EXPLANATIONS AND REFERENCES, 

 PLATE CCV. 



Figures mostly magnified 250 diameters. 



PAGE. 



Fig. 1. MlCROCOLEUS ANGUIFORMIS ..... 306 



Figs. 2, X. MICROCOLEUS HETEROTRICHUM, forma Americana, younger con- 

 dition, . . . 307 



Fig. 4. more advanced condition show- 



ing the two kinds of trichomes, 

 sheath smooth, . . 308 



" 5. older filament with sheath lam- 



ellate and fihrillose, . 308 



Figs. 6, 7. ISACTIS FLUVIATILJS, . . . . 244, 245 



Fig. 8. SYMPLOCA LUCIFUGA, two vertical fascicles greatly magnified, 303 



Figs. 9, 10. " " natural size of plants, . . . 303 



" 11,12. " " single trichomes in sheaths, . . 303 



Fig. 13. SYMPLOCA FRIESIANA, a caespitose cluster, . . . 304 



Figs. 14, 15. single filaments from the cluster, with a 



single trichome, . . . 304 



in, 17. MICROCOLEUS TERRESTRIS, Var. repens, from moist earth, . 305 



