DlAPENSlACEAE. 155 



3. Leaves white beneath : fruit under 10 mm. V. Oxycoccos. 

 Leaves less whitened : fruit over 10 mm. V. macrocarpon. 



4. Leaves pointed, serrulate, fruit blackih. V. Myrsinites. 

 Leaves blunt or notched, entire : fruit red. V. Vitis-Idaea. 



5. Leaves blunt, small (1.5 cm.) : plant low. V. uliginosum. 

 Leaves acute, or else plants distinctly larger. 6. 



6. Leaves glossy, narrowly revolute, veiny. V. arboreum. 

 Leaves dull or else not revolute. 7. 



7. Leaves small (scarcely 4 cm.) : twigs granular. 8. 

 Leaves larger (often 5 or 6 cm. long). 9. 



8. Loosely villous. V. canadense. 

 Glabrous, or crisp-pubescent in lines. V. pennsylvanicum. 



9. Twigs somewhat granular or wrinkled. 10. 



Twigs not granular : leaves veiny beneath. V. stamineum. 



10. Tall : rather persistently hairy. V. corymbosum. 



Dwarf : twigs and leaves glabrescent. V. vacillans. 



Family DlAPENSlACEAE. 



An insignificant small family. Galax leaves are among the 

 autumnal commodities of florists. 



DIAPENSIA. 



Evergreen . matted low alpine plants with small subopposite 

 crowded sessile glabrous oblong-spatulate entire leaves ; no sti- 

 pules ; perfect white bell-shaped gamopetalous flowers, large for 

 the plant, solitary on slender scape-like peduncles ; and ovoid 

 leathery capsules with small seeds. 



Leaves revolute, outcurved. D. lapponica. 



GALAX. 



Evergreen acaulescent herbs with clustered long-stalked 

 rounded moderate glossy firm leaves bronzing in winter ; small 

 and inconspicuous perfect gamopetalous racemed flowers ; and 

 small capsules. 

 Leaves wavy-margined, blunt, cordate. G. aphylla. 



PYXIDANTHERA. Pyxife. 



Low trailing deciduous suffruticose plants with crowded or 

 alternate small sessile entire leaves; numerous small white or 



