ITEPATICS IN WEST COHXAVALL It 



downwards, while the thickened stems of F. CrozaUil lie more hori- 

 zontally. The inflorescence of J'^. Crozalsli is probably heteroicous,. 

 as suggested by Miiller, but some of the stems are clearly monoicous, 

 as fruiting stems in cultivation have produced numerous antheridia in 

 the autumn. 



Fossombronia Hnsnoti var. anglica Nicholson. Moist heathy 

 ground between Housel Bay and Kynance Cove. The plant was 

 growing in very small patches, but it otherwise agrees well with 

 that which I gathered at Babbacombe Bay (Journ. Bot. Hi, (1914) 

 p. 106). In this plant also the spores are considerably larger than 

 they are in the typical F. Husnoti from the Continent. 



Dicliitoii ccdyculatum (Dur. &Mont.) Schft'n. A small gathering 

 from moist earth on the trap rocks at Carbis Bay, with old and young 

 peiianths. one of which developed a young capsule on cultivation. 

 This plant, which appears to be everywhere rare, is an interesting 

 addition to the British hepatic flora. It was originally recorded 

 from Algeria, but it has since been found in Dalmatia, Italy, and 

 the South of France, while I have gathered it myself very sparingly 

 in Southern Portugal. I append a description ; — 



DiCHiTO^s^ CALTCULATUM (Dur. & Mont.) Schffn. Monoicous. 

 Plant small, 1-2 mm. long, dark or brownish green. Stem usually 

 squarrosely branched with few rhizoids. Leaves small, distant, here 

 and there wider and a^jproximate, accrescent towards the perianth, 

 where they are three to Ave times as large, closely imbricated, divided 

 by a sharp-angled sinus to \-\ into two, frequently unequal, lobes, 

 Underleaves rare, only present on stems bearing the $ indorescence, 

 lanceolate. Leaf-cells 15-18 /u towards the apex, marginal cells 

 usually smaller, averaging about 12 /*, in the middle of the leaves- 

 lo-20 /i, roundish, somewhat incrassate, as are the cells of the 

 bracts and perianth ; the uppermost pair of the 5 bracts con-- 

 nate, rarely the second and third pairs also. Perianth cylindrical, 

 rather deeply 5-plicate towards the somewhat contracted mouth, half 

 raised above the uppermost bracts ; cells of the mouth roundish, 

 incrassate. Seta 2-5 mm. long, formed of four rows of cells. 

 Capsule oval, about 0*5 mm. long, divided into four red-brown 

 lobes. Capsule-wall with cells in two layers; cells of the outtir 

 layer with knotty wall-thickenings, with semi-circular threads. 

 Spores flnely papillose, 9 y in diameter, red-brown. Elaters elongate, 

 7 f.1 broad and 200-250 yu long with a double narrowly-twisted red- 

 brown spii-al. Male branch below the $ inflorescence, d catkin 

 short, bracts scarcely hollowed with pointed or obtuse, often toothed 

 lobes, cell- walls less incrassate than in the rest of the leaves. An^ 

 theridia large, shorth^ stalked, single. Spores ripe in October, 

 Gemma3 rare, angular with 5 or 6 points. 



The above diagnosis is partially borrowed fi-om that of K. Miiller, 

 and the description of the mature capsule, which I have not seen, is- 

 wholly taken from his. He speaks of the connection between the 6 

 and $ inflorescence as being diflicult to prove ; but I did not find thi* 

 the case with the Carbis Bay plant. Most of the stems had young 

 $ bracts, and the short branch with the 6 inflorescence was not 

 infrequently easy to observe on the same stem. 



