Winter is the season for citrus fruit, and January is the month for breaking out of old routines, so stop staring at your navel and learn about one of the weirder citrus varieties.
I’ll never forget the day one of my general botany students brought to class a Buddha’s hand citron, pulled from a tree right outside our classroom. I had only recently moved to northern California from Indiana, and I’d never seen anything like it: it was a monstrous mass of a dozen pointed twisted fingers splayed irregularly from a stout base. It had the firm heft and girth of a grapefruit and the unmistakable pebbled skin of a citrus fruit, so I wondered whether my student had found a grossly deformed grapefruit; but the oil in the peel smelled heavenly and not at all like a grapefruit. In class we cut through a big finger and found no juicy segments, just white citrus pith all the way through.
Immature Buddha’s hand on the tree
We eventually discovered that this fascinating fruit was a Buddha’s hand citron, Citrus medica variety sarcodactylis, meaning fleshy (sarco-) fingered (-dactyl) citron. Since that day many years ago I’ve become an unapologetic (if surreptitious) collector of the fruits from that same campus tree. The citrons do not drop from the tree on their own, yet I often find one or two lying nearby, probably torn off by a curious tourist or student and then abandoned. Obviously these fruits need a good home, and where better than the window sill in my office?
The first time I left one closed up in my office over a weekend, I opened the door on Monday morning to a waft of fruity floral aroma. It turns out that many people in China and India use the fruit to scent the air, although in west Asia and Europe the fleshy fingers are more often candied or used to flavor alcohol. I do both: the fruits make my office smell nice until they are fully yellow, and then I cook them.
It can be difficult or expensive to get your own hands on a fingered citron, but it’s easy to find a navel orange almost any time of the year. Fortunately, the patterns underlying the morphology of the fingered fruit can also be seen in an everyday navel orange. Between our photos of Buddha’s hands and your own navel orange, you should be able to follow along at home.Continue reading →
Enjoy Jeanne and Katherine’s holiday take on figs and figgy pudding which will appear on December 19th in Advent Botany 2016. For a longer read, check out our original 2013 version.
Figs reach their peak in summertime, growing fat enough to split their skins under the hot sun. It’s nearly impossible to keep up with a bountiful tree, and many a neglected fig is extravagantly abandoned to the beetles.
Beetles gorge on a fig. Click to enlarge
But here we are, halfway around the calendar in dark and cold December, and we feel grateful for the figs we managed to set aside to dry. Their concentrated sweetness is balanced by a complex spicy flavor that makes dried figs exactly the right ingredient for dark and dense holiday desserts. As we mark another turn of the annual cycle from profligate to provident, what better way to celebrate than with a flaming mound of figgy pudding?
Well, except that the traditional holiday pudding contains no figs. More on that later, along with some old recipes. First, we’ll unwrap the fig itself to find out what’s inside.Continue reading →
In 2016, the International Year of Pulses, we’ll be writing a lot about pulses (dried beans and peas), and we’ll also tackle the huge and diverse legume family more broadly. This weekend Katherine kicks things off with February’s Botany Lab of the Month: beans and chickpeas for your Superbowl bean dip and hummus.
The species name of Cicer arietinum means “ram’s head.”
Beans are a bit like football: a boring and homogeneous mass of protein, unless you know where to look and what to look for. In this lab, we’ll make the smashing of beans into bean dip or hummus much more interesting by taking a close look at some whole beans before you reduce them to paste. The directions are very detailed, but this whole lab can be completed in the time it takes to explain the onside kick.
Of course, if you have only pre-mashed refried beans in your pantry, it’s too late. Then again, if you are using canned refried beans for your recipe, you are probably not living in the moment or sweating the details right now. That’s OK. Go watch the game and let us know when someone scores.Continue reading →
Biologist Jessica Savage answers a few of our questions about her research on the physiology behind giant pumpkin size.
In October 2014, a giant pumpkin grown by Beni Meier of Switzerland tipped the scales at 1056 kilograms (2323 pounds) and set a new world record for the heaviest pumpkin ever weighed. Modern competitive pumpkin growers have been imposing very strong selection on pumpkin size for decades. Pumpkin fruit size keeps climbing, and old records are broken every year or two (Savage et al. 2015).
Beni Meier with his 2014 record-winning 2323-pound pumpkin, presumably a specimen of the Atlantic Giant variety of Cucurbita maxima. Photo from here.
It’s high season for kale and apples, and Katherine just can’t stop talking about epicuticular wax
There is something nostalgic about kale and its softly glowing dusky cast that suits late autumn and early winter. It looks rustic and thick-skinned, steeled against falling temperatures and short days. It even shrugs off winter rains. Water beads up and rolls right off its leaves. Kale’s ageless still-life look is due to its extraordinary epicuticular wax, a legacy of the first plants to survive on dry land. Continue reading →