PLATE 27 



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160. / pomaa coccinea Section of upper epidermis at base o i if ; over a vein, showing lon( 



Itil. I pomaa quamoclit. The same, showing no papilla 1 ovei veins. 



162. Ipomaa loteri. The same, showing smaller papilla? along vein and thai the stomal ghtly more 



numerous at thi 



163. Ipomaa Section of epidermis al u ing short glandular shagg\ hairs 

 Itil I pomaa quamoclit. The same, showing much longer glandular shaggy hairs. 



lii."i Ipomaa I'ln same, showing glandular shagg) hairs of intermediate length 



