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1.17<br />
1.19<br />
,--------------::c-=--------,<br />
1.17 Simple IC3\'cS of the dicorylcdons KalanchOf'- dwgromontianurn<br />
and Begonia metallica. Both arc differentiated into lamina<br />
(1 J and petiole (2). Kalanchoe (A) shows a single midrib in the<br />
lamina but in Begoflltl (B) sevual main veins an arranged<br />
palmately. NOte rhe adrenritious buds (3) which de\'dop hom the<br />
notched margins of the Kaumchoe blade; when these fall onto the<br />
M>il rhey fOO[ and develop iOlo new plants.<br />
1 Lamina<br />
1 Petiole<br />
3 Adventitious buds<br />
,---------------:<br />
1.19 Compound leaf of rhe dicotyledon Rosa (rose). Note the<br />
three lcailels, each with a pinnate (feather-like) arrangement of rhe<br />
veins, borne on a petiole with a pair of green slipuics (I) situated at<br />
ils base.<br />
I Sripules<br />
,------:::------------, t.lS<br />
1.18 Median LS through rhe ShOOf tip of the<br />
dicotyledon Glechoma hederacea (ground ivy).<br />
Note the hemispherical shoor apcx (I) and leaf<br />
primordium (2) arising at its base. The core of the<br />
apex is somewhat vacuolated and will give rise to<br />
the pith (3) of thc young stcm. An axillary bud<br />
primordium (4) is developing at the adaxial base<br />
(5) of the leaf. The abaxial face (6) of the leaf<br />
shows considerable vacuolarion and this is<br />
confluenr with the cortex of the young srem.<br />
Procambiurn (7). (LM x 325.)<br />
I Shoot apex<br />
2 leaf primordium<br />
3 Pith<br />
4 Axillary bud primordium<br />
5 Adaxial leaf face<br />
6 Abaxial leaf face<br />
7 Procambium<br />
17
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