249 
Leioscyphus humilis [Hook. f. & Tayl.| Pearson. Dioicous. 
Small, pale brown in colour, caespitose. Stems simple or slightly 
branched, branches postical or rarely postico-lateral, ascending 
iat frontally compressed, 30 cortical cells, dark coloured but 
milar in size to inner, which are 12 x 8 cells in diameter; 
rhizoids ascending to apex of stem, delicate, hyaline. Leaves 
horizontally inserted, imbricate, concave, secund, antical (lower) 
margin slightly decurrent, postical (upper) often extending a 
little beyond the stem; orbicular or broadly ovate, entire or 
slightly retuse; cells minude, roundish, walls thin, trigones dis- 
tinct. Underleaves free from the leaves, large (patulous), concave, 
oval or broadly oval, bifid to 4, sometimes trifid, segments acute, 
sinus rounded or acute, sometimes unidentate on one side. 
No 6 or @ seen. 
Dimensions: Stem 1 em. long; with leaves 0-75 mm. wide; 
0-1 mm. to 0-2mm. diameter; leaves 0-75 mm. X 0-75 mm., 
0-65 mm. X0-75 mm.; cells 0°015 mm.; underleaves 0-5 mm. x 
0-4mm.; segments 0-15 mm., 0-5 mm. X 0-3 mm., segments 
0-15 mm. 
Kerguelen’s Land: 1846, J. D. Hooker, in Herb. Kew. 
Observations. The postical branches, free underleaves, and 
texture clearly refer this species to Leioscyphus instead of to 
Lophocolea to which genus Stephani has referred it 
Of course it has no connection with the Solenostoma humilis 
of Mitten, if such a species exists. 
< 
6 
ig. 1. Portion of stem, postical view 
3, 4. Leaves (X 25). 5. Leaf 
7-9. Underleaves 
Hewerigion: of Text poi Fig 
(x 12). 2. Cross-section of s meet 5). 
& underleaf (x 25). 6. Portion of leaf (x 130). 
{X 25). 
