Monographs Details:
Authority:
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Family:
Polypodiaceae
Polypodiaceae
Description:
Species Description - Rhizome creeping; rhizome scales concolorous orange-brown, ovate-lanceolate, 1-1.3 mm long; fronds distant; stipe ca. 1/8 the frond length, dark brown base (1 -2 mm), the color changing abruptly to green, glabrous; blades dimorphic, sterile blade shorter, deeply pinnatifid, 10-20 mm long, 2-3 mm wide, segments 1-1.5 mm long, fertile blade dimorphic, longer, 35-60 mm long, fertile in terminal half, basal sterile part pinnatifid, 25-35 mm long, 1-1.5 mm wide, the pinnae ascending, debate, 0.8-1 mm long, glabrous except for very sparse minute pale hairs; fertile part terminal, subentire to undulate, 10-25 mm long, 1.8-2.3 mm wide; sori basal on unbranched veins, appearing nearly costal, glabrous, the lamina folded somewhat.
Species Description - Rhizome creeping; rhizome scales concolorous orange-brown, ovate-lanceolate, 1-1.3 mm long; fronds distant; stipe ca. 1/8 the frond length, dark brown base (1 -2 mm), the color changing abruptly to green, glabrous; blades dimorphic, sterile blade shorter, deeply pinnatifid, 10-20 mm long, 2-3 mm wide, segments 1-1.5 mm long, fertile blade dimorphic, longer, 35-60 mm long, fertile in terminal half, basal sterile part pinnatifid, 25-35 mm long, 1-1.5 mm wide, the pinnae ascending, debate, 0.8-1 mm long, glabrous except for very sparse minute pale hairs; fertile part terminal, subentire to undulate, 10-25 mm long, 1.8-2.3 mm wide; sori basal on unbranched veins, appearing nearly costal, glabrous, the lamina folded somewhat.
Discussion:
Acrostichum serrulatum Swartz, Prodr. veg. ind. occ. 128. 1788. Grammitis serrulata (Swartz) Swartz, J. Bot. (Schrader) 1800(2): 18. 1801. Xiphopteris serrulata (Swartz) Kaulfuss, Wesen Farrenkr. 87. 1827. Polypodium serrulatum (Swartz) Mettenius, Fil. hort. bot. Lips. 30. 1856, nom. illeg., non Swartz, 1801. Polypodium duale Maxon, Contr. U.S. Natl. Herb. 16: 61. 1912. Type. Jamaica. Swartz s.n. (S, isotype US!). For additional synonymy, see Bishop (1978). The type species of the segregate genus Xiphopteris Kaulfuss (1827) has been placed in Grammitis s.l. by various authors, but Bishop (1978) in his review of the genus Cochlidium Kaulfuss included it in Cochlidium on the basis of the concolorous scales, lack of multibranched trichomes, a stelar type similar to that of Cochlidium and the conduplicate nature of the fertile region. He believed the almost-fused nature of the receptacles suggested a derivation from a coenosoral ancestor, although the series suggests to us a trend in the opposite direction (separate sori to coenosori) with equal justification.
Acrostichum serrulatum Swartz, Prodr. veg. ind. occ. 128. 1788. Grammitis serrulata (Swartz) Swartz, J. Bot. (Schrader) 1800(2): 18. 1801. Xiphopteris serrulata (Swartz) Kaulfuss, Wesen Farrenkr. 87. 1827. Polypodium serrulatum (Swartz) Mettenius, Fil. hort. bot. Lips. 30. 1856, nom. illeg., non Swartz, 1801. Polypodium duale Maxon, Contr. U.S. Natl. Herb. 16: 61. 1912. Type. Jamaica. Swartz s.n. (S, isotype US!). For additional synonymy, see Bishop (1978). The type species of the segregate genus Xiphopteris Kaulfuss (1827) has been placed in Grammitis s.l. by various authors, but Bishop (1978) in his review of the genus Cochlidium Kaulfuss included it in Cochlidium on the basis of the concolorous scales, lack of multibranched trichomes, a stelar type similar to that of Cochlidium and the conduplicate nature of the fertile region. He believed the almost-fused nature of the receptacles suggested a derivation from a coenosoral ancestor, although the series suggests to us a trend in the opposite direction (separate sori to coenosori) with equal justification.
Distribution:
Mexico North America| Mauritius Africa| Madagascar Africa| Africa| Brazil South America| Bolivia South America| Colombia South America| Venezuela South America| Venezuela South America| Trinidad and Tobago South America| West Indies| Panama Central America| Guatemala Central America|
Mexico North America| Mauritius Africa| Madagascar Africa| Africa| Brazil South America| Bolivia South America| Colombia South America| Venezuela South America| Venezuela South America| Trinidad and Tobago South America| West Indies| Panama Central America| Guatemala Central America|