Cololejeunea equialbi Tixier

Sarimi, Muhammad Syafiq, Pócs, Tamás & Lee, Gaik Ee, 2021, Data to the Malaysian liverwort flora, III: New Lejeuneaceae records from Sabah and Peninsular Malaysia, Cryptogamie, Bryologie 20 (19), pp. 249-267 : 253-254

* Cololejeunea equialbi Tixier

( Figs 5 ; 6A, B )

Annales de la Faculté des Sciences, Université de Phnom Penh 3:

178 (1970).

SPECIMEN EXAMINED. — Malaysia. Terengganu: Mt. Tebu Forest Reserve, 15 km S of Jerteh town. Hill dipterocarp forest, area around the summit of Mt.Tebu at 940 m alt., on living leaves, 16.IV.2019, E. Pesiu et al. 1929, 1948, 1954, 1955, 1956; Sabah: Mt. Silam, Sapagaya Forest Reserve, 22 km WSW of Lahad Datu town. Summit ridge of Mt. Silam from the telecommunication towers to the main summit. Lower montane rainforest with Shorea tenuiramulosa and Borneodendron enigmaticum at elevation of 700-800 m alt., on living leaves, 04°57’12”N, 118°9’39”E, 9.VIII.2018, J. Havasi & T. Pócs 1811/AX.

REMARKS

This species is characterized by the small leaf lobule usually with 1-celled first tooth and obsolete second tooth, unicellular stylus, leaf cells with small trigones and indistinct intermediate thickenings, absence of ocelli and vitta, and the widely spreading to retrorsed leaf lobe, 90-160° from the stem. A

widespread Indopacific species ( Dey & Singh 2016); new to Malaysia. Because of its wide distribution, its occurrence in Malaysia was predictable. The species grows exclusively on living leaves ( Zhu & So 2001; Dey & Singh 2016), therefore can be regarded as an obligate epiphyll.

Figures

FIG. 5. — Cololejeunea equialbi Tixier: A, part of plant in ventral view; B, C, leaves; D, marginal leaf lobe cells; E, median leaf lobe cells; F, androecial shoot; G, stem portion, leaf lobule and stylus (hyaline papilla shown in gray); H, perianth; I, female bracts. From E. Pesiu et al. 1955. Scale bars: A, H, I, 0.2 mm; B-D, G, 100 µm; E, 50 µm; F, 0.5 mm.

FIG. 6. — Cololejeunea equialbi Tixier:A, part of plant in ventral view and gemmae; B, part of leaf lobe and lobule. From J.Havasi & T.Pócs 1811/AX. Cololejeunea ensifera Tixier ex L.SÖderstr., Pócs, Váňa & A.Hagborg: C, part of plant in ventral view; D, E, part of leaf lobe, lobule and vitta. From J. Havasi & T. Pócs 1823AL. Scale bars: 50 µm.