92 BOLDO LEAVES. 



The leaves are opposite and borne on short petioles. They are 

 oval, obtuse at both apex arid base, coreaceous, strong and rough. 

 The lower surface of the leaf, fig. i, a, is marked by prominent 

 midrib and veins, even the minute net-work of veins showing. The 

 hairs add to the roughness of the lower surface. The upper sur- 

 face, b, is more glossy and is thickly studded with small whitish pro- 

 jections. The dried leaves have a reddish-brown color with a fra- 

 grant odor and a refreshing aromatic taste. The lower surface of 

 the leaf, when examined with the microscope, is found to be com- 

 posed of the usual epidermal cells, see a, fig. 2, quite uniform in 

 size and appearance, while the stomates b, are like those of other 

 leaves. Each stomate, however, is surrounded by four epidermal 

 cells. The hairs found on the under side of the leaf are not very 

 numerous or uniform in size or appearance. They are multicellular 



Fig. 2. Lower Epidermis and Stomates. a, Epidermal Cells, b, Sto- 

 mates. Mag /lifted 350 Diameters. 



and stellate with many points. The same are seen in fig. 3 more 

 highly magnified. They are not borne on a pedicle or stem, but 

 directly from the lower epidermis, as seen at a, fig. 4. The hairs 

 found on the upper surface of the leaf are unicellular, long, slen- 

 der, and borne on an enlarged multicellular base, formed only of 

 epidermal cells. These hairs are so easily brushed off the leaf that 

 in the commercial leaf the projections are generally found without 

 the accompanying hairs. 



Fig. 4 represents a cross section of the leaf, showing the rela- 

 tions of the projections and hairs to the rest of the leaf. One can 



