Ferns of Thailand, Laos and Cambodia

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Family

Athyriaceae

Nomenclature

Diplazium calogramma Christ, Notul. Syst. (Paris) 1: 45. 1909; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 264. 1939. – Allantodia calogramma (H.Christ) Ching, Acta Phytotax. Sin. 9: 54. 1964.

Description

Description from Wang Zhong-ren et al., Athyriaceae Flora of China draft. http://flora.huh.harvard.edu/china/mss/volume02/Athyriaceae-MO-part1_coauthored.htm

Plants evergreen, large. Rhizome creeping, scales at apex sparse and adpressed; scales dark brown, lanceolate or broadly lanceolate, margin black, small toothed; fronds approximate. Fertile fronds more than 2 m; stipe slightly brown or black-brown at base, upward dark stramineous or green-stramineous when dry, shorter than lamina, 60–90 cm, ca. 1 cm in diam., lower part sparsely scaly; scales similar to those on rhizome apex, deciduous, upward glabrous; lamina 2-pinnate with pinnules pinnatifid to pinnatipartite, ovate-deltoid, 110–120 × 70–80 cm, apex acuminate; pinnae more than 15 pairs, alternate, ascending, apex pinnatipartite, acuminate; lower pinnae oblong-lanceolate or broadly lanceolate, 30–50 × 10–20 cm, pinnate, with stalk 2–5 cm; upper pinnae lanceolate, pinnatilobate or pinnatipartite; pinnules 8–15 pairs, often alternate, spreading or slightly ascending, not contiguous, lanceolate, 3–12 × 1–3 cm, symmetric or nearly so, base broadly cuneate, shortly stalked, pinnatipartite to pinnatifid, apex caudate; pinnule lobes 8–15 pairs, slightly ascending, not contiguous, margin subentire or few sparsely serrate, apex often rounded; veinlets pinnate in pinnule lobe; veinlets 9 pairs, often simple, rarely forked, ascending, not reaching margin, apex slightly swollen. Lamina thinly herbaceous, green; rachis and costa green-stramineous; costae and costules abaxially with prominent fleshy green aculeate processes, and few brown lanceolate scales, glabrous adaxially. Sori linear, often as long as veinlets, 8 pairs per pinnule lobe, often single or double on basal acroscopic veinlet; indusia brown when mature, membranous, entire. Spores reniform, granulate ornamentation on surface.

Distribution in Laos

Xieng Khouang.

Wider Distribution

S China, Vietnam

Ecology

In wet forest at high altitude.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is fairly widespread and not under any known threat.

	Ferns of Thailand, Laos and Cambodia
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Diplazium calogramma H.Christ Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17 Family Athyriaceae Nomenclature Diplazium calogramma Christ, Notul. Syst. (Paris) 1: 45. 1909; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 264. 1939. – Allantodia calogramma (H.Christ) Ching, Acta Phytotax. Sin. 9: 54. 1964. Description Description from Wang Zhong-ren et al., Athyriaceae Flora of China draft. http://flora.huh.harvard.edu/china/mss/volume02/Athyriaceae-MO-part1_coauthored.htm Plants evergreen, large. Rhizome creeping, scales at apex sparse and adpressed; scales dark brown, lanceolate or broadly lanceolate, margin black, small toothed; fronds approximate. Fertile fronds more than 2 m; stipe slightly brown or black-brown at base, upward dark stramineous or green-stramineous when dry, shorter than lamina, 60–90 cm, ca. 1 cm in diam., lower part sparsely scaly; scales similar to those on rhizome apex, deciduous, upward glabrous; lamina 2-pinnate with pinnules pinnatifid to pinnatipartite, ovate-deltoid, 110–120 × 70–80 cm, apex acuminate; pinnae more than 15 pairs, alternate, ascending, apex pinnatipartite, acuminate; lower pinnae oblong-lanceolate or broadly lanceolate, 30–50 × 10–20 cm, pinnate, with stalk 2–5 cm; upper pinnae lanceolate, pinnatilobate or pinnatipartite; pinnules 8–15 pairs, often alternate, spreading or slightly ascending, not contiguous, lanceolate, 3–12 × 1–3 cm, symmetric or nearly so, base broadly cuneate, shortly stalked, pinnatipartite to pinnatifid, apex caudate; pinnule lobes 8–15 pairs, slightly ascending, not contiguous, margin subentire or few sparsely serrate, apex often rounded; veinlets pinnate in pinnule lobe; veinlets 9 pairs, often simple, rarely forked, ascending, not reaching margin, apex slightly swollen. Lamina thinly herbaceous, green; rachis and costa green-stramineous; costae and costules abaxially with prominent fleshy green aculeate processes, and few brown lanceolate scales, glabrous adaxially. Sori linear, often as long as veinlets, 8 pairs per pinnule lobe, often single or double on basal acroscopic veinlet; indusia brown when mature, membranous, entire. Spores reniform, granulate ornamentation on surface. Distribution in Laos Xieng Khouang. Wider Distribution S China, Vietnam Ecology In wet forest at high altitude. Proposed IUCN Conservation Assessment Least Concern (LC). This species is fairly widespread and not under any known threat. Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17
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