Tropicos | Name - !Zygodon viridissimus (Dicks.) Brid.

Cent. Amer. Moss > Orthotrichaceae > Zygodon > Zygodon viridissimus

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!Zygodon viridissimus (Dicks.) Brid.

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Project Name Data (Last Modified On 3/9/2011)

Acceptance : Accepted

Project data (Last Modified On 3/9/2011)

Discussion:

Zygodon viridissimus is a small plant with leaves that have pluripapillose cells, a costa that ends below the apex, and – in Central America material – consistently entire margins. It is most similar to Z. ehrenbergii, Z. liebmannii or Z. pilosulus in aspect. Zygodon pilosulus differs from Z. viridissimus in having dentate basal leaf margins and well-developed exostome teeth. Zygodon liebmannii differs from it in having leaves with the dorsal costal surface covered in the upper 1/2 to 1/3 by short, papillose cells, and well-developed exostome teeth. Zygodon ehrenbergii is a larger plant than Central American material of Z. viridissimus and it sometimes has a few teeth on its leaf apices. Outside Central America Z. viridissimus can have leaves with 1–2 small apical teeth, (e.g., the European var. dentatus (Breidl.) Limpr.). There seems to be little difference between the types of Z. ehrenbergii and Zygodon viridissimus var. dentatus; they may be synonymous.

Illustrations: Dickson (1801, Tab. 10 18); Smith and Sowerby (1806, Pl. 1583); Bruch and Schimper (1838, Pl. 206); Husnot (1887, Pl. 42); Limpricht (1890, Fig. 213); Dixon and Jameson (1896, Pl. 33 H); Britton (1908, Pl. 6); Malta (1926, Figs 2f, 8 1, 11, 12, Tab 1 A–E, 13, 14, 16, 17, 19 a–d, as Z. rufotomentosus); Grout (1935, Pls. 58 A & 59 C); Mönkemeyer (1927, Fig. 126 a); Nyholm (1960, Fig. 181 &182); Lawton (1971, Fig. 126 9–19, as Z. vulgaris); Smith (1978, Fig. 228 1–4); Crum and Anderson (1981, Fig. 322); Ireland (1982, Pl. 219); Abramova & Abramov (1983, Pl. 40); Crum (1983, Fig. 78); Noguchi (1989, Fig. 257 C); Sharp et al. (1994, Fig. 453 a–g); Abramov and Volkova (1998, Fig. 79 1–9). Fig. 273.

Habitat: On bark of tree trunks (Quercus and Cupressus); 2600–3300 m.

Distribution in Central America: GUATEMALA. Quezaltenango: Sharp 1978 (TENN); San Marcos: Sharp 5384 (TENN). HONDURAS. Lempira: Allen 12280 (MO, TEFH). COSTA RICA. Cartago: Grayum & Dickie 6576 (MO); Heredia: Crosby 9875 (MO); San José: Crosby 9815 (MO). PANAMA. Chiriquí: Allen 9066c (MO).

World Range: Subarctic America, Western and Eastern Canada, Northwestern, North- Central, Northeastern, Southwestern, and Southeastern U.S.A.; Mexico; Central America; Caribbean, Northern South America; Northern, Southwestern, Middle, Southeastern, and East Europe; Siberia, Russian Far East, Caucasus, Mongolia, China, Eastern Asia; Macaronesia, Northern Africa; Indian Subcontinent.