APPENDIX. 



THE Willows offer such peculiar difficulties, owing to 

 their being dioecious (apart from the even greater diffi- 

 culties of their hybrids and varieties, which cannot be 

 touched on here), that I have drawn up the two following 

 schemes to facilitate diagnosis when the flowers of one 

 sex only are available. These tables may then be employed 

 in connection with the scheme of classification given above. 



A. CLASSIFICATION OF WILLOWS WHEN $ CATKINS 



ALONE ARE AVAILABLE. 



(1) Catkins terminal or sub-terminal on the 

 current shoots, pedunculate ; dwarf or creep- 

 ing rare northern plants. 



(a) Catkins short (rarely to 25 x 5 mm.) with a long, 

 hairy peduncle, 822x45 mm.; scales velvety - 

 ciliate, concolor, persistent; capsule sub-sessile, 

 hairy ; style short ; gland 1, bifid or urceolate and 

 slit so as to look like 34; leaves small, on long 

 petioles, rounded and reticulate. Branches smooth, 

 short. 



Salix reticulata, p. 206. 



(b) Peduncle short, catkin 10 x 5 mm. Scales gla- 

 brescent-ciliate, discolor or hardly so; gland 1, 

 posterior; capsule sub-sessile, glabrous; style 

 short; leaves petiolate rounded, glabrous, with 

 pellucid venation. Dwarf willow, with small 

 catkins, loose-flowered, immersed in leafy ends 

 of the shoots. Scales concolor. 



Salix herbacea, p. 206. 



