Calypogeia apiculata (Steph.) Steph., Bull. Herb. Boissier ( ser . 2) 8 (9): 668 (400). 1908.

Bakalin, Vadim A., Klimova, Ksenia G. & Nguyen, Van Sinh, 2020, A review of Calypogeia (Marchantiophyta) in the eastern Sino-Himalaya and Meta-Himalaya based mostly on types, PhytoKeys 153, pp. 111-154 : 111

Calypogeia apiculata (Steph.) Steph., Bull. Herb. Boissier ( ser. 2) 8 (9): 668 (400). 1908. Figures 2D, E ; 3H, I

= Calypogeia gollanii Steph. ex Bonner Index Hepaticarum, 1963. nom. inval. (Art. 38.1(a); no description). Authentic material (invalid names have no types): India. NW Himalaya: Mussoorie W. Gollan 01 Nov 1900 (original material, probably scheduled as the type): G [G00067720/23987!*] Syn. nov.

Basionym.

Kantius apiculatus Steph., Hedwigia 34 (2): 51, 1895.

Type.

Java. Prof. Stahl (Lectotype (designated here): G [G00061103!]).

Remarks.

The species was originally described from Java ( Stephani 1895) and recorded from Borneo ( Chuah-Petiot 2011) and Sri Lanka ( Long and Rubasinghe 2014). Calypogeia gollanii in India is the synonym of C. apiculata . Although Calypogeia gollanii is regarded as the synonym of C. azurea in the https://bryophyteportal.org/, the plants correspond in all ways to C. apiculata Steph., although the leaf cuticle is very loosely (although obviously) papillose. Calypogeia azurea does not occur in East Asia ( Buczkowska et al. 2018) and has much wider underleaves. Calypogeia apiculata may also be mistaken for C. sphagnicola (due to small underleaves) - generally Sphagnum swamp species that could hardly be expected in the Sino-Himalaya. In addition, Calypogeia sphagnicola has highly distanced and smaller leaves and smooth leaf cuticles. Presumably, the reports of C. sphagnicola in China may actually represent C. apiculata .

The description based on the lectotype of C. apiculata is as follows: plants 1.0-2.2 mm wide, 3-5 cm long, pale yellowish brownish in the herbarium; stem ~180 µm wide; rhizoids sparse to numerous in obliquely spreading fascicles, leaves distant to contiguous, nearly planar to slightly convex, rarely incurved to dorsal side (probably due to long drying and repeated soaking), 600-1100 × 450-800 µm, obliquely ovate, apiculate, very rarely shortly bidentate, decurrent in ventral base for 0.5-1.0 of stem width; underleaves as wide as stem or slightly wider, bilobed, undivided portion (1-)2 cells high, lateral teeth absent, decurrent for 1/3 of stem width or less; cuticle in leaves and underleaves very finely verruculose; cells in the midleaf 37-58 × 25-35 µm, thin-walled, trigones very small and concave.

Figures

Figure 2. Calypogeia aeruginosa Mitt.: A plant habit, fragment, ventral view Calypogeia angusta Steph.: B leaf C underleaf Calypogeia apiculata (Steph.) Steph.: D plant habit, fragment, ventral view E leaf apex Calypogeia arguta Nees et Mont.: F plant habit, fragment, ventral view Calypogeia cordistipula (Steph.) Steph.: G underleaf H plant habit, fragment, ventral view I leaf J leaf margin cells K leaf middle cells. Scale bars: 1 mm (A, F); 500 µm (B, D, G); 200 µm (C, G); 50 µm (E, J, K); 2 (N); 2 mm (H). A from Isotype G 00064244 / 5286; B, C from Lectotype G 00067716; D, E Holotype G 00061103; F Holotype STR (n. 163); G-K from Lectotype G 00061105 / 10811.

Figure 3. Calypogeia angusta Steph.: A plant habit, fragment, ventral view B, C, D underleaves E, F, G leaves Calypogeia apiculata (Steph.) Steph.: H plant habit, fragment, ventral view I plant habit, fragment, ventral view Calypogeia arguta Nees et Mont.: J plant habit, fragment, ventral view Calypogeia cordistipula (Steph.) Steph.: K plant habit, fragment, dorsal view L plant habit, fragment, ventral view M, N leaves O, P underleaves. A-G from Lectotype G 00067716; H, I lectotype G 00061103; J holotype STR (n. 163); K-P from Lectotype G 00061105 / 10811.