xxxii 
BOTANICAL TERMS AND DEFINITIONS. 
as in the rose, pink, &c. but that the petals are of unequal 
size and shape, as in the violet, &c. 
Jagged, wirfe EROsE. 
Jagged-pointed, (Preemorsum) applied to leaves extremely blunt, 
and with many irregular notches. 
Jointed, vide Articulated. 
Keel, (Carina) the term keel is applied to two of the petals in 
papilionaceous flowers; the keel is composed of two petals, 
separate or united, and encloses the internal organs of fruc- 
tification. 
Keeled, {Carinatum) applied to leaves when the back is very 
prominent longitudinally. 
Kidney-shaped, (Rewi/brwe) 'applied to leaves of a broad roundish 
form, hollowed out at the base : example, the Asarum 
Europaeum. 
Knotty, {Nodosa) roots are so called, when forming knots, united 
by a filament or thread. 
Knobbed, vide Tuberous. 
Labiate, or Lipped, {Labiatus) calyxes are so called when the 
segments or divisions resemble the form of lips. 
Laciniated, (Laciniatum) applied to leaves cut into numerous 
irregular portions. 
LiEVis, vide Smooth. 
Lanatus, vide Woolly. 
Lanceolate, (Lanceolatum) applied to leaves of a narrow oblong 
form, gradually tapering towards each end. 
hATERA.Tu, {Lateralis) applied to peduncles when situated on the 
side of the stem or branch ; and to stipules when placed 
on each side of the petiole. 
Lax, {Debilis) applied to stems which are not stiff, but pliable and 
easily bent. 
Leathery, {Coriaceum) leaves are so called which are thick, 
tough, and somewhat of a rigid consistence. 
Leap. {Folium) Leaves are organs destined to perform various 
functions; as imbibing and exhaling air, light, moisture, and 
carbonic acid gas, which they decompose ; the carbon is 
added to the sap, (and affords nourishment to the plant), 
and they exhale the oxygen : leaves in the dark give out 
carbon and absorb oxygen.* 
* To enter into the functions of vegetables would be foreign to our work, we must 
tUerefore refer our readers for information on this interesting subject, to those works 
that treat particularly on Physiological Botany, Ed. 
