a rose by any other name is stone fruit, & dessert

IN ANOTHER LIFE I WAS A SCIENTIST, but in this one I got all of the curiosity but none of the education. So when the topic of Stone Fruit Week loomed as the theme for Week 4 of the Third Annual Summer Fest recipe swap (see all the links below to more, more, more), my recessive scientist trait flared and I got to asking: What’s a stone fruit, anyhow? Read on for some fun genetic facts (and a recipe for what I refer to—being scientific, you know—as the universal solvent of all fruit desserts, clafoutis batter).

What’s a Stone Fruit?

WHAT WE CALL STONE FRUITS all grow on trees in the genus Prunus, and have a hard, stony pit inside them (their seed), with fleshy fruit around it—unlike so-called pome fruits (see below).

Apricots, cherries, nectarines, plums (and therefore prunes), and some interspecies hybrids of the above, like plumcots and pluots, are all stone fruits. So are peaches (like the ones in the 1940 harvesting photo by Lee Russell, in the Library of Congress archive, top, or just above in the print from Boston Public Library’s).

And then there’s the trick-question one, the stone fruit you think of as a nut. What’s that?

Almond, of course: Prunus dulcis.

What’s a Pome Fruit?

I KNOW, IT’S STONE FRUIT WEEK, but hey, this is interesting…and there will be a point made any moment (or so the headline promised).

Other popular edible tree-grown fruits in our neck of the world include the pome fruits—apples and pears, in the genus Malus and Pyrus, respectively. The word pome simply comes from the Latin word for fruit.

And here comes my point:

But They’re All Roses in Disguise!

STONE OR POME, THEY’RE ALL ROSES—meaning members of the Rose Family, or Rosaceae, and therefore all related.

That’s the overarching botanical “aha,” one that I knew but rarely thought about, and it goes a little farther:

Raspberries, blackberries and even strawberries are Rose Family relatives, too.


(Are you all still awake? Dessert will be served pretty soon, promise.)

Peach Is One Really Juicy Genome…

NOW JUST A DOLLOP MORE GENETICS (AS IN GENOMICS): Apparently the peach is one juicy genome, from a geneticist’s point of view, with a small number of chromosomes—8—and other cooperative aspects.

So over the last decade, on to mapping Prunus persica an international team of scientists went, and the Peach Genome Sequence was released on April 1 this year—the first genome completed in the Rosaceae family. North Carolina State, Washington State, and Clemson universities were all involved; a popular standard-size peach rootstock cultivar, ‘Lovell,’ was the specific plant whose genes were mapped.

The peach turns out to be a model genome species for understanding all the other Prunus—remember those are our stone fruits, from Lesson 1, above—as well as for other species in the Rosaceae, and is expected be useful to plant breeders who want to develop peaches and related plants with particular desirable characteristics.

Tada! Now…

Dessert, Anyone?

LAST YEAR I GAVE YOU MY (MARTHA-ADAPTED) RECIPE for clafoutis batter, or what I call the universal solvent for fruit desserts. This concoction, like a thin pancake batter, turns fresh fruit as diverse as clementines to cherries, strawberries to plums, and even some dried ones if you dare try, into a fast, easy but sophisticated final course. Experiment.

The recipe I always use (above, with peaches in it) is here.

And then I got lost recently again in Michel Roux’ astonishing book simply called “Eggs,” and found another I’m enjoying. His batter goes like this (and like Martha, he used ripe pitted cherries, 3/4 pound, and lots of butter to grease the baking pan they’re going in):

Clafoutis Batter from Michel Roux

2 eggs
generous ½ cup all-purpose flour
6 ½ Tbsp. butter, melted and cooled
1/3 cup granulated sugar (plus extra for top)
2/3 cup milk, cold
1 vanilla bean, split lengthwise (mea culpa, I use extract)
1 Tbsp. Kirsch (optional)

The Steps
Very lightly beat eggs in a bowl, and add flour.
Whisk in melted butter, and gradually mix in the sugar and milk.
(Scrape vanilla beans from pod into mix; add Kirsch. I added extract here.)
Generously grease an 8-inch, 2-inch-deep ovenproof pan (he uses 5 Tbsp. more butter), spread the cherries in the bottom, and pour batter over them.
Bake for 10 minutes at 400 degrees, then lower the oven to 350, and cut several more Tbsp. of butter onto the top before baking another 25 minutes or until set, and a knife inserted comes out clean.
Dust with the remaining sugar; let stand a bit, but serve warm.

If you don’t believe me, or Martha, or Michel— maybe Mark Bittman can convince you? (I only read recipes by cooks whose names start with M, apparently. Kidding.)

How You Can Join in Summer Fest:

So now it’s your turn: Have a recipe or tip that fits any of our weekly themes? Starting with our posts of Wednesday, July 28, for five Wednesdays, you can contribute in various ways, big or small.

Contribute a whole post, or a comment—whatever you wish. It’s meant to be fun, viral, fluid. No pressure, just delicious. The possibilities:

Simply leave your tip or recipe or favorite links in the comments below a Summer Fest post on my blog, and then go visit my collaborators and do the same.

The cross-blog event idea works best when you leave your recipe or favorite links (whether to your own blog or someone else’s) at all the host blogs. Yes, copy and paste them everywhere! That way, they are likely to be seen by the widest audience. Everyone benefits, and some pretty great dialog starts simmering.

Or think bigger: Publish entire posts of your own, if you wish, and grab the juicy Summer Fest 2010 tomato badge (illustrated by Matt of Mattbites.com).

The 2010 Schedule:

  • Wednesday, July 28: CUKES AND ZUKES. Read it here.
  • Wednesday, August 4: CORN. The story.
  • Wednesday, August 11: HERBS-BEANS-AND-GREENS WEEK (any one or both/all, your choice).
  • Wednesday, August 18: STONE FRUIT.
  • Wednesday, August 25: TOMATO WEEK. How do you like them love apples?
  • And then…more, more, more if you want it (potatoes? sweet potatoes? root veggies? winter squash?). You name it.

And in case I forget what week it is, won’t somebody remind me on Twitter? Thanks. We’ll be talking it up there, too.

That’s how a Summer Fest works.

This Week’s Stone Fruit Links

  1. Purple Cook says:

    For Summer Fest: The peaches from our CSA just seem to get eaten – they are so good. No opportunities to cook with them.

    Since blackberries and stone fruits are both members of the rose family, I thought I would share my blackberry recipes.

    I have two pies made by different methods.
    No. 1 is good for making and eating right away.

    No. 2 is good for freezing.

    I also made blackberry ice cream.

  2. Sarah says:

    What an interesting post, thanks for sharing your research!

    My entry into Summer Fest this week is my newest favorite cold dessert

    Nectarine Sorbetto, my version is made with raw honey

    and a favorite I’m saving up for cold wintry mornings,

    Ginger Peach Pineapple Fruit Butter

    Thank you for hosting! I can’t wait to dig into all the other recipes posted!


  3. Michelle says:

    Virtual is great and all, but please can we all get together in real life and eat Clafoutis in a real live summer fest? I’ll bring the sangria.

  4. Marilyn says:

    I think your latent scientist should come out to play all the time! The more you know.

    Your research into stone fruit and their “universal solvent,” clafoutis, hits the perfect late-summer spot. Thanks for hosting another delicious year of Summer Fest.

  5. One Hungry Mama says:

    Such great info! THANK YOU for another great week of Summer Fest!

    My recipes this week are a Perfected Peach Cobbler (ever feel like cobbler filling is a little too sweet and the topping not quite sweet enough? You’ve got to try this!) and Grilled Honey Basil Peaches (with Orange Honey Ricotta Sauce, if you like!).


    1. Margaret says:

      Welcome, Ngoc. Sounds delicious! I need to look up about Rainier cherries in particular — thanks for the suggestion. See you soon.

    1. Margaret says:

      Welcome Stephanie — and I know, the “2 or 3 desserts a day” temptation is huge during this peak fruit season. :)

      Welcome, Julie, and thank you for the fruit salad. Delicious.

      Welcome, Lori. I am nothing short of delighted to have a gluten-free clafoutis recipe — can’t wait to try it. Thanks to you all, and come back soon.

  6. Estyn says:

    That’s so interesting that they’re all roses! My Rugosa roses have got giant red hips on them, bigger than the crabapples.

    1. Margaret says:

      Welcome, Jennifer. I am fascinated by your peach salsa — and by the Weck jars (which I have never used).

      Welcome, Leah. No, blueberries are acid-lovers that fall into the Ericaceae (Heath or Heather Family) — where things like Rhododendrons belong, too. But your recipe sounds so good (and the blueberries so seasonal) that all is forgiven. :)

      Hope to see you both soon again.

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