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EXPLANATION OF PLATE XII. 
Fig. 
1. Part of a transverse section of a leaf of Erianthus Sorghum, preserved in for- 
malin, stained in methyl violet and Bismarck brown. 
2. Part of a transverse section of a leaf of Digitaria sanguinalis, var. ciliaris. As 
in Fig. 1. Both figvires are drawn to approximately the same scale. Fig. 1 
was kindly drawn by Mr. R. H. Compton. 
In both figs. .- v, vessel : t, tracheid ; p, phloem ; b s, bundle sheath ; c, chloren- 
chyma ; c.2, chlorenchyma with few chloroplasts ; ep, epidermis ; e f, epidermal fibres ; 
st, stoma ; /, fibres in bundle ; /.,, fibres outside bundle ; h, hairs ; lu s, water-storage 
tissue. 
