Spore Morphology of the Pteridaceae II. The Gymnogrammoid Ferns

Taxonomy and spore morphology of genus Adiantum (Vittarioideae; Pteridaceae) from Pakistan

“…Comparison of our results with earlier studies of Adiantum species from other countries suggests that spore morphology is extremely helpful and an important taxonomic tool for the accurate species. The spore of Adiantum capillus‐veneris was trilete, triangular at distal side, contains triangular laesura arms in proximal view, equatorial side hemispherical with equatorial flange at the middle, surface tuberculate, size 35–42 × 38–45 μm, perispore dark brown, translucent, with faintly granulose surface, that agrees with the earlier results of (Jiaxi, 1997; Nayar & Devi, 1967). Salimpour, Nazi, and Mazooji (2011) reported spore size 35.4 × 41.4 μm, with circular shape and rugulate‐gemmate ornamentation from Iran; Mazooji and Salimpour (2014) reported spore size 38 × 44.5 μm, with circular shape, trilete aperture, and rugulate ornamentation from Iran; while Yumkham, Singh, and Khomdram (2017) reported spore size 42 × 57 μm, with granulose surface from North‐East India; Murtaza et al (2006) reported spore size 37 × 47 μm from Pakistan.…”

“…The spore of A. incisum subsp. incisum were trilete, triangular in proximal and distal view, spheroidal, hemicircular in equatorial view, size 36–42 × 40–45 μm, perispore dark brown, with granulose and tuberculate, faintly rugulose surface, that agrees with the previous studies of (Nayar & Devi, 1967; Tryon & Lugardon, 1991, 2012); while Yumkham et al (2017) reported spore size 35 × 40 μm, with densely verrucate surface. The spore of A. pedatum subsp.…”

“…The spore morphology of Adiantum species observed under SEM represents variations in size, shape, aperture, exospore thickness, and surface ornamentation, as described in many previous studies (Dai, Wang, & Yu, 2005; Kovalska, 2013; Large & Braggins, 1985, 1991, 1993; Prado & Hirai, 2013; Tryon & Lugardon, 1991, 2012). The spores of Adiantum taxa are usually trilete and triangular in proximal and distal view, spheroidal, ellipsoidal, hemicircular in equatorial view; spore surface is often cristate, globose, reticulate, and tuberculate (Jiaxi, 1997; Nayar & Devi, 1967; Schuettpelz, Davila, Prado, Hirai, & Yatskievych, 2014; Wang et al, 2017).…”

“…The terminology of spore morphology, ornamentation, and surface was followed according to Erdtman (1957, 1960); Nayar (1964); Nayar and Devi (1966, 1967) and Punt, Hoen, Blackmore, Nilsson, and Le Thomas (2007).…”

Spore morphology of Haplopteris C. Presl species (Vittarioideae, Pteridaceae) from China

“…H. linearifolia (Fig. 2, A-D In contrast with most Pteridaceae species having tetrahedral trilete spores with very distinctive sculpture, that were described in multiple papers (Sladkov, 1961;Nayar, Devi, 1967;Tryon, Lugardon, B., 1991;Demske et al, 2013;Kuznetzov et al, 2014;Vaganov, 2016;Vaganov et al, 2017a, b, c, d), Haplopteris species has bilateral monolete spores. Spores of four examined species are very similar in shape to each other.…”