274 Glandular Hairs of Plants. [ May, 
The edges of ne petioles of Stezronema (Lysimachia) ciliata, a kind 
ofloosestrife, are fringed 
simple, while others are 
much larger and irreg- 
ularly branched, like a 
stag’s horn. Each hair 
whether simple or 
IG. 14. branching seems to 
Hairs on petioles of Stetronema ciliata. consist of one cell, made 
of several pieces fitted together. The surface of Leersia oryzoides 
Fic, 15.—Hairs on Leersta oryzoides. 
and L. virginica, rice-cut grass, is well supplied with short stout 
one-celled spines, all of which point downwards. 
x Several species of 
Galium, bed straw, are 
also supplied with 
: ; hooks of a similar char- 
FIG. 16. Bain on Galium. acter. In these the base 
of each hook is quite broad and the point quite short. 
The 
under sur- 
face of the leaves 
plant, are thickly 
covered with a 
woolly substance 
which consists of 
immense numbers 
of one-celled 
stalks, each hav- 
ing at the tip six 
Fic. 17.—Hair on Aralia papyrifera. celled arms OF 
rays which spread in every direction like the spokes of a wheel. 
papas at Dhaene Wein Mbt te 
Fg Se RS eat eT 
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