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TERMINOLOGY. 65 
4, Geniculated, (geniculata), that has a joint in the 
middle by which it is bent, asin the common oat, 
Avena sativa. | 
5. Bent, (recurvata); when bent in the form of a 
bow. 
6. Twisted, (oriilis), when it is spirally twisted, 
or forms,a serpentine line. 
7. Terminal, (terminalis), when situated on the 
point of the glume. § 65. 
8. Dorsal, (dorsalis), when mserted behind the 
apex or on the back of the glume. 
§ 50. 
The HAIR, (pilus), is a fine slender body, some- 
times long, sometimes short; hairs are organs of 
transpiration, and serve for the covering of plants. 
The various divisions of hairs we have already men- 
tioned in § 6. ‘The kinds are, 
4, Simple, (simplices), that are not divided, but 
are of an equal filiform appearance. 
2. Awl-shaped, (subulati), short, strong hairs, 
_ that are thickest at the root, as those on the borage, 
Borago officinalis. 
3. Needle-shaped, (aciculares), very sharp pointed 
like the last, but at their base there is an enlarge- 
ment. . 
4. Bulbous, (bu/bosi), that have a round bulb-like 
appendage at the base, as in Centaurea Jacea. 
8, Hook-shaped, (wncinati), that are bent like a 
hook, as in Scabiosa succisa, and various orasses. 
6. Knobbed, (nodosi), that hate regular knobs 
with interstices between them, 
4. Arti- 
