444 BOTANICAL GAZETTE [DECEMBER 
Fic. 2.—Root stele of Agrostis canina var.; letters as above. 560. 
Fic. 3.—Root stele of Festuca ovina; letters as above. 560. 
Fic. 4.—Root stele of Poa flexuosa; letters as above. 560. 
Fic. 5.—Part of root stele of Agropyrum Scribneri; letters as above. 560. 
Fic. 6.—Cross-section of part of culm of Poa Lettermanni, showing epider- 
mis (Ep), cortex he arene (St), and two mestome strands with their mestome 
sheaths (MS). X 
1G. 7 sea é Spates: cross-section of leaf, ee: ventral epidermis (Ep) 
with a stoma, and two strata of chlorenchyma (C). X 
Fic. 8.—Same species; cross-section of leaf, Stovig dorsal ‘epidermis (Ep), 
hypodermal stereome (S#), and chlorenchyma (Ca). X 
