Plagiochasma intermedium Lindenb. & Gottsche

Plagiochasma intermedium I^indenb. & Gottsche; G. I^. N. Syn
Hep. 513. 1846.
Rupinia intermedia Trevisan, Mem. 1st. Lomb. 13; 437. 1877. Aytonia intermedia Underw. Bot. Gaz. 20: 66. 1895. Aytonia japonica Stephani, Bull. Herb. Boiss. 5: 84. 1897. Plagiochasma japonicum Massal. Mem. Accad. Verona 73: 47. 1897.
Thallus pale-green above but not glaucous, with a narrow purple border, plane or broadly canaliculate, with a broad rounded keel and undulate-crenate margins, mostly 1-2 cm. long and 3-5 mm. wide, sometimes forking but usually innovating at the apex and often with ventral branches; epidermal cells about 25 ^ in diameter, with small trigones and a thin smooth cuticle; pores distinctly elevated, surrounded by about 8 radiating series of cells with 2-4 cells in each series, the radial walls strongly thickened; green tissue loose; ventral scales purple with one or, more commonly, two lanceolate to ovate appendages, usually acute, entire, scarcely constricted at the base. Autoicous; male receptalces borne near the apex of a branch; 43
female receptacles borne singly or in a short median row, the stalk mostly 1-2 mm. long, the disc about 3 mm. wide, concave, with usually 2 or 3 apiculate lobes, the paleae lanceolate, acute to acuminate, usually entire; spores yellowish-brown, mostly 60-70 fi in diameter, minutely verruculose, sometimes reticulate and sometimes with only a few irregular surfaceridges not forming a network; elaters mostly 9-12 m wide, the walls usually strongly and uniformly thickened, rarely showing traces of spiral hands.
Type i^ocality: Hacienda de Jovo. Veracruz. Distribution: Mexico and Guatemala; also in Japan. ILI.USTRATIONS : Bull. Torrey Club 42; 303./. 8.

Plagiochasma intermedium is a liverwort species in the genus Plagiochasma found in China.

Riccardin C, a macrocyclic bis(bibenzyl), can be found in P. intermedium.