276 Glandular Hairs of Plants. [May, 
side throughout most of their length, while in Fig, 18 there are 
but few rays, which separate at once from each other. Between 
these two extreme specimens are found any number of interme- 
diate forms. Much like the preceding are the star-shaped scales 
~My 
Fic. 20.—Star-shaped hairs on Deutzia scabra. 
on the leaves of Deutzia gracilis. There are many scales of a 
similar character found on most of our ferns. 
De Candolle, in his Vegetable Organography, says of the hairs 
of plants: “Some are very tender, others very rigid, and most 
are of all the intermediate degrees. With regard to their direc- 
tion, some are vertical to the surface from which they spring; 
some more or less incline forwards; others more or less bac x 
wards; some are perfectly straight, others hooked at the point; 
there are several which are contracted, or which are interwoven 
with one another. As to their form, they are found as cylinders and a 
very cylindrically-elongated cones. They are sometimes seen P 
the orm of reverse cones, among. those that are EE 
they are found forked, with two, three or a greater number 0 
branches; or starred at their apex, or divided at their base me 3 
branches which seem as so many distinct hairs reunited into 
bundles, having a common base.” 
eee: 
aes 
