Danaea trinitatensis Christenh. & Tuomisto
Descripción
Diagnosis: Rhizomata erecta, usque ad 10 cm longa et 2.5 cm lata ad apicem (in sicco). Stipites articulati, nodis (1–)2(–3). Pinnae laterales (1–)3–4-jugae, maximae 6.0–16.5 X 2.0–3.9 cm, ellipticae vel lanceolatae vel oblanceolatae, apice longe acuminato vel paene cuspidato, marginibus ad apicem saepe insigniter sinuatis. Pinna terminalis oblonga vel lanceolata, (6–)11–22 X (2.0–)3.0–4.6 cm. Frondes fertiles (2–)4(–5)-jugae, stipite nodoso 1–3 nodis et pinnis lateralibus lanceolatis. Habitat in silvis umbrosis humidis in Insula Trinitatis.
Rhizomes erect, to 10 cm long and 2.5 cm wide at apex (when dried), leaves spirally arranged and stilt roots produced on all sides; stipules 0.3–0.5 cm wide. Sterile leaves 19–55 cm long; petioles (8–)18–38 cm long, with (1–)2(–3) nodes; rachises sparsely scaly, not or very narrowly winged; blades (12–)18–29 X 9–24(–27) cm, pale and yellowish green; imparipinnate with (1–)3–4 lateral pinna pairs, sometimes simple; largest lateral pinnae elliptic to (ob–)lanceolate, 3.0–6.5 times longer than wide, 6.0–16.5 X 2–3.9 cm, widest at (or above) the middle; pinna bases acute, apices long acuminate to almost cuspidate, margins entire but slightly irregular and often remarkably sinuate at apex; terminal pinnae present, conform but oblong to lanceolate, parallel-sided or widest at or below the middle, (6–)11–20 cm X (2.0–)3.0–4.6 cm; veins simple or paired at base, occasionally forked, 8–10 veins per cm. Fertile leaves 26–66 cm long, petioles 15–46 cm long with 1–3 nodes, blades 11–20 X 6–16 cm, brown, with (2–)4(–5) pinna pairs; lateral pinnae lanceolate, 4–8 times longer than wide; largest lateral pinnae 4–10(–11) X 0.9–1.8(–2.0) cm, widest below or at the middle, apices acute–acuminate, bases obtuse, margins serrulate; terminal pinnae lanceolate, (4–)5–10(–16) X 1–2 cm, widest below the middle, margins serrulate.
Juvenile plants may produce simple leaves up to 20 cm long and fertile leaves may already be produced at the trifoliolate stage.A
Rhizomes erect, to 10 cm long and 2.5 cm wide at apex (when dried), leaves spirally arranged and stilt roots produced on all sides; stipules 0.3–0.5 cm wide. Sterile leaves 19–55 cm long; petioles (8–)18–38 cm long, with (1–)2(–3) nodes; rachises sparsely scaly, not or very narrowly winged; blades (12–)18–29 X 9–24(–27) cm, pale and yellowish green; imparipinnate with (1–)3–4 lateral pinna pairs, sometimes simple; largest lateral pinnae elliptic to (ob–)lanceolate, 3.0–6.5 times longer than wide, 6.0–16.5 X 2–3.9 cm, widest at (or above) the middle; pinna bases acute, apices long acuminate to almost cuspidate, margins entire but slightly irregular and often remarkably sinuate at apex; terminal pinnae present, conform but oblong to lanceolate, parallel-sided or widest at or below the middle, (6–)11–20 cm X (2.0–)3.0–4.6 cm; veins simple or paired at base, occasionally forked, 8–10 veins per cm. Fertile leaves 26–66 cm long, petioles 15–46 cm long with 1–3 nodes, blades 11–20 X 6–16 cm, brown, with (2–)4(–5) pinna pairs; lateral pinnae lanceolate, 4–8 times longer than wide; largest lateral pinnae 4–10(–11) X 0.9–1.8(–2.0) cm, widest below or at the middle, apices acute–acuminate, bases obtuse, margins serrulate; terminal pinnae lanceolate, (4–)5–10(–16) X 1–2 cm, widest below the middle, margins serrulate.
Juvenile plants may produce simple leaves up to 20 cm long and fertile leaves may already be produced at the trifoliolate stage.A
Forma de vida
TerrestreA
Ejemplar revisado
México (Tuomisto 17504, XAL). Chis (Purpus 7247, UC). Oax (Mickel 6407, UC).B
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Bibliografía
A. Christenhusz, M. J. M. 2010: Danaea (Marattiaceae) revisited: biodiversity, a new classification and ten new species of a neotropical fern genus. – Bot. J. Linn. Soc. 163(3): 372, f. 8A–C