@hgpennington

The painting depicts the structure of a Penicillium conidiophore, resembling a simplified blue tree with rows of circular spores at the tips of its branches. It includes the stipe (trunk), rami (branches), metulae (sub-branches), phialides, and conidia (spores).

In 2025 I illustrated Penicillium stained with trypan blue. Penicillium fungi are important post-harvest pathogens, for example citrus green mould is caused by Penicillium digitatum.

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I drew a guinea pig by hand and captured my biro strokes digitally. Here's more about the process: hgpenningtonart.co.uk/other/ink-to...

Montage of four close up photos of a dead grey brown weevil on a white surface, shown from the side, front and underside. It has a rounded body and a curved snout. Found in a bunch of grapes from South Africa.

Got a free gift in my grapes. An actual weevil, likely Phlyctinus callosus based on his looks and the grapes’ South African origin. He’s a long way from home. 🍇🪲

The painting shows a wheat seedling with three tillers. The lower leaves are the most heavily infected, with areas of yellow chlorosis, regions of pale brown necrosis, and black dots representing pycnidia.

In 2022 I painted Septoria tritici leaf blotch.

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N.B. I no-longer have the original, so I cannot upload a scanned version

The painting shows a tomato stem, with one cluster of tomatoes and one compound leaf. The tomatoes are deformed and blotchy, with pale green/yellow patches. The leaves show mosaic symptoms, with mottling in various shades of green, bulges and deformations.

In 2023 I painted tomato brown rugose fruit virus (ToBRFV) symptoms.

www.hgpenningtonart....

Hiroshima Castle - Part of the Reconstructed Castle: a tree, and a bridge leading to a reconstructed area of Hiroshima Castle

In 2023 I challenged myself to complete one drawing each day whilst on holiday in Japan.

A tree and a bridge leading to a reconstructed area of Hiroshima Castle

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The painting depicts a purple tulip flower with five distorted leaves. Both leaves and flower are marked with brown lesions, showing the classic symptoms of this fungal disease.

I painted tulip fire, caused by Botrytis tulipae, for the March illustration of the @BS_PP plant pathogens calendar.

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Illustration of a strawberry plant showing symptoms of foliar nematode infection, with crinkled leaves, reddish margins, and small, deformed fruit.

I illustrated strawberry foliar nematode (Aphelenchoides fragariae), depicting the crinkled leaves, red margins, and deformed fruit of an infected plant. 🍓

Learn more: hgpenningtonart.com/...

This is the second of twelve nematode illustrations planned for 2026.

A bunch of bananas on a counter, all yellow except for one that’s still mostly green with a darker patch near the top

One banana didn’t get the memo 🍌

The painting shows a coffee branch, with 10 leaves emerging in pairs, one on each side of the stem. Counting down from the terminal bud, the base of the fourth leaf pair has a cluster of finishing flowers, the fifth leaf pair has seven green coffee berries, and where the sixth pair would have been, there are a further six berries. The adaxial (upper) surface is displayed for eight of the 10 leaves, while the abaxial (lower) surface is shown for the remaining two. There are yellow chlorotic patches on the adaxial (upper) leaves, and dark brown necrotic areas in the largest lesions. On the abaxial (lower) leaves, bright orange areas in the centre of the yellow lesions indicate areas of sporulating rust.

In 2023 I painted coffee rust, caused by the fungus Hemileia vastatrix

This is one of my favourite plant disease paintings and was used for the cover @edelponte 's book Plant Disease Epidemiology (R4PDE) https://r4pde.net

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The painting shows a tomato stem, with two compound leaves and a sprig of tomatoes which are just beginning to ripen. The first symptoms of Fusarium wilt often occur when the fruit begins to mature. On the lower compound leaf, the leaflets have turned yellow along one side of the petiole. The upper compound leaf is severely wilted, with some leaves turning brown.

In 2022 I painted tomato Fusarium wilt.

www.hgpenningtonart....

Itsukushima Shrine’s Floating Torii (gate) drawn in black biro on white watercolour paper

In 2023 I challenged myself to complete one drawing each day whilst on holiday in Japan.

Itsukushima Shrine’s Floating Torii (gate)

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I drew Kagoshima Castle Goromon Gate by hand and captured my biro strokes digitally. Here's more about the process: hgpenningtonart.co.uk/other/ink-to...

I’ve added a new landing page to my website: www.hgpenningtonart....

Visitors were landing on one collection (like Plants & Pathogens 2023) and missing the rest. The new page makes it easier to explore all the art collections.

The painting shows an orange branch, with 10 leaves, three twigs and one underripe green orange. The leaves and fruit have chlorotic pale yellow lesions, while the mature lesions on the leaves and lesions on the fruit contain brown necrotic (dead) regions.

In 2023 I painted citrus leprosis on orange, caused by the either citrus leprosis virus nuclear type (CiLV-N), or citrus leprosis virus cytoplasmic type (CiLV-C).

www.hgpenningtonart....

The painting shows a tomato seedling, with a bulbous irregular tumour at the base. The seedling is painted green, whereas the tumour is painted yellow, green and brown in an attempt to depict its irregular structure.

In 2022 I painted tomato crown gall, caused by the bacterium Agrobacterium tumefaciens.

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Snack Time - Macaroon and Matcha Latte

In 2023 I challenged myself to complete one drawing each day whilst on holiday in Japan.

A macaroon and a matcha matte

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I drew Edward Road Baptist Church in Birmingham, England, by hand and captured my biro strokes digitally. Here's more about the process:
hgpenningtonart.co.uk/other/ink-to...

The painting shows a red campion flower cluster with two open pink flowers, two partially open buds and several smaller closed buds and protective leaves. The fungus has coated the anthers with dark brown fungal spores.

In 2023 I painted Microbotryum anther smut, caused by the fungi within the genus Microbotryum (formerly Ustilago).

www.hgpenningtonart....

an ink painting/drawing of rice blast, caused by the fungus Magnaporthe oryzae (syn Magnaporthe grisea).

In 2022 I painted rice blast, caused by the fungus Magnaporthe oryzae (syn Magnaporthe grisea).

www.hgpenningtonart....

The painting depicts a single aecidium on a barberry leaf, with chains of pink aecidiospores. Below the aecidium, there is a mass of hyphae amongst the host cells.

In 2025 I illustrated Puccinia graminis aecidium, with aecidiospores, on a barberry leaf.

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This painting won the “Magnified” category for the Art in Phytopathology 2025 contest 😊

Reclining Tree, Kyōto Imperial Palace Gardens: an incredible tree that had been trained into a reclining posture, with its trunk running parallel to the ground.

In 2023 I challenged myself to complete one drawing each day whilst on holiday in Japan.

Reclining Tree

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I drew Llanthony Priory by hand and captured my biro strokes digitally. Here's more about the process: hgpenningtonart.co.uk/other/ink-to...

The painting shows a trifoliate soybean leaf covered in small reddish-brown spots. Some regions of the leaf show yellow discolouration.

In 2023 I painted soybean rust, caused by the fungi Phakopsora pachyrhizi or Phakopsora meibomiae.

www.hgpenningtonart....

The painting shows a compound horse chestnut leaf. There are elongated, yellow, pale patches on the leaf, areas of which have begun to turn brown.

In 2022 I painted horse chestnut leaf miner (Cameraria ohridella).

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Komainu near near Fushimi Inari Taisha Shrine: komainu (lion-dog guardians) at the entrance to a shrine.

In 2023 I challenged myself to complete one drawing each day whilst on holiday in Japan.

Komainu

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The painting features a red double camellia flower with distinctive white mottling, characteristic of the virus. A nearby flower bud shows a similar pattern. Most of the surrounding green leaves display yellow chlorotic mottling, highlighting the foliage symptoms caused by the infection.

I painted Camellia yellow mottle virus symptoms for the February illustration of the BSPP 2024 plant pathogens calendar.

bspp.org.uk/product/...

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Illustration of an onion plant infected with Ditylenchus dipsaci, showing the whole plant with roots and leaves, a horizontal cross-section of the bulb with concentric rings, and a vertical section showing internal tissue damage.

Illustration of Ditylenchus dipsaci on onion, showing foliar distortion and bulb damage in cross-section.
This is the first of twelve nematode illustrations planned for 2026, a little later than intended.

See more plant pathology illustrations: hgpenningtonart.com/...

I passed my JLPT N5 (Japanese Language Proficiency Test level N5)! 🎉It was close, but I made it!!!

Close-up of yellow-green lichen growing on a stone ledge beside the River Thames, with the blurred outline of the Houses of Parliament and several boats in the background on a cloudy day.

Lovely lichen