Bleshy or Presh i ruits: 3 are at oN 89-104 3395-4066 152 
Nuts, Day Seeds, ete sii teas IO4-I10 4067-4366 185 
@erealsyand Other Grains: 54 25,4.". IlI-114. 4367-4772 197 
ID SEVERN NOR OR AEE LD RDG C AMIE CAAT ge RA 209 
Wndersround Portions... 0011... 4, - II5-120 4773-5116 211 
Barks and Woodsei 23 eeu ado aa 139-144. 5117-5380 229 
IMS A MSS Meee iis chad e caie ae Tadic ava hatlen 163-168 5381-5629 242 
Herbs and) Plant-bodiesa.)2 i... 169-174 5630-5868 254 
inflorescences and) Flowers.) 2)..).!:)) 148 5869-5945 267 
AUN aes Si hae alee RAR b a i Rel 145, 149-150 5946-6067 271 
Sekar (Gi a ae Mae Ei A ee fee cee Pon At A 146-147 6068-6161 277 
Miscellaneous, Drugs tie wets 9 20h), 124-126 6162-6315 281 
Poisonous Plants in the Vicinity of New 
PNR cuiceas mia eye ele) te ciecchiadat al ecclesia lh ey ate I2I-122 6316-6427 288 
pe etVeIcdes siya crave lie Ati Malach Vial 123 6428-6448 295 
Woods and Wood Products.......... 192-208 6449-6992 296 
POAC O Astra 0/8 di Nemuenet al Viale nual nan Lau ee 209 6993-7069 316 
Miscellaneous Articles: )2-4/.)i4) 5.2) iu 210 
CATALOG, OF EXHIBITS 
Wiru DescripTivE NorTres anp OTHER INFORMATION 
Plant Hairs and Fibers 
In common parlance, some plant hairs, such as cotton, 
are often spoken of as “fibers,”’ but there is a valid distinc- 
tion between these two classes of tissues, both of which 
possess important uses in the arts. Fibers are internal 
structures pertaining to the framework of the plant, while 
hairs are of epidermal origin. 
Piant Hairs 
Plant hairs belong to the class of structures known as 
trichomes. ‘These are appendages developing from the 
epidermis of various parts of the plant, and include scales, 
papillae, spicules, epidermal glands, prickles, and all other 
appendages of the superficial layers of cells. They serve 
the plant through protection, nutrition, and seed distribu- 
tion. When long, slender, and flexible, they are known as 
