Calypogeia integristipula Steph., Bull. Herb. Boissier ( ser . 2) 8 (9): 662 (394). 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

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Calypogeia integristipula Steph., Bull. Herb. Boissier ( ser . 2) 8 (9): 662 (394). 1908.


Calypogeia integristipula Steph., Bull. Herb. Boissier ( ser. 2) 8 (9): 662 (394). 1908. Figure 7G-I View Figure 7


Germany. Saxonia: July 1888, F. Stephani (lectotype, designated by Bonner (1963) and followed by Grolle (1976): G [G00061108/26879!]).


This is a generally boreal circumpolar species widely spreading to hemiarctic and hemiboreal zones and southward in corresponding belts in the mountains (especially in Japan, although surprisingly not known in China and the Korean Peninsula). The description based on the lectotype is as follows: plants 2.2-3.0 mm wide, soft, greenish to yellowish greenish, loosely translucent; stem 200-300 µm wide, freely ventrally branched with 1-2 branches from one underleaf sinus; rhizoids common, in obliquely spreading brownish fascicles; leaves very obliquely inserted, not or barely decurrent ventrally, contiguous to overlapping 1/4 of above situated leaf in the leaf base, slightly convex to nearly planar, ovate to obliquely ovate, 1200-1900 × 1000-1500 µm, with rounded apex; underleaves appressed to the stem, retuse to emarginate at apex, 1.7-2.5 as wide as stem; midleaf cells thin-walled, trigones vestigial, cuticle smooth to very finely verruculose, 37.5-70.5 × 32.5-55.0 µm.