Plants in Action is a free,  peer-reviewed on-line publication resource for plant science teaching  and research published by the Australian Society of Plant Scientists, New Zealand Society of Plant Biologists, and New Zealand Institute of Agricultural and Horticultural Science. 

It includes an excellent chapter on leaf formation at the shoot apical meristem. 

Shoot apical meristems are minute yet complex structures that are
ensheathed within new developing leaves or bracts. A vegetative meristem
gives rise to leaves or other organs, for example thorns, tendrils,
axillary buds and internodes (Figure 7.7a). Axillary buds are themselves
complete shoot meristems from which branches are produced (cf. lateral
roots described above). In angiosperms, when a plant shifts from
vegetative to reproductive growth some meristems undergo a transition to
the reproductive state and give rise either to multiple flowers in an
inflorescence, as in mango (Figure 7.7b), or to a single terminal
flower, for example a poppy or waterlily (Figure 7.7c). All axial growth
from meristems, be they vegetative or floral, is continuous or
indeterminate until topped by the formation of a flower. When this
occurs, floral organ primordia arise in whorls from the shoot meristem
and differentiate into the familiar sepals, petals, stamens and carpels.
Sometimes, however, the indeterminate inflorescence meristem reverts
back instead to a vegetative status. Think of a bottlebrush or a
pineapple with a leafy axis extending beyond the flower or fruit (Figure
7.8a). What determines whether a meristem is vegetative or floral? In
many species, environmental signals cause the switching between
vegetative and floral states (Section 8.3) and a picture is now emerging
of the genes and molecular mechanisms responsible for defining
structures that are generated by meristems (see below).

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