118 



The Irish Nattiralht. 



July. 



Leaf-tips distinctly flattened. Leaves furnished 

 with 0-8 bladders. = 3. V . intermedia. 4. V . 

 ochrolenca. 5. U. minor. 6. U. Brcmii. 



B. 



Bladders found chiefly on subterranean shoots. The 

 green leaves bear solitary bladders or none. Leaves with 

 7-15 segments. Subterranean leaves with 0-3 bladders. 

 Leaf-tips toothed on margin. Winter bud wrapped in a 

 thick whitish tomcntum. Bud-leaves palmately divided. 

 Segments indented on margin and armed with hair -bristles 

 standing together in tufts. = 3. U. interincdia. 4. U . 

 ochroleuca. 



BB. 



Floating green assimilating, and colourless subterranea 

 shoots about equally provided with bladders. Leaves 

 ending in 14-20 segments and furnished with 0-8 bladders. 

 Leaf-tip smooth on margin. Winter buds not covered 

 with a hairy mantle. Bud-leaves palmate, with some 

 dichotomous end-segments. The margin of the bud-leaves 

 is neither indented nor provided with tufts of hair. 

 := 5. U. minor. 6. U. Brcmii. 



AA. 



I. U. VULGARIS L. 



Pedicels two to three times as long 

 as calyx (7-12 mm.), recurved 

 and reflexed after llowering. 



Corolla upper lip about as long as 

 the projecting bilobed palate. 



Lower lip much larger than upper 

 with reflexed margins which 

 scarcely project beyond the 

 palate which is marked with a 

 few separate pale red lines. 



Anthers connate. 



Spur adpressed to lower hp. 



Leafy branches often very long, 

 somewhat coarse. 



Winter buds large (10 mm.), nearly 

 globular or globular ovoid. 



2. U. MAJOR, Keller. 

 Pedicels four to six times as long as 

 calyx (12-30 mm.) straight and 

 ascending after llowering. 



Corolla upper lip twice or thirce as 

 long as the projecting bilobed 

 palate. 



Lower lip with a broad flat 

 spreading margin which pro- 

 jects greaty beyond the palate, 

 is not reflexed, and is marked 

 with chocolate brown lines. 



Anthers free. 



Spur conical, sub -compressed, not 

 adpressed to lower lip. 



Leafy branches usually slender. 

 Winter buds. 



