susanhewitt's Favorites
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Bristly Rose Sawfly Cladius difformisObserver
susanhewittDescription
On a cultivated rose bush.
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Cherry Shot Hole Wilsonomyces carpophilusObserver
susanhewittDescription
???
On underside of leaf of Cherry Laurel, Prunus lauroceras.
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Common Slit-Limpet Emarginula fissuraObserver
nobiscuitsDescription
Tiny limpet like shell with a slit. Marine.
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Lily Leaf Beetle Lilioceris liliiObserver
susanhewittDescription
Several larvae, each one covered in a big pile of their own poop for protection.
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Sleepy Catchfly Silene antirrhinaObserver
steven-cyclistDescription
each seed is about 1mm, and has no notable flavor
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Cabbage Leafminer Liriomyza brassicaeObserver
susanhewittDescription
On Nursery Bittercress (Cardamine occulta) in a tree pit. You can see the larva in the mine.
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Viruses Kingdom VirusesObserver
susanhewittDescription
The plant that this virus is affecting is Philadelphia Fleabane, Erigeron philadelphicus.
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Fungi Including Lichens Kingdom FungiObserver
steven-cyclistDescription
(the black stuff, not the white stuff.) on shepherd's purse
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Autumn Olive Elaeagnus umbellataObserver
ken-potterDescription
Potawatomi Trail alongside Pickerel Lake to 1.5 miles down Pinckney-Waterloo Trail.
The rest of the bush looks like normal Autumn Olive. Ones with variegated
leaves normally observed as lower leaves/branches on otherwise normally colored bushes. So far all I've observed are growing close to water; lakes, ponds, wetlands.
@bouteloua any idea of why some Autumn Olive leaves get this coloration?
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White Rust Albugo candidaObserver
cooperjDescription
white blister rust. First NZ record on this host but very common and widespread in Christchurch. First photo shows Albugo candida with the (greyer) downy mildew Hyaloperonospora lunariae, itself a new record for New Zealand (which I can't add because the NZOR lookup isn't working). The latter species seems to be consistently associated with the former across several sites in Chch.
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Taphrina farlowiiObserver
djringerDescription
What causes this odd growth on Prunus serotina?
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White Rust Albugo candidaObserver
susanhewittDescription
On Capsella bursa-pastoris.
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Observer
susanhewittDescription
Pale leaf spots on Camellia leaves --a garden Camellia -- I suppose Camellia japonica?
Some of the spots are ring spots, but quite faint.
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Pymav Pagoda yellow mosaic associated virusObserver
susanhewittDescription
On Japanese Pagoda Tree, Styphnolobium japonicum.
A couple of years ago this tree was cut down all the way, flush with the ground, but it sprouted back up quite vigorously.
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Tellins and Allies Family TellinidaeObserver
susanhewittDescription
I am not sure which species this is.
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Simomactra planulataObserver
susanhewittDescription
During the afternoon low tide.
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Observer
susanhewittDescription
A strange-looking gall on a leaf of Ipomoea pes-caprae, goat's foot morning glory
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Human Homo sapiensObserver
susanhewittDescription
More than we are used to seeing.
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White Blister Rust Disease Wilsoniana blitiObserver
susanhewittDescription
A water mold on the underside of leaves of Amaranthus blitum, the Mediterranean Amaranth.
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White Blister Rust Disease Wilsoniana blitiObserver
susanhewittDescription
This observation is for the white spots on the underside of the leaves of this Amaranthus blitum. This pathogen is very common indeed in this location, on many individual plants of this same species.
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Genus MacandreviaObserver
caritaDescription
On flotsam (bucket), perhaps from Asia
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LifeObserver
susanhewittDescription
Some sort of interesting-looking pathogen on a leaf of Geum, an avens plant.
Could this be the early stage of Downy Mildew?
I wonder, because this website
https://extension.umd.edu/hgic/fungal-leaf-spots-annuals-bulbs-groundcover-perennials-and-vines
says about Downy Mildew:
"Early symptoms are usually noticed as light green or yellow angular patches on the upper leaf surfaces. ... Perennials commonly troubled by downy mildews include artemisia, aster, centaurea, coreopsis, geum, lupinus, potentilla, rudbeckia, veronica, and viola."
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LifeObserver
steven-cyclistDescription
Fossilized marine life — not sure what
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Arthropods Phylum ArthropodaObserver
steven-cyclistDescription
or possibly the mites that carry RRD?
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Common Banded Pond Snail Filopaludina bengalensisObserver
sksajanDate
the past
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Cmv Cucumber mosaic virusObserver
susanhewittDescription
On Nandina domestica -- Heavenly Bamboo. The other plants nearby (there is a row of them which were all put in at the same time) have grown normally and done well, but this one is extremely stunted -- it has been this tiny for three years! The leaves are also narrower than they should be, and they curve downwards.
I am guessing this is caused by a virus.
This site,
http://ipm.ucanr.edu/PMG/GARDEN/PLANTS/DISEASES/nanvirus.html
says:
"Cucumber mosaic virus infection causes wine red discoloration of new spring growth in nandina. Leaves may be thinner (more narrow in width) than normal and cupped downward. There may be fewer flower buds and berries on infected plants."
"Plantago asiatica mosaic virus causes a relatively mild mosaic; the reddening of foliage may not be very intense or extensive. There may be stunting and leaf distortion of infected Nandina."
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Viruses Kingdom VirusesObserver
susanhewittDescription
A Rose Mosaic Virus on leaves of a Rosa chinensis.
Apparently spring is the time to see these because the markings become a lot less visible as the leaf matures.
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Scale Insects Superfamily CoccoideaObserver
zihaowangDescription
On wound wood of Styphnolobium japonicum.
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Black Cherry Leaf Gall Mite Eriophyes cerasicrumenaObserver
zakfosterDescription
On wild black cherry
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Viruses Kingdom VirusesObserver
esummerbellDescription
Update: the plant is the cultivar Osmanthus heterophyllus ‘Goshiki’. Trying to figure out if the coloring is genetic or from a cultivated virus.
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Fungi Including Lichens Kingdom FungiObserver
susanhewittDescription
On leaves of goat foot morning glory.
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Genus BegomovirusObserver
susanhewittDescription
A mosaic virus in a Merrimia plant growing in a very weedy wide verge on the side of this access road down to the north end of the Four Seasons property. The ground is low-lying here and does not usually ever dry out completely.
As you can see in image 2, the plant has a noticeably hairy petiole and a hairy stem too. With some contemporaneous help from @adorantes, we considered the host plant to be a Merremia:
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LifeObserver
srallDescription
@susanhewitt do you know what causes spots on Impatiens (jewelweed)?
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Atlantic Rangia Rangia cuneataObserver
jmg198Description
Potomac River on a sand/rocky beach. Cherry Stone clam?
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Fungi Including Lichens Kingdom FungiObserver
dbarberDescription
This didn’t seem to be part of the surrounding fungus, but maybe coming through from underneath. It was firm and seemed to be attached directly to the underlying fallen tree
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Oak Lecanium Scale Parthenolecanium quercifexObserver
srallDescription
As best I remember it was on oak, but it was long time ago
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Phyllosticta deciduaObserver
susanhewittDescription
On Lesser Burdock, Arctium minus.
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Cockles Family CardiidaeObserver
janinasDescription
The colour is very intense pink
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Fungi Including Lichens Kingdom FungiObserver
susanhewittDescription
Unusual red spots on Hedera helix leaves.
I found the following info here:
http://www.ivy.org/about_bv3.htm
Ivy leaf spot can be caused by a variety of fungus species as well as bacteria. Fungus Leaf Spot can be caused by Colletotrichum trichellum, Amerosporium, Glomerella, Phyllosticta, and Ramularia. They appear as irregular tan to brown spots or may cause marginal browning of the leaf edges.
Bacterial Leaf Spot is caused by Xanthomonas campestris pv. Hederae. It first appears as a light green or water-soaked to oily circular spots. As the disease progresses the spots will enlarge and turn dark brown to black. There may also be a yellow to red halo around the spot. Petiole and stem cankers can also develop.
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Citrus Flatid Planthopper Metcalfa pruinosaObserver
susanhewittDescription
On a stem of Scarlet Beebalm, Monarda didyma.
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Genus ColletotrichumObserver
susanhewittDescription
These (presumably) fungal leaf spots are on the leaves of Masterwort, genus Astrantia, family Apiaceaea.
In the English Garden section of the Conservatory Garden, in Central Park.
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Genus ColletotrichumObserver
susanhewittDescription
Some kind of interesting angular leaf spot (presumably fungal) on leaves of Masterwort = Astrantia, family Apiaceae.
In the English Garden part of the Conservatory Garden, in Central Park.
Somebody on a commercial site reported the same thing and has a similar photo:
