









Herbie was a drystone waller and he mainly built the regional styles from Gloucestershire – the ones in the photos above go from Cornwall to Cumbria and they’re often dependent on whatever local stone lay at the waller’s feet. The southern part of Gloucestershire provides several different kinds of stone; Brandon Hill Stone; Oolitic Limestone (a Bath and Cotswold speciality); Cornbrash, even some sandstone. The geology of the districts is written in drystone walls. I’d often see Herbie at work around the area, occasionally on churchyard walls – but for some reason he disliked going into churches and would never work inside them. As an amateur botanist I relish his work because drystone walls are a paradise for all manner of interesting plants, not to mention the invertebrates and vertebrates, the lichens the bacteria and fungi.
Someone told me a story about Herbie one day that not only made me laugh out loud, but also taught me an invaluable lesson. I’ll call it Herbie’s ratio and it applies in all manner of fields, not least hoping that a new, more expensive camera will always take better pictures. It seems that someone once pulled up in their expensive car and, after watching him work for a little while, asked how much he charged. “£100 a yard” he said. There was a pause and the man said “That’s a lot of money for a pile of stones”. Herbie also paused and then said – “well it’s £1 for the stone and £99 for knowing what to do with it”.

I use photographs – more than for any other purpose – for making notes. Mostly it’s my phone camera which is by no means state of the art because it’s a Google Pixel 6A which is rapidly approaching retirement (or obsolescence). But whenever we go for a walk I’ll take dozens of plant photos as a reminder of what we’ve seen. I recently found out I’d taken 22,000 photos over the past 10 years. For plants I know well, there’s no problem. But I’ve learned over that time that if you don’t identify, label them and get them on to a spreadsheet straight away, in a month you’ll have the photo of a plant that you can’t use to make an identification because it doesn’t have some key feature in focus or even visible at all.
The upside of phone pics is that there are some very good apps around which will suggest an identification with a percentage of certainty; but they’re by no means always right (the software designers claim upwards of 90%) and they can exude a false sense of certainty. The old manual way to ID plants is to narrow down the possibilities one question at a time with a list called a key. The difficulty for a beginner is that keys often use off-putting technical language – they have to of course; so there’s a steep learning curve. The great advantage of keys is that you can retrace your steps one at a time until you get back on to the right track. The great disadvantage of the AI apps is that you have no idea what steps they took to reach their conclusion; no idea which features of your photo were decisive and so you don’t accumulate the knowledge of what’s essential and what’s not. I should also mention that the more sophisticated phone cameras get, the more jiggery pokery goes on behind the scenes and I often land up fighting the phone over what it’s important to focus on or lamenting the brightening or colouration changes that it imposes.
The ideal compromise,then, is to use both apps and keys to hunt your plant down. I’d add one additional step which I find invaluable. The Botanical Society of Britain and Ireland (BSBI finds it on Google) have a public access database called the Plant Atlas 2020 which gives a huge amount of information including photos, flowering times and distribution (ie where they grow). So phone camera + app (Flora Incognita is one of the best, and free) + field guide ( Collins Wildflower Guide; Francis Rose’ Wildflower Key are both reliable illustrated guides but there are many others) + Atlas 2020 on the internet will get you closer and faster than flicking through 10,000 illustrations.

There’s another advantage of the phone, and that’s the fact that you can look alongside the image and find the EXIF data which records where and when the photo was taken. However the “where” bit – usually a latitude and longitude reference – needs to be treated with caution because it can be wildly out so I always make a note on the photos app of where it was taken in real life – “Stockhill Plantation Priddy, on Monarch’s way” – so a whole heap of contributory local information is immediately available.
You’ll have noticed, of course, that I’ve barely mentioned cameras so far. That’s because of Herbie’s Ratio. As I look around my study I can see four or five cameras and half a dozen lenses in their cases. The most expensive lens cost £1000 in New York (thank goodness I’m not a birder!) and it’s a Leica macro lens that fits my Panasonic Lumix camera. However, the closer you get to the subject the longer the exposure gets and in many cases the plant or my hands are waving around a bit so blurred photos are a regular curse. Carting all that equipment – including a hideously expensive carbon fibre tripod and lightweight magnesium ball head + flash gun etc – slows things down to divorce point since Madame is always with me. Of course you can uproot the plant and take it home to photograph in the warm, but in many cases that would be illegal and in my view it’s almost always unethical. So how often do I take the full big camera kit out on a plant hunt? – almost never, because the phone is light, always in my pocket, and is a perfect notebook, although there’s the question of locations in the EXIF data and I carry the cheapest ETREX GPS in my pocket in case something exceptionally rare turns up. It’s one of my least used bits of kit.
But, as always, there’s an alternative. I’ve also got a little Olympus TG-7 that totally fits the bill as lightweight, portable, waterproof and shockproof and with some eye watering capabilities such as built in focus stacking, macro settings and decent zoom. There are ring flash accessories and blah blah extras including wireless connection to my phone so I can mount the camera on a small tripod and control it using my phone as a remote viewer and trigger. It even downloads pictures to my phone so I can wander off into the AI apps wherever I am as long as there’s some kind of phone signal.
So marvellous! but does it help to identify plants? No it doesn’t; because as Herbie the stone-waller knew perfectly well, however expensive the camera, it’s knowing what to do with it that really counts. One important fact to bear in mind is that plants display considerable plasticity of shape and colour, depending on where and how they came to be where we find them. They change as they grow, flower and die back so the best photographs, illustrations and keys will always accept that there’s limit to what any description can achieve and sometimes that mysterious intangible quality called jizz will be the only show in town. We take the photographs and then we have to prove that what we say it is, is what it really is and the devil – as always – is in the detail.
So when I’m photographing an unknown plant I have to try to imagine what the questions in a key might be asking. because even if the AI app is 100% certain I still need to stand it up, as it were, in court. And so leaf shape, veins absent or present, if hairy is it hairy on one side or both? are the leaves opposite or arranged up the stem singly? What shape is the stem? how tall is the plant? if there are flowers can you see how many petals there are? what colour are they and are there lines and patterns? Are they daisy like or hooded like a foxglove?Are they all along one side of the stalk? What shape and colour are the anthers (the pollen parts)? What’s the overall shape of the plant – is it scrambling along the ground or climbing up another plant? Is it growing in deep, fertile loam or in a crack in a wall? There are more questions but I’ll stop there because I don’t want to put anyone off.
The thing is, a thoughtful photo taking these questions into account is going to be a lot more useful next week than a hasty out of focus snapshot, whatever camera it’s taken on. More often than not the phone camera is fine, but sometimes the features you need to look at are tiny – these flowerheads from a Fleabane are only 3mm wide, but the anthers and the hairs are diagnostic. This photo was taken at home (there were thousands of them so taking one of them was not going to make them extinct). This photo has to be considered with several others taken on the river near where we live.


Some time ago I joined a botanical illustration class for a couple of years and apart from learning a great deal about watercolour painting I learned to look intensely at my subjects. That has been the most tremendous help as I struggled to understand plants. The practice of painting the same thing over and over gives insight into colour, texture and form, and rendering that into a different medium is invaluable for taking photographs.
Technique v creativity – a phony war?
At art school in the 1970’s there was a rather stupid fashion for fostering what was called creativity as opposed to technique, and I ran into trouble for insisting that creativity was strangled at birth without it. My obsessive experiments with glazes, firing technique and chemistry got me marked down when it came to the crunch, but as far as I was concerned, technique in any discipline, sets you creatively free. There is no battle between the two, not in ceramics or botanical illustration nor in photography. The more technique you’ve got, the more freedom you’ve got, regardless of how much your kit costs. Herbie was right all along. A trowel is a trowel and a stone is a stone but the bringing of the two together in a wall is a work of art rooted in technique.
An example of a photographic set with notes










Green Bristle Grass, Setaria Viridis, Found on pavement in New King Street Bath. Occasional, prob birdseed. Height 37 cm, panicle 5cm. Very loosely rooted in crack – came out entire when I tried to break off a seed head. Checked in Stace, Cope & Gray, Sell & Murrell + Ddb. Around in UK since mid 1666. It’s a theraphyte – completes its entire lifecycle in one season and survives through seeds. Perfect desert/pavement dweller. Listed p 579 in Stace & Crawley “Alien Plants”. Olympus TG-7
- and an early attempt at rendering a grass in watercolour:















































