49 PRINCIPLES OF BOTANY, ETC. 
PE. In respect of Insertion. 
138. Petiolated, (petiolatum), when a leaf is fur- 
nished with a foot-stalk. : 
139. Palaceous, (palaceum), when the foot-stalk 
is attached to the margin. 
140. Peltated, (peltatum), when the foot-stalk 1s 
imserted into the middle of the leaf, fig. 1. | 
141. Sessile, (sessi/e), when the leaf is attached 
to the stem without any foot-stalk, fig. 29. 
142. Decurrent, (decurrens), when the foliaceous 
substance of a sessile leaf runs down along the 
stem. 
143. Clasping the stem, (amplexicaule), when a 
sessile leaf. is heart-shaped at the base, and with. 
both lobes embraces the stem. 
144. Connate, (connatum), when opposite, and 
sessile leaves are joined at their base. 
N. A perfoliated leaf, (folium perfoliatum), is al- 
ready described in § 13, No. 46.. 
G. In respect of Positign. 
145. Appressed, (adpressum), when the leaf turns 
up and lays its upper surface to the stem. 
146, Erect, (erectum s. semiverticale), when the 
leaf is directed upwards, and makes, with the stem, 
a very acute angle. 
i47. Vertical, (verticale), which stands quite up- 
right, and thus makes with the horizon a right 
angle. 
148, Bent sideways, (adversum), when the mar- 
ein of ‘a vertical leaf is turned towards the stem. 
149, Spread. 

