HAIRS. 185 
resin is probably the only example of such a drug originating 
from trichomes.’ 
In kamala and lupulin, which, according to the nature of 
their development, should also be classed with the trichomes,’ 
the formation of resin predominates; and in kamaia oil is en- 
tirely wanting. 
Glands which secrete wax are found on the leaves of Glodu- 
Fic, 95,— Flores Verbasci. A, Band-like, soft, club-shaped hairs of the threefshorter 
stamens, covered with exceedingly fine, spirally-arranged, projecting points. PB. Stel- 
late hairs from the base of the folds of the corolla, 
laria Alypum UL. and other species,’ those secreting nectar in 
Melampyrum.* 
™Compare Thiselton Dyer, Pharm. Jour., xv. (1884), 301. 
* With regard to the development of the lupulin glands, compare 
Holzner, ‘“‘ Entwickelung der Trichome der Hopfendolden.” Bayer. 
Bierbrauer, 1877, No. 19. Rauter, ‘‘ Denkschr. d. Wiener Akad.,” 1870, 
p. 31, Luerssen, ‘‘ Medizin.-Pharmaceutische Botanik,” ii., p. 527. — 
Harz, ‘‘Samenkunde,” ii., 896. 
* Heckel et Schlagdenhauffen, Comptes rendus, 95 (1882), 91. 
*Rathay, ‘‘ Ueber nectarabsondernde Trichome einiger?7Melampyrum- 
Arten.” Wiener Akademie, 1880, 
