1 59 
Xerophytic Adaptations of Bryophytes. 
19 10 ™ 
Fig. 3. Xerophj'tic Adaptations in Leaf and Stem of Mosses. 1, Gvimmia 
funalis, dry condition, x 15 ; 2, G. funalis, moist condition, x 15 ; 3, Tortula 
muralis, leaves spirally twisted when dry, x 15 ; 4, T. muralis, moist condition, 
x 7 ; 5, T. muralis, leaf of normal plant, x 15, also papillose cells and cells’of 
lower part of leaf ; 6, T. muralis var. rupestris, of damper habitat, x 15 ; 7, T. 
muralis, leaf of plant from side of well, x 15 ; 8, plicate leaf of Campothecium 
sericeum, x 15 ; 9, undulate leaf of Neckera crispa, x 15 ; 10, leaf of Weisia 
viridula, with involute margin, x 15; 11, apical portion of same, x 70; 12, 
leaf of Tortula ruralis, showing the revolute margin and rhizoids at base, x 15 ; 
13, falcate leaf of Hypnum molluscum, x 15 ; 14, leaf of Fissidens taxifolius, x 15; 
15, cucullate leaf of Tortula ambigua, x 15; 16, section of same, showing inflexed 
margin and assimilating cells, x 45 ; 17, assimilating cells of same, with 
chloroplasts, x 150 ; 18, leaf-cells of Pterygophyllum lucens, a moss of moist 
situations, x 300; 19, leaf-cells of Andrecea Rothii, a moss of mountain rocks, 
x 300; 20, leaf-cells of Ulota HutchinsicB, a moss of siliceous rocks, x 300 ; 21, 
sinuose-walled cells of Rhacomitrium canesceus, x 300 ; 22, transverse section of 
stem of Leptobryum pyriforme, showing the unequal thickening of the cortical 
cells (thick-walled on naked parts but thin walled when shaded by the leaf- 
bases), x 200; 23, transverse section of stem of Camptothecium sericeum, x 200 ; 
24, transverse section of stem of Thuidium tamariscinum, x 75, also outer and 
inner cells, x 300 ; 25, paraphyllium of same, x 300. 
