Roof Membrane (ocrea or ochrea)
this tool is in the form of a thin membrane that surrounds the base of a stem segment. so there is above a leaf stalk. The roof membrane is considered as a supporting leaf whose two sides are sticking together and encircling the stem, there are among others in polygonum sp.
Tongues (ligula)
a small membrane that is usually found at the boundary between upih and leaf blades on the grass (graminae). This tool is useful to prevent the flow of rainwater into the armpit between the stem and leaf leaves, so that the possibility of decay can be avoided.
Leaf top or leaf midrib
As explained above, not all plants have leafy leaves. Leafy leaves are generally only found in plants classified as monocotyledoneae only. grass tribe (gramineae), tribe empon-empon (zingiberaceae), banana (musa sapientum L.) palma group (palmea), etc.
Leaf upih aside from being part of a leaf attached to or embracing the stem, it can also have other functions:
As a protective bud that is still young, as can be seen in sugar cane plants (saccharum officinarum L.)
Giving strength to the stem of the plant. In this case the leaves are all wrapped around the stem, so that the stem is not visible, even what appears as the stem from the outside is the upih earlier. This of course is possible if the leaf upih is very large as for example banana (musa paradisiacal L.) The trunk that appears on a banana tree is actually not the trunk of a real plant from it is called pseudo stem.
Petioles
The petiole is the part of the leaf that supports the strands and is tasked to place the leaf strands in such a position that they can get as much sunlight as possible. The shape and size of the petiole varies greatly according to the type of plant, the size and shape can be different. Generally the cylindrical petiole with the top of it is slightly flattened and thickened at the base. If we look at the cross section we can find the following possibilities:
Round and hollow, for example papaya leaf stalks (carica papaya L.)
Flat and wide edges (winged), for example oranges (citrus sp.)
In terms of
Half circle and often the upper side is shallow or deep grooved as in a banana leaf stalk.
Although the leaf stalks as mentioned above are usually thickened at the base, there are also leaf stems thickened at the base there are also leaf stems thickened at the base and ends, for example on the leaves of a butterfly tree (bauhinia purpurea L.)
Furthermore, when viewed from the surface, leaf stems can show wrinkles, scales, hairs, lenticels, etc. In the description of the composition of the leaf he has also stated, that the leaf stalk can undergo a change of form (metamorphosis) into various leaf strands called phylodia.
Leaf blade
So many plants and varieties that have leaves whose strands vary too, both regarding the shape, size, and color. The properties of the leaf blade that need attention are:
Wake up leaves (circumscription)
The widest part is more or less in the middle of a leaf blade.
Possible wake leaves are:
Orbicularis (Round)
Peltatus (Shield)
Ovalis or elliptic (jorong)
Oblongus (elongated round)
Lanceolatus (lanceolate)
The widest part is more or less below the center of the leaf blade:
a) The base of the leaves is not etched.
Ovatus (ovate)
Triangularis (square terms)
Deltoideus (deltas)
Rhomboideus (rhombus)
b) Leaf base with incised or notched leaves.
Cordataus (heart)
Reniformis (kidney)
Sagittatus (arrow)
Hastatus (spear)
Auricular (eared)
Parts that are more or less above the middle of the leaf blade.
From this group the possible shape of the leaves:
bovatus (best ovate)
Obcordatus (wake up heart reversed)
Cuneatus (inverted triangle)
Sathulatus (wake spatula or spatula)
There is no widest part. Can be said from end to
until the base width is the same, from this part the possible shape of the daunya:
line (line build)
ligulatus (building tape)
ensiformis (sword building)
subulatus (wake nails or dabus)
Acerosus (wake of the needle)
Leaf tips (apex)
Acutus (pointed)
Obtutus (blunt)
Truncatus (romping)
Mucronatus (prickly)
Acuminatus (tapered)
Rotundus (rounded)
Retusus (split)
Leaf base (base)
The edges of the leaves never meet because they are separated by the base of the mother's bone or the tips of the petioles, at the base like this the shape is the same as the tips of the leaves.