lx 



INTRODUCTION. 



alatum, 2; X. Bungei, 208 ; X. planispinum, 211 ; X. schinifolium, 

 212. 



Xiphion, several sp., 8°, 65. 



Yew (Taxus baccata), (b. z.— 0°) 8 (1), 13 (2), 15 (3), (p— 

 10°) 3 (1), 7 (2), 14 (3); uninj., (b. z.— 0°) 8, (1°-10°) 11, 

 (11°— 20°) 7; Obs., soil, dry and wet, 82; var. Irish, (b. z.— 0°) 

 3 (1), 1 (2), 4 (3), 10°) 1 (2), 4 (3) ; uninj., (b. z.— 0°) 3, 

 (1 Q — 10°) 7, (11°— 20°) 10; vars., -lO°,308; soil, dry, 82; 

 wet, 16,34,82. 



Yucca, 0°,38, 1°,35, 2°,32, 8°,124 ; Y. aloifolia, -lO°,304, 0°, 

 274,302, 2°,216, 3°,199,241, 4°,198, 2,63,199,211; uninj., -1°, 

 30, 2°,284, 3o,271, 9°,209,213, 12°,238; Y. angustifolia, 63; Y. 

 baccata, 18 ; Y. filamentosa, 1°,304, 3°,199, 4°,214, 5°,80, 6°, 

 303, 9 Q ,266, 16°,181,187, 18,63,211 ; uninj., 2°,217, 3°,271, 5°, 

 223, 22f,118,201,238; Y. flaccida, 286; Y. gloriosa, 3°,199, 6°, 

 303, 10°,18, 12°,123, 15°,176, 211 ; uninj., 2°,217, 3°,271, 5°, 

 223, 10 w ,7, 12^,123,238, 15°,56, 118,201,210 ; Y. recurva, 4°, 73, 

 5°,319, 15°,55, 16°/mJ181,187; uninj., 15°,56; Y. rupicola, 

 10,18; Y. stenophylla, -1°,41 ; Y. Whipplei, 63,178. 



Zauschneria, 4°,(^)35, 5^,159; uninj, 18 0, 6,183. 

 Zephyranthes, 16°, 181. Zenobia floribunda, 19; Z. speciosa, 

 lO°,19,210. 



Zizyphus sativus, 107. 



