Diplazium calogramma H.Christ




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 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


In wet forest at high altitude.

Proposed IUCN Conservation Assessment

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

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