ee The External Form of Plants. 93 
form, sometimes not, as in the common buttercup (Fig. 148). 
So-called perfolvate leaves, as in Bupleurum rotundifolium (Fig. 
Fic. 149.—Perfoliate leaf of Bupleurum 
rotundtfolium. 
Fic. 148.—Amplexicaul leaf of the 
buttercup, with petiole expanded 
at the base. 
A\\ 
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Fic. 151.—Decurrent leaf of Sysephytuse ofi- 
Fic. 150.—Connate leaves of the cinale, the stem hence becoming winged on 
honeysuckle. one side. 
149), or connate leaves, as in the common honeysuckle (Fig. 
150) jor Chlora perfoliata], are varieties of the amplexicaul 
