Polypodium praetermissum Mickel & Tejero
Descripción
Rhizomes creeping, ca. 5 mm diam.; rhizome scales orange-tan, concolorous to somewhat paler at margin, ovate-lanceolate, comose, 2.5–3.5 mm long, margins denticulate; fronds 21–45 cm long, distant; stipes 1⁄3 the frond length, stramineous to castaneous, glabrous;blades pinnatisect, deltate to oblong, 6–12(–18) cm wide, apices pinnatifid or with a subconform terminal pinnae; pinnae (8–)16–28 pairs, linear-deltate, adnate to slightly narrowed at bases, attenuate, glabrous; veins partially and irregularly anastomosing; sori round, median in one row on each side of costae; sporangia glabrous.A
Forma de crecimiento
HierbaA
Forma de vida
On rocks, rarely epiphytic.A
Ejemplar revisado
Dgo (Reeder & Reeder 2473, MEXU, US). Jal (Correll 14362, US; Palmer 374, NY, US). Nay (Breedlove 4550, CAS, MEXU; Feddema 462, NY; González Ortega 4291, MEXU; Mickel 1370, NY). Sin (Breedlove 18573, NY, 44963, CAS; Pennell 20137, PH). Son (Fishbein 1934, ARIZ, 1937, ARIZ; Pennell 19657, PH; Van Devender 98- 1025, NY).A
Distribución
México (país) EndémicoA
Elevación
1100 – 2150 mA
Ecología y Hábitat
Wet north-facing cliffs and rock faces on lava flows and steep arroyos.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The laminar surfaces generally have short hairs on the adaxial costae and rachises, abaxially scattered on laminae and axes; Sonoran specimens are essentially glabrous. Plants from Jalisco and Nayarit have 10–20 pairs of pinnae, whereas those from Sinaloa and Sonora have 8–10 pairs.
Polypodium praetermissum is closest to P. plesiosorum in the casually netted veins, broadly adnate pinnae, and short hairs on the adaxial rachises, but differs in less appressed, comose rhizome scales. Polypodium praetermissum also closely resembles P. subpetiolatum, which can be distinguished by its abundant laminar hairs, toothed pinna margins, and free veins.
Polypodium praetermissum is similar to P. fraternum in its glabrous (or subglabrous) laminae and the irregularly anastomosing veins, relatively few pinna pairs, attenuate pinna apices, and untoothed pinna margins. It differs in the more broadly adnate pinnae, thinner texture, rhizome scales being shorter and comose, presence of some stubby hairs on the costae and laminae, and more northwestern distribution.
A
Polypodium praetermissum is closest to P. plesiosorum in the casually netted veins, broadly adnate pinnae, and short hairs on the adaxial rachises, but differs in less appressed, comose rhizome scales. Polypodium praetermissum also closely resembles P. subpetiolatum, which can be distinguished by its abundant laminar hairs, toothed pinna margins, and free veins.
Polypodium praetermissum is similar to P. fraternum in its glabrous (or subglabrous) laminae and the irregularly anastomosing veins, relatively few pinna pairs, attenuate pinna apices, and untoothed pinna margins. It differs in the more broadly adnate pinnae, thinner texture, rhizome scales being shorter and comose, presence of some stubby hairs on the costae and laminae, and more northwestern distribution.
A