Assorted foliage and leaves 

There are several techniques for creating leaves, for this painting a long thin brush was mostly used for much of the leaves. On the cotton paper dots and dry, free lines are added to show different kinds of leaves. Cypress and Oak are usually shown with small round leaves while pines are shown with needles. The round leaves are added with a very dry, light and slender raccoon hair brush and most of the leaves are double lined.
Assorted leaves

On leaves

There are several different ways to do leaves, one method is to outline the leaf first then fill with wash or color after the outline is dry. The second method is a bit more critical when it comes to timing. First the leaf is shaped with the light ink generally using a side brush stroke. After this, you must wait a bit until the leaf is still somewhat wet, then the outline and the veins are added using a darker. Painting these while the leaf is still wet allows the dark ink to spread a little and fuzz the outlines a bit. This will require some practice to get right.

Azalea

Cotton paper is used for this painting. First with a large soft brush, the violet petals are stroked on to the paper. More water is added to the brush and further petals are added with a side stroke. It is very important when painting flowers that your brush is clean, colors are easily contaminated with black. While the petals are still wet, the veins and stamen details are added. Some darker spots and stems were added to tie the composition together, the colors are kept close in value to aid this. This type of picture works best with mostly flowers showing and very few leaves.
Azalea

Bamboo

This is the first stroke that Mr. Hau recommends for his students. Paint the stems first with a strong side brush stroke. Add the joints with a black ink, make sure you leave a bit of white as a highlight. Add some small stems coming of the joints, the artistic convention is to alternate the side from which the stem comes from. Add leafs using a vertical brush, don't push it!  Add some dots to taste.
Bamboo

Bamboo leaves can also be done in detailed outline style (gombei), when painting gombei, the leaves are first outlines and then filled with color or ink. Here are examples of  free style (xiye) and gombei style leaves for practice purposes.

Gombei bamboo leaves
Practice bamboo leaves

Bamboo and camellia 

Using a small flexible brush the bamboo stalks are painted, these were applied in an upwards direction as opposed to starting from the top and painting down. Note while ideally the stem should be painted in one stroke, Mr. Hau did retouch one segment he didn't like. Indigo is used for the bamboo leafs. For the camellia flower, a large flexible brush is used for the leaves, pushing and pulling with a side brush stroke while a medium sized stiff brush is used for details. The veins are drawn while the leaves are still damp but not wet.
The  flowers are initially painted in monochrome and then red is added as a highlight, golden yellow is also applied to some of the lower leaves as well as some stems.
Bamboo and camellia

Bamboo and Plum

This painting on cotton paper shows several styles of painting plum blossoms as well as some smaller bamboo. There are colored plum blossoms, ones made from thin ink and blossoms that are outlined. For the blossoms that are painted in color or thin ink, it is important not to use ink that is too wet or dry. If it's too wet it will run out and not look good. If it's too dry it will not have a flower texture. When applying color make sure you have washed your brush well and use clean water. The stamen can be black or in color. When painting the outlined blossoms a very dry brush with thin ink is used. Branches can be added before or after the blossoms are painted. In this painting the bamboo was added at the end.
Bamboo and plum

Bamboo with flowers 

Bamboo with flowers
Bamboo with fruit

Bird of Paradise

A brown is used for the petals and the leaves are brushed with wet ink.
Bird of paradise

Canna and Camellia

The flowers are first created by broad back and forth strokes. Then the leaves are brushed on with a single stroke. Highlights and dots are added as needed.
Canna and Camellia

Chrysanthemum

Chrysanthemums

Flowers

Outline the flowers first using a little dry brush, not too wet and fast. Add the dark leaves under the flowers. Add a very strong drybrushed stem, filling in some more branches. Finish up with some 'dots' and some more leaves. Now draw the leaf veins in dark ink. Fill in the flowers with a light wash, for monochrome paintings, this can be a light gray wash. Make sure to leave some unpainted white spaces for highlights. You can now add in some smaller light leaves.
Monochrome flower
Monochrome stem
For flowers in color, the technique is much the same, first paint a red flower, adding some violet to it before the ink dries to allow the two to blend together. A superior but slower way is to blend the colors ahead of time in a dish. When painting the leaves, do strong, wet leaves with only one coat of paint, multiple coats have a tendency to look 'dirty'. Now add the flower center and 'dots'.
Red flower
Flowers and pine
Chrysanthemum
Flower using very wet ink
Flower and calligraphy

Lotus #1

After one of Mr. Hau's landscapes was complete, there was a second sheet with indigo splotches on it. Mr. Hau rarely wastes paper so he set to work creating a lotus. First red flowers were added, somewhat wet with flying white for highlights. Some very free black leaves were added as well to turn the scrap paper into a lotus. Some very dry stems are added to the bottom of the painting and some rotted flowers are added near the top. More blue is added to the leaves, broken leaves are added to the bottom using a side brush stroke. Some earthy brown tone is added as background. After the flowers have had a bit of time to dry, some black stamen are added and the leaves are outline in black as well as having veins drawn. An inscription from a famous Tang poem is added to finish the work. This lotus will exercise your side brush technique to its fullest.
Lotus
Lotus flower detail

Lotus #2

This lotus is painted on rice paper. First very thin ink is used to outline the lotus blossoms with some thicker ink used for the outline of the center pistil. Then outlines of the center stamen are added as well as some further outlining of some of the lotus petals. The lotus leaves are brought forth with a broad wet side brush, the first layer is a thin indigo blue, further layers will be added while the leaves are damp. At this stage veins are added to the leaves while they are wet. This will cause them to spread quite a bit. Some thick and heavy stems are then added after the basic leaves are done.

After the outline of the lotus flower is dry, red ink is applied to the flower petals while the center is painted gold along with a touch of dark green. The lotus flower is then outline again with a deep, dark red. This same red is used to paint the veins as well.
Red lotus flower

At this time some pale green leaves are added along with more stems and the like. A bright green is now boldly brushed over the large indigo leaves previously laid down. After the leaves have dried a bit, the veins are redrawn in dark ink.
Lotus leaves
Red lotus complete

Lotus #3 

Red outline lotus

Orchid 

Don't make the base too tight together, make sure that if the leaves cross that they meet at a narrow angle.
Orchid

More orchid examples 

Orchid details #1
Orchid details #2

Persimmon 

The petals that are on top of the persimmon are first added with a small brush and gray, dry ink. Then with a a larger brush, the orange/red of the fruit is added using a side stroke in a circular fashion. Leaves are then added with a very broad side stroke some red is brushed over the leaves as well as some additional black. Veins in red and black are added as well. Some very light leaves are added around the individual persimmons, without these the contrast between the fruit and the dark leaves would be too great. Some of these are created by pressing as well as by side brush. Stems are added using very dry ink and green is added to the tops of the fruit as well using pressing strokes. Additional red is added to the persimmons to bring out the roundness of the fruit.
Persimmon
Another persimmon example 

Plum

The plum is one of the four classic strokes taught by most if not all brush painting schools.
Plum #1
Use a rough dry brush with thin ink for the flowers, they need a bit of flying white in them. Add the black stamen. Branches must be rough and free. Use a side brush for the large banana leaf.
Plum and banana leaf
Plum blossom details
More plum blossom examples

Pomegranate and loquat 

Pomegranate and loquat

Rose, orchid and bamboo

This painting is done on rice paper, initially the roses are outlined with a dry gray ink using mostly a sidebrush stroke. After that the leaves are added with a wet brush. Some of the leaves are painted using side brush while others are created by a pressing brush stroke. The veins are then drawn in with a tiny brush using a vertical brush stroke with dark ink. Thorns are also added with a very dark ink. At this point color is then added to the painting, this is done with a fair amount of ink so the effect is rather wet. Remember to leave some white when adding color to the petals to represent highlights. Petals are painted with either a side stroke or a pressing stroke. After that some golden yellow is added over the leaves followed by indigo and a medium green. Once again leave some white to represent highlights, without these your painting will appear rather flat. Add some dots to represent stem ends and other flower bits. Finally some very thick black ink is used to create pistils.
Rose, orchid and bamboo

Small fruit

The fruits are painted with a circular stroke, the stems are painted with a vertical stroke with very dry ink Leaves are painted with a very damp side stroke using a large brush. The veins are added while the leaves are very wet.
Small fruit
Another example of fruit and flowers
Garden vegetables 

Wisteria 

Wisteria