GYMNOSTOMUM. 81 



2. Gymnostomijm Lapponicum, Hedw. [Lapland Beard- 

 less Moss.) Leaves linear-lanceolate, channelled on the 

 upper side along the pellucid nerve, crisped when dry, those 

 of the pericliEetium broadly ovate, convolute ; capsule sub- 

 exserted, turbinate, furrowed. — Engl. Fl. p. 7. Zygodon 

 Lapponicus, Mi'dl. Sijn.pt. \. p. 680. 



Abundant on the summits of the higher mountains of 

 Scotland; it has also been found on Snowdon, and is not 

 rare on the range of the Alps. Fr. July. It only bears 

 fruit at high altitudes, growing in the crevices of rocks. In 

 mild and moist situations it is barren, and produces stems 

 three to five inches long. 



3. Gymnostomum viuiDissiMUM, Sm. [Green Tufted 

 Beardless 3Ioss.) Leaves broadly lanceolate, patent, dotted ; 

 capsule ovate, furrowed when old, lid obliquely rostrate. — 

 Engl. Fl. p. 7. Zygodon viridissimus, 3I/ill. Spi. pd. 1. 

 p. 671. 



On trees, — according to MiiUer and Schimper, chiefly 

 on oaks and chestnuts, — and more abundant in the south 

 of England than further north. In Scotland it has been 

 found on rocks in several locaKties. The leaves are of a 

 pale yellow-green and are beautifully dotted. In habit it 

 resembles an Orthotrichum. The absence of a peristome is 



G 



