What are these fruits?

Can you identify these fruits and how they are used? The round one smells like a walnut, I am not sure of the other one but I recently read something about a paw paw fruit and this seems similar to the picture of it, it is very hard, if it is edible will it ripen out of tree? Thanks.

How did you come by these plants?

Re #1. The walnuts I knew had a green outer husk. Possibly this is a premature fall? One way to check is to see if there are other fruits laying on the ground with other colors. Handling cut walnut skins can stain your hands black and in the past people used to use the skins to dye clothing and even their hair.

Re #2. What does it smell like? Supposedly Papaws have a distinctive sweet odor that will become more pronounced as it ripens. Like bananas, they can be eaten at different stages of ripening. But I'm not saying it's papaw, because sadly I never found any as a kid. Today there are so many varieties of invasive plants that it pays to do some research. There's a plant in my own yard that might be the same as June berry, but I can't be sure because there are so many ornamentals that are similar. One clue for papaws might be the leaves. Supposedly the leaves are very long -- like a foot long.

Edit: This site has images of what the actual Papaw fruit looks like. In particular notice the unique way the seeds are laid out. Most of my attempts to google papaw ended up finding papaya !

Edit 2: Offhand, that doesn't look anything like any of the papaw images I'm finding.

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Just walking in the neighborhood I found these plants by the side of the road.

There was only one of the walnut like fruit that I could see and a quick look did not identify where it had fallen from. 

The other fruit does not seem to have much detectable smell.

The second pick looks like Magnolia.

I agree that the second one looks like a magnolia seed pod.

Pawpaws are smooth ovals (sometimes kidney shaped), and look somewhat like a small green mango. Atamoya and cherimoya, which are related to pawpaws, have a superficial resemblance to the magnolia seed pod, but the scales on the magnolia will peel apart, and the ones on cherimoyas and atamoyas are really undulations and indentations, just part of the continuous skin.

Photo of my atemoya fruit

The first one (round) looks like a more or less ripe black walnut. If so, if you scrape off the leathery husk there will be a rock-hard shell inside, much harder than a familiar English walnut. 

In posts like this, it would be helpful to 1: give some indication of the objects' sizes and 2: give some kind of information about the  location - Arizona? Maine? The possibilities and answers could be quite different for different places.

I found these in Northern Virginia near Washington DC.

OK, thanks for adding the location information. I agree with those who suggested Magnolia fruit for the pointy one, and Virginia certainly has those. See here, for instance: https://www.alamy.com/stock-photo/magnolia-fruit.html Magnolia images 

Virginia is also well within the range of black walnuts (search for black walnut distribution map).

After a few days by the window the walnut outer skin was soft. I cut the outer skin with a knife and gloved hands and then there was the hard shell. I cracked that in a pestle and it was walnut with some good meat in it.

The other one does seem to be magnolia. After a few days by the window it split on its own as shown. Some websites state the fruit is edible with a very unique taste but they show red sacks coming out of a fruit like the one pictured. Does this fruit ripen outside the tree?

Also as I was going by the side of a road found this third fruit that was on a tree and the fruits were 3 or 4 bunched up together. I cut one leaf of it too for identification. What kind of fruit is this one? 

Thanks. 

Interesting that the Magnolia fruit has changed. I think they develop shiny red seeds where the white things are, but don't know if they can do the whole process off the tree. (They could be other colors in different species of Magnolia.) Are there more fruits still on the tree that you can keep an eye on? I know nothing about their being edible. 

Isn't your "third" fruit another black walnut? The leaf looks consistent with a black walnut and the fruits can occur in clusters - it depends on pollination success. I assume the walnut meat had a different taste from commercial (=English) walnuts? It's a much deeper, more intense flavor. My father used to pick them up from under trees near our town hall in Massachusetts. After drying them and removing the husks we had family shelling sessions with hammers and bricks. Once we had enough that my mother made a black walnut pie using a pecan pie recipe -- wow! I've harvested them around my town in northern Illinois several years - there are lots of black walnut trees in many local forest preserves and a fair number along streets.

I picked up this other fruit that is probably a Magnolia also from another tree but the 2 trees looked very different to my eyes. The first one was a large tree with very deep color leaves that looked shiny, the second one was much smaller and the leaves didn't look shiny. 

The other fruit does look similar to a walnut but I don't think it is a walnut. The tree was much shorter than the walnut trees that I have seen elsewhere. Also it does not seem to smell like walnut. Perhaps after a few days on the window sill it will reveal itself.

I also picked this other fruits in the last picture and wonder what it is. 

It could be a different species of Magnolia, I suppose. It's clearly further along with fully developed seeds.

I don't know how big black walnuts have to get before they bear fruit and nuts. There's a related species, butternut that has a slightly different fruit, though I forget how they differ. 

The new one could be buckthorn (genus Rhamnus); the invasive species I'm used to in the Midwest has dark blue berries, but these could be not yet ripe. Buckthorns hang onto their green leaves much later than most native shrubs/trees around here, so wait another month or so and check them out...

I cracked both nut fruits and both had some nut inside. One of them looked black the other one lighter color. Perhaps true to their possible names one was the black walnut and the other the butternut walnut. If so the butternut walnut tree is shorter, at least the one I took this fruit from. 

Also found these at the side of a busy road. They look like miniature asian pears to me. 

Bijan, It's probably best that you join a Forum or FB page for local foraged seeds and plants. The main focus for this Forum is SFG.

OK.