278 Glandular Hairs of Plants. [May, 
one or more nucleoli. Besides the short hair and the gland of 
Fic. 29 Fic. 28. 
Fic. 27.—Side view of — on Toiiato, Fic. 28.—Top view. Fic. 29.— 
Hair and protuberance on Tom 
the watermelon plant, shown in a 30 and 31, there are large 
numbers of other very long-jointed hairs. Figs. 32 e 33 show 
us two hairs of Phlox drummondii. Here the 
glands appear to be composed of four or more 
cells. Some of the glands of this 
plant consist of a single cell. Fig. 
34, &, 6 represent 
some of the small- 
est hairs on Mar- | 
tynia proboscidia. 
FIG. 30. Fic. 31. FIG. 32. Fic. 33. 7 
Short hair of plant Glandular hair of Hair of Phlox Hair of Phlox Drum- 
of watermelon. watermelon, Drummondii. mondii. 
Besides a few of these small hairs, the whole surface of the plant, 
including the sepals and petals, is thickly covered with glandular 
hairs as shown in Figs. 35, 36, 37. These glands, as do most 
glands of other plants to a greater or less extent, secrete a sticky: 
‘substance which is usually increased in quantity by irritation. — ) 
