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:
Thelypteridaceae
Thelypteridaceae
Description:
Species Description - Rhizome short-creeping, ca. 1 cm diam fronds few, 0.5-1 m long; stipe glabrescent; lamina 2040 cm long, 18-30 cm wide, 1-pinnate; pinnae 2-6 lateral pairs and conform terminal segment, 12-22 cm long, 3-6 cm wide, subentire or crenate or coarsely serrate, rarely shallowly lobed, the lower ones sometimes gemmiparous in the axil, basal ones mostly short-stalked, subcuneate at the base, distal ones sessile and truncate or rounded; costules 4-8 mm apart; veins meniscioid, with 6-9 pairs of secondary veins, the lower 3-5 pairs upeurved and acutely united with a free excurrent veinlet, usually the next few pairs alternately united in a common veinlet running to the sinus; costae, veins, and leaf tissue on both sides pilose, the hairs mostly acicular, ca. 0.3-0.5(-1.0) mm long; sori in a double row between the costules, exindusiate; sporangia with 4-6 acicular setae 0.1-0.3 mm long; n = 72.
Species Description - Rhizome short-creeping, ca. 1 cm diam fronds few, 0.5-1 m long; stipe glabrescent; lamina 2040 cm long, 18-30 cm wide, 1-pinnate; pinnae 2-6 lateral pairs and conform terminal segment, 12-22 cm long, 3-6 cm wide, subentire or crenate or coarsely serrate, rarely shallowly lobed, the lower ones sometimes gemmiparous in the axil, basal ones mostly short-stalked, subcuneate at the base, distal ones sessile and truncate or rounded; costules 4-8 mm apart; veins meniscioid, with 6-9 pairs of secondary veins, the lower 3-5 pairs upeurved and acutely united with a free excurrent veinlet, usually the next few pairs alternately united in a common veinlet running to the sinus; costae, veins, and leaf tissue on both sides pilose, the hairs mostly acicular, ca. 0.3-0.5(-1.0) mm long; sori in a double row between the costules, exindusiate; sporangia with 4-6 acicular setae 0.1-0.3 mm long; n = 72.
Discussion:
Lastrea poiteana Bory, Diet, class, hist. nat. 9: 233. 1825. Dryopteris poiteana (Bory) Urban, Symb. antill. 4: 20. 1903. Goniopteris poiteana (Bory) Ching, Sunyatsenia 5: 239. 1940. Type. “Guiane.” Comm. Poiteau (P, not found). Polypodium crenatum Swartz, Prodr. veg. ind. occ. 132. 1788, nom. illeg., non Forsskål, 1775. Type. Jamaica. Swartz s.n. (S). Complete synonymy cited in A. R. Smith (1983). The sole Oaxacan collection is without sori and so is unassessable for one of the important characteristics (setose sporangia). But the minute buds at the base of the pinnae show convincingly that it is this species and not T. meniscioides, which has a similar aspect but lacks buds. It also differs from T. ghiesbreghtii by the presence of buds, setose sporangia, fewer areoles between costa and margin, and somewhat shorter hairs on the lamina below.
Lastrea poiteana Bory, Diet, class, hist. nat. 9: 233. 1825. Dryopteris poiteana (Bory) Urban, Symb. antill. 4: 20. 1903. Goniopteris poiteana (Bory) Ching, Sunyatsenia 5: 239. 1940. Type. “Guiane.” Comm. Poiteau (P, not found). Polypodium crenatum Swartz, Prodr. veg. ind. occ. 132. 1788, nom. illeg., non Forsskål, 1775. Type. Jamaica. Swartz s.n. (S). Complete synonymy cited in A. R. Smith (1983). The sole Oaxacan collection is without sori and so is unassessable for one of the important characteristics (setose sporangia). But the minute buds at the base of the pinnae show convincingly that it is this species and not T. meniscioides, which has a similar aspect but lacks buds. It also differs from T. ghiesbreghtii by the presence of buds, setose sporangia, fewer areoles between costa and margin, and somewhat shorter hairs on the lamina below.
Distribution:
Mexico North America| Brazil South America| Peru South America| Amazonas Colombia South America| French Guiana South America| West Indies| Panama Central America| Guatemala Central America|
Mexico North America| Brazil South America| Peru South America| Amazonas Colombia South America| French Guiana South America| West Indies| Panama Central America| Guatemala Central America|