Showing posts with label study page. Show all posts
Showing posts with label study page. Show all posts

Friday, 10 April 2015

Day 5, Cymbidium Orchid Flower

Finally a change of subject! and a change of brand for the materials. For day five I decided to do a quick sketchbook study of a Cymbidium orchid,  a single flower from a plant which is now nearing the end of flowering period, seemed a shame to miss painting at least a little part of it. This time working in Stillman & Birn Zeta series sketchbook and with a limited range of Schminke Horadam artist watercolours.

Cymbidium flower study, size 7 x 7 inches on the best of all sketchbook paper, Stillman & Birn.
I only ever painted an orchid once before, I think it was a Paphio, not so much into panting them but they are fascinating! They really are the glamorous 'cheats' in the world of pollination! Tricking unsuspecting insects and other animals into thinking they offer some attractive reward but actually over 1/3 of all orchids have nothing at all to give to insects, unlike most other flowers they don't do mutualism and waste none of their energy on giving nectar or pollen away to insects..... Clever eh!

I was never more interested in any subject in my life than this of Orchids 
Charles Darwin 1861
Detail showing the column with pollinium
These Cymbidiums and some other orchids have their pollen in a pollinia, these are sacs of pollen  housed at the tip of the column and covered by an anther cap. If you have an orchid such as a Phalenopsis or Cymbidium try touching the anther cap with a cotton bud or cocktail stick, the pollinia will easily be revealed and pulled away intact. But a word of warning, unfortunately the flowers job primary job is done once the pollinia is removed and it fades and dies very quickly once the pollinium is removed. When the curious insect enters the flower the whole pollinarium comes away sticks to the insect ( it's attachment is very sticky!).  It' is then carried to the next flower and facilitates cross pollination, as the curious animal persists in it's search for a reward! I tried to photograph the pollinarium ( below) but didn't make a great job, sorry. But hopefully you  get the idea.
    
 Pollinarium, showing the pollen sacs and sticky attachment which allows it to be carried by insects to the next flower. actual size is only around 2mm at the widest point.
Interesting as this story of pollination is - this post isn't really about orchid reproduction but I forgot to take photos of the painting process, so thought I'd add a bit of extra stuff!

Here's a brief summary of the painting process.

Centre page is a face-on view of the flower. The fairly straight forward symmetrical view is easily achieved by drawing a box using the height and width measurements of the flower, then by dividing it up into four quarters (draw a horizontal and vertical line through the centre). Finally plot the position of the petals by judging the angles of the petal positions....kind of like a clock face. All that's left is to add the outline by  measuring of the parts for accuracy.

Simple face-on view of flower, get the basic symmetry right and then make adjustments as necessary
  Thereafter the shade colour was added, which is my usual approach when painting light flowers. I'm not at all familiar with Schminke watercolours but have some pans so thought I'd give them a go. I used manganese violet and ultramarine finest for the shadow colour. For the 'yellow' areas on the petals I used titanium gold ochre. I wanted to reach for the W & N on a few occasions because I could think of easier options but stuck with it. They're fine to use although I've yet to learn about the particular properties and only have a limited colour range.

Adding the spots to a dampened surface gives soft edges.

I then added the basic hue for the petals,  which is almost 'fleshy' pink in colour.Vanadium yellow and vermilion plus a little of the ultramarine finest. For the cooler pinks I used ruby red in the mix.  The edges of the petals were faded and brown, brown madder an ultramarine was used here. For the dark spots on the labellum I used ruby red and brown madder with a tiny amount of ultramarine for the darker areas. To apply, I wet the area first and allowed it to part dry and dropped the colour on, this give the soft edge to the spots, but care has to be taken to have just the right amount of dampness or the spots will spread too much. Darker areas were added on top, the spots are actually slightly raised so the light catches the edge of them and a darker area can be added to the shaded side.
 A simple dissection in graphite and a few other parts were added (stigma, ovary, labellum and profile view).  Hopefully this gives a good overview of the morphology on this small study page.

Simple dissection
Orchids are really simple to dissect, because they are so fleshy and resistant to wilting, so if you've never dissected a flower before this is a good place to start but don't be surprised when it looks nothing like the standard 'plant parts' illustration often used in botanical painting classes!  

   

Wednesday, 19 February 2014

Pineapples Galore!

Last week saw the start of another pineapple painting for me.  I always recommend painting a subject more than once if you really want to get to grips with it.....this is my 5th pineapple! In fact many botanical artists seem to attempt a pineapple at some point! A quick Google search reveals a huge selection ....it's one of those 'must try' subjects.

pineapple study page
Pineapple study page, February 2014

You can find any number of great examples of contemporary pineapple paintings, Coral Guest and Fiona Strickland to name a couple of the best.  Historical botanical illustrations documenting pineapples are also plentiful, Georg Dionysius Ehret, Maria Sibylla Merian and Marianne North all illustrated this exotic fruit. But why is the pineapple so appealing?

Pineapple and cockroaches 1701- c.1705 by Maria Sibylla Merian (Public domain Wikimedia Commons)

 Firstly, it's a pretty good subject. Technically quite challenging with its 'Fibonacci' spirals ( more about that later) so requires some discipline in the drawing and also has great texture and colour too. Perhaps for todays botanical artist the work of master illustrators add that extra appeal.....to paint what they painted? Except today this one time rare and much sought after fruit is readily available for us to buy and try with very little effort. The pineapple has an incredibly rich history and that bit of scientific curiosity too, so I guess all-in-all it's very appealing .....

Here's some pineapple trivia followed by a quick tutorial for anyone that fancies a go.


The Pineapple:
The pineapple, Ananas comosus is a member of the Bromeliaceae family. Thought to originate from the Orinoco basin in South America. Prior to introduction in Europe they were distributed throughout the tropics and this caused some confusion about their origin.  The pineapple is desiccation-tolerant with adaptations, including CAM photosynthesis (stomata opening at night), all of which allows the plant to cope with drought..... this probably explains why the pineapple is so successful!

 During development the fruit produces up to 200 flowers. Once it flowers, the individual fruits of form what is known collectively as the pineapple. Whereby the ovaries develop into berries which form the large, compact, multiple accessory fruit. 

Pineapple flowers (img. Wikimedia Commons  2.5 Generic Licence)
In cultivation pineapples are propagated by vegetative reproduction - in fact you can cut the crown off a pineapple and grow a new one! Pollination is by hummingbirds, beetles and bats but this is not a favourable method of reproduction in crops because the seed production reduces the quality of the fruit. ....in fact the importation of hummingbirds is, I believe, banned in Hawaii because of the impact on crops.
History: When Christopher Columbus  arrived at the island of Guadeloupe in 1493, the ships crew stumbled across piles of fruits, including pineapples as well as pots of human body parts! The European sailors first recorded the fruit which had an rough, segmented exterior rather like a pine cone and a pulp like an apple.

John Parkinson (1567–1650), Royal Botanist to Charles I, later described the pineapple as: 

Scaly like an Artichoke at the first view, but more like to a cone of the Pine tree, which we call a pineapple for the forme... being so sweete in smell... tasting... as if Wine, Rosewater and Sugar were mixed together. (Theatrum Botanicum)
The exact date of their introduction to Europe remains unknown but their is evidence that pineapples were being cultivated in the Netherlands by the mid to late 1600's. Once the fruit had arrived it quickly became a symbol of hospitality, power and wealth, the pineapple really was the celebrity of the fruit world; expensive, much sought after and often displayed in works of art and in dining room centrepieces topping towers of exotic fruit.
Still Life with Watermelons, Pineapple and Other fruit by Dutch artist Albert Eckhout (1610-1665) Eckhout's still-life paintings show Brazil's abundant crops in the 1600's ( Public domain  Wikimedia Creative Commons)
 The pineapple symbolism made it the subject of many works of art. The scene of  Charles II's head gardener, John Rose,  presenting the King with the first fruit grown in England was famously documented in this painting by Hendrik Danckerts, 1675.


Charles II being presented with the first pineapple by his gardener John Rose (Public domain Wikimedia Creative Commons)
The same symbolism was also used extensively in architecture. You can find pineapples used in all sorts of architectural features, on follies, gateposts and buildings. This extreme example at Dunmore House in Scotland, was added to the building sometime during the 1760's, they had a hot house of course and grew...... pineapples!  


The Fibonacci myth: The fruit of a pineapple is arranged in spirals ( see image below), this arrangement commonly found in nature, in pine cones, sunflower seed-heads and lots of other plants, it's commonly said to be a Fibonacci sequence. While some fruit do actually have the 5,8 and 13, or 8,13 and 21 arrangement of fruit in each spiral, all of  which are Fibonacci numbers, many do not.



Pineapple spirals, don't necessarily exhibit Fibonacci numbers
The Fibonacci sequence was first described by  mathematician Leonardo Pisano Bigollo (c. 1170 – c. 1250) as a mathematical sequence related to growth being 1,1,2,3,5,8,13,21 and so on - where each number is the sum of the two previous numbers. If you count the fruit on each spiral of some pineapples, they do indeed add up to these numbers. But this arrangement is not always the case and Fibonacci is no a magic formula or design in nature it just happens to be the most energy efficient growth pattern..... so Fibonacci's sequence is simply a model for growth and therefore a generalisation ( and a very useful one!). I've highlighted the spirals in red, white and blue on the fruit below, and as suspected they don't add up to a Fibonacci numbers. If you have nothing better to do why not go and count the spirals on pineapples in the greengrocers you will find that having checked a few - it's more often than not often not the case, but the general growth pattern looks much the same. So if you have tried and failed to understand the Fibonacci spiral in a pineapples and can't seem to get the numbers that you think it should add up to......it's not because you've missed something! it's because there is a lot of variation in nature during growth and only the most perfect pineapples exhibit Fibonacci numbers. Having said that pine cones and sunflowers are more likely to exhibit perfect sequences....yes I checked these too!  

What also appears to be true in some cases though is a Fibonacci type theorem whereby a pineapple being a cylinder made up of these hexagonal fruit has spirals in which the largest number of hexagons equals the sum of the sum of the two smaller numbers. A + B = C..... So it still makes the patten. But enough of all that. 


Finally The Painting. I've written this mini guide to a study for those of you that might want to try the pineapple. It's actually not so difficult as might be assumed. The spiral sequence is a simple one.
The most common errors are
1.getting the angle of the spirals wrong
2. Making it looks too flat.

First I map out the spirals by taking some basic measurements and looking at the angles. The spiral with the most fruits is less steep than the other.

The chosen one, a short and fairly round pinepple, I took some measurements, height, width, note there is no Fibonacci sequence etc.  
I make a rough drawing on tracing paper of the two main interlocking spirals - but taking to care to observe the perspective. The same type of pattern is seen in the leaves of the crown.
Drawing: Once I have the basic shape I add transfer the shape to a study page and add some detail to the drawing in the fruits and leaves.I use the same paper for the study page as I do on the final painting because otherwise the colours will be different.

Position and Lighting: The best position for the fruit is eye level. The fruit is placed it on top of a glass, my set up is a low-tech balancing act using a few empties! I position the lamp at the upper front right with a daylight bulb, to avoid working in my own light. I also use a tin can to reflect a bit of light back onto the fruit. Tin cans are great for all sorts!
The set up

Take photos for reference kept at hand on the laptop- remember pineapples ripen very quickly


Colour: To be honest I don't spend a huge amount of time doing colour samples unless I'm really struggling with a particular colour. I work out the basics an play with them on the rough study.

A few little 'rules' to keep it simple: 
Work out colour by finding each basic hue first, these are found in the mid tones where saturation is highest.
So I always start brighter than is needed and take it down in saturation, for the shades using a complimentary colour or with my own neutral tint mix.
I warm up or cool down the colours depending on the light.
Try to work with as few colours as possible.
Avoid opaques other than in the initial wash, thereafter use only transparent colours to preserve the luminosity.
Avoid colours with black, e.g. indigo, sepia  unless it's for dry brush detail. They make colours 'dead' if used in layered washes.
Early stages, finding the colours.


Continuing to work out the colour, the shades, techniques and glazes.

 Yellows
Gut instinct tells me that the basic yellow hue found in the fruits is: New Gamboge 
Warm it up with scarlet lake
Cool it down with  ultraviolet

add Neutral Tint to the mix the shade colours

Greens in the fruit
Cobalt Dp + Transparent yellow
Warm with New Gamboge
Cool with Ultraviolet 

The Browns -'bracts' on each fruit,
Raw umber
warm add v small amount of Scarlet Lake
cool it with Cerulean

Add Some Cerulean on the highlights

The Crown
 A very light wash of Cerulean and Ultraviolet to give the 'grey' effect applied as a wash first
Transparent yellow + Cerulean for the lighter brighter greens at the base of the crown
Cobalt Blue deep  and Transparent Yellow for the older leaves used selectively on areas of leaves most green e.g. leaf edges.

The Process
I work out the washes and watercolour techniques in order on the study page and make any notes
Keep an eye on the light at all times - remind yourself it's a spherical type object. Alternatively I could have painted a wash all over leaving out the main highlight but this doesn't work so well with a pineapple because of the many small areas where the light hits the fruits. So I paint each bract/ fruit individually to start with and add glazes later.



Bear in mind that the fruit ripens and changes colour rapidly - thank goodness for the photo reference!
Now I'm ready to start the painting.....  

But in true Blue Peter style, here's one I made earlier.....


Pineapple watercolour from 2010

A Word of warning for potential pineapple painters.  Alas there's a dark side to the modern pineapple! This once rare sybol of wealth can be purchased at the local supermarket for less than £1! I've never seen pineapples for that price before and competition between growers usually means there's much high price to be paid somewhere or other in order to secure supermarket contracts! Most supplies comes from Costa Rica, where growers may use pesticides which can affect soil quality and reduce biodiversity. Pesticides include organophosphates and known hormone disruptors which can affect workers' health and contaminate water supplies. The chemical are of course found in the fruit too!.... oh and the workers are not paid a fair wage.
To find out more read this article 'Bitter Fruit: The truth about supermarket pineapples' 

So if you're going to paint a pineapple please be careful about its origin and look for the Fair Trade symbol and organic fruit.