THE AMERICAN BOTANIST 5 



everywhere along roadsides, in pastures, and in the woods and 

 other waste grounds, where it i^. exposed to injury on all sides. 

 Some of the most interesting of epidermal structures are 

 the scales of such plants as Shepherdia and Dcutcia. In those 

 of Shepherdia (fig. a.) the several cells are arranged 

 in a rosette while in Deutzia they are star like and 

 have a toothed edge. Some are five parted, and others 

 eight parted, with rounded points scattered through- 

 out. The geranium has two different forms of hairs, 

 namely the simple (fig. e), and glandular (fig. c). These are 

 not confined to any special part of the leaf. They are inter- 

 mixed. The simple are one celled hairs, with very sharp tips. 

 The others are many celled, and have a globular cell at the tip 

 which is glandular. This cell gives out a fragrant oil that is 

 so familiar to us, when the plant is bruised. The hairs of 

 the mullein are rather more complex than any I have men- 

 tioned because they are not continuous in one direction, but 

 each small hair seems to be jointed to a large central hair, the 

 smaller hairs, six in number, joining the central hair at regu- 

 lar intervals, and forming a circule around it. The tip of the 

 hair is globular in shape, and has one celled hairs projecting 

 from all sides. In the Dame's violet (fig. h) the hairs are 

 forked instead of single, forming two sharp points. This 

 saves space, and does twice the work of the simple continu- 

 ous hair. The epidermal hairs of the Hollyhock are very 

 symmetrical in shape having five regular parts, radiating from 

 the center, and a sheathlike cell at the base binding them to- 

 gether. The stamen hairs of Tradescantia are the most pe- 

 culiar of all hairs previously mentioned. They are large oval 

 cells joined together forming a hair, and those near the tip 

 are rounded, the whole structure resembling a beaded neck- 

 lace. 



Joliet, Illinois. 



