Novelties in Lindsaea Dryand. ex Sm. (Lindsaeaceae) from South America
Fecha
2017-12
Autores
Rojas Alvarado, Alexander
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Editor
Universidad Nacional (Costa Rica)
Resumen
Novedades en Lindsaea Dryand. ex Sm. (Lindsaeaceae) para Suramérica. En este artículo se describen e ilustran tres especies nuevas de Lindsaea Dryand. ex Sm. para Suramérica: L. falcatosora A. Rojas, L. nana A. Rojas y L. trapezoidalis A. Rojas. La primera especie difiere de L. pleioptera Kramer por sus pinnas falcadas (en frondas 1-pinnadas) o pínnulas (en frondas 2-pinnadas), con soro falcado restringido a 2/3 basales, o ausente en 1/3 apical donde la lámina es dentada. La segunda especie difiere de L. falcata Dryand. por frondas más pequeñas (4.5–8 × 1.7–2.6 cm vs. 10–25 × 4–7.5 cm), pinnas perpendiculares a ligeramente ascendentes (vs. falcadas) y segmento apical subconforme (vs. conforme), deltado (vs. hastado). La tercera especie difiere de L. taeniata Kramer por sus estípites and raquises angulados (vs. teretes) y pínnulas proporcionalmente más cortas (2-3.5 veces más largas que anchas vs. al menos 5 veces más largas que anchas). También tres variedas son combinadas como especies.
In this paper three new species of Lindsaea Dryand. ex Sm. are described and illustrated from South America: falcatosora A. Rojas, L. nana A. Rojas and L. trapezoidalis A. Rojas. The first species differ from L. pleioptera Kramer by its falcate pinnae (in 1-pinnate fronds) or pinnules (in 2-pinnate fronds) with falcate sori restricted to 2/3 basal, or absent in 1/3 apical where the blade is dentate. The second species differ from L. falcata Dryand. by its smaller blades (4.5–8 × 1.7–2.6 cm vs. 10–25 × 4–7.5 cm), pinnae perpendicular to slightly ascending (vs. falcate) and apical segment subconform (vs. conform), deltate (vs. hastate). The third species differ from L. taeniata Kramer by its angulate (vs. terete) stipe and rachises and proportionally shorter (2-3.5 times longer than wide vs. at least 5 times longer than wide) pinnules. Also three varietals are combined as species.
In this paper three new species of Lindsaea Dryand. ex Sm. are described and illustrated from South America: falcatosora A. Rojas, L. nana A. Rojas and L. trapezoidalis A. Rojas. The first species differ from L. pleioptera Kramer by its falcate pinnae (in 1-pinnate fronds) or pinnules (in 2-pinnate fronds) with falcate sori restricted to 2/3 basal, or absent in 1/3 apical where the blade is dentate. The second species differ from L. falcata Dryand. by its smaller blades (4.5–8 × 1.7–2.6 cm vs. 10–25 × 4–7.5 cm), pinnae perpendicular to slightly ascending (vs. falcate) and apical segment subconform (vs. conform), deltate (vs. hastate). The third species differ from L. taeniata Kramer by its angulate (vs. terete) stipe and rachises and proportionally shorter (2-3.5 times longer than wide vs. at least 5 times longer than wide) pinnules. Also three varietals are combined as species.
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Palabras clave
HELECHOS, NUEVAS ESPECIES, NUEVOS ESTATUS, LINDSAEA, NEOTRÓPICO, FERNS, NEOTROPICS