58. During the early stages of embryogenesis, cell division takes place throughout the young sporophyte. As the embryo develops, however, the addition of new cells gradually becomes restricted to opposite ends of the axis, the apical meristems of future root and shoot
Identification and classification
Those who use plants for medicine, food, furniture and building material must be able to identify their source of materials
If there is insufficient evidence to place a particular species or genus to a family
Proper authentication of crude drug material
Importers anaatomical features more important
contains digitoxin and digitalin
Sambong (Blumea balsamifera L.) diuretic that helps in the excretion of urinary stones.
The mature embryo has a limited number of parts—
frequently only a stem-like axis bearing one or more
leaf-like appendages, the cotyledons (Fig. 1.8). Because
of its location below the cotyledon(s), the stem-like axis
is called hypocotyl. At its lower end (the root pole),
the hypocotyl bears the incipient root, at its upper end
(the shoot pole) the incipient shoot. The root may be
represented by its meristem (apical meristem of the
root) or by a primordial root, the radicle. Similarly the
apical meristem of the shoot located at the shoot pole
may or may not have initiated the development of a
shoot. If a primordial shoot is present, it is called
plumule