Marchantia emarginata
This species is immediately recognized by the cup-shaped receptacles, containing discoid gemmae on dorsal side of thallus surface; margins of appendage of median scale sharply toothed mostly 2-3 celled, with terminal cell often lighter in color and curved towards base of appendage; female receptacles on long stalk, 5-12 lobes, apex of the lobes emarginated.
Thalli yellowish-green, broad, dichotomously branched, with air chambers; margins crispate, purplish to hyaline; ventral scale appendages, ovate, irregularly purplish margins minutely denticulate; compound pores arranged in 4-7 concentric ring cells; rhizoids smooth and tuberculate; midrib distinctly developed; epidermal cells smaller than inner cells; ocelli cells scattered, brownish, compound, spherical; gemmae cups rounded, cupule margins laciniate with 1-5 uniceriate cells, dorsally, bearing numerous, rounded gemmae; male receptacles 4-8 lobed, asymmetric; female receptacles with 5-12 emarginate lobes.
Africa, South America, India, China, Hong Kong, Japan, Indonesia, New Caledonia, and Thailand (Bischler-Causse, 1989).
On soil near concrete channels in disturbed places in primary, evergreen, seasonal, hardwood forest; granite bedrock, Pu Ping Palace, c. 1,400 m elevation; on soil and rocks in mixed evergreen+deciduous, seasonal hardwood forest, granite bedrock, Huay Pah Laht (stream), c. 750 m elevation; on soil and rocks in deciduous dipterocarp-oak, seasonal, hardwood forest, granite bedrock, Mawk Fa Falls, c. 567 m elevation, Daht Mawk Falls, c. 544 m elevation, Daht Krok Falls, c. 440 m elevation, Mae Sa Falls, c. 417 m elevation.