel 312, L). All scale bars 1 mm, oi = outer indusium, ii = inner indusium.
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Figure 3: Sori of Orthiopteris seen from abaxial side. a, bOrthiopteriscampyluravar.campylura (Cuming 119, MICH) cOrthiopteriscampyluravar.kingii (Brass 12941, MICH) dOrthiopteristrichophylla (Brass 12239, L) eOrthiopteristenuis (Smith 9154, L) fOrthiopteristenuis (Smith 7274, L) gOrthiopteriscampyluravar.caudata (Carr 12518, L) hOrthiopteriscicutarioides (Carr 13257, K) i, jOrthiopteriscampyluravar.insularis (Braithwaite 4110, L) kOrthiopteristenuis (small segment) (Degener 14648, L) lOrthiopterisferulacea (Smith 8932, K) m, nOrthiopterisfirma (Schlechter 14890, L) o, pOrthiopteriscampyluravar.laxa (Mueller s.n., L) q, rOrthiopterishenriettae (Lam & Meeuse 5892, L) sOrthiopterishenriettae. tOrthiopterissamoensis (Reinecke 97a, L) u, vOrthiopterissamoensis (Vaupel 312, L). All scale bars 1 mm, oi = outer indusium, ii = inner indusium.
Mentions: The most variable and important characters for distinguishing Orthiopteris species are found in the sori, the inner indusium and the outer indusium. The inner indusium is a thin membrane on the abaxial surface of the lamina. The outer indusium is continuous with the lamina on the adaxial surface. Each sorus thus forms a pouch-shaped structure that contains up to 30 sporangia, but mostly less, that are immersed within the indusium when young, but variously exserted when mature. We distinguish and classify several soral shape types as shown in Table 1 (see also Figure 3).

Bottom Line: A taxonomic revision of the Old-World representatives of the fern genus Orthiopteris is presented.We recognize eight species, one of which is newly described (Orthiopterissamoensis), and five varieties, of which two are newly described (Orthiopteriscampyluravar.insularis and Orthiopteriscampyluravar.laxa).Orthiopterisacuminata, Orthiopteriscaudata, Orthiopterisminor and Orthiopteriskingii are all reduced to varieties of Orthiopteriscampylura.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology - Evolutionary Biology, Viet Nam National University Ho Chi Minh city (VNUHCM) - University of Science. 227 Nguyen Van Cu, Ho Chi Minh City, Vietnam ; Naturalis Biodiversity Center, section Botany. PO Box 9517, 2300 RA Leiden, The Netherlands.

ABSTRACT
A taxonomic revision of the Old-World representatives of the fern genus Orthiopteris is presented. We recognize eight species, one of which is newly described (Orthiopterissamoensis), and five varieties, of which two are newly described (Orthiopteriscampyluravar.insularis and Orthiopteriscampyluravar.laxa). Orthiopterisacuminata, Orthiopteriscaudata, Orthiopterisminor and Orthiopteriskingii are all reduced to varieties of Orthiopteriscampylura.

No MeSH data available.