Stumped by Shamrocks

I was going to do a rather straightforward post on the shamrock for St. Patrick’s Day, but it turns out that there is nothing straightforward about this plant, but rather an age-old confusion about what it actually is/was. The history of the shamrock and its association with Ireland is misty and murky: if indeed St. Patrick plucked a tender three-leaved (trefoil) sprig of some sprawling plant to illustrate the Holy Trinity we don’t know what that plant was, nor do we know precisely what plants Elizabethan authors like Edmund Campion and Edmund Spenser were referring to when they referenced the “wild” Irish eating shamrocks. The general consensus is that the word is derived from the gaelic seamróg, a diminutive form of seamair, meaning “clover”, but there is no botanical consensus that the shamrock is a clover variety: opinion seems to have been divided between various varieties of clover (trifolium) or wood sorrel (oxalis) for quite some time, with a weed called medic (medicago) mentioned occasionally as another candidate for the shamrock label. If you look at illustrations of the first two plants in one of the most lavishly illustrated medieval herbals, the Tractatus De Herbis (British Library MS Egerton 747), you can understand the confusion between these two look-alike, supposedly sacred plants.

Clover (also called “Trinitas”) on the lower right and Wood Sorrel (also called “Alleluia”) on the upper left in BL MS. Egerton 747, c. 1280-1310.

The other source of confusion, much more modern and almost-exclusively American, I think, is between the shamrock (whatever it is) and the four-leaf clover. Both might be clovers, but if you embrace the trinitarian nature of the former, you can’t also have the secular charm of the latter–or can you? Americans seem to want it both ways, and consequently they fashion a St. Patrick’s Day holiday that combines a bit of faith and fortune, and much, much, much more fortification.

St. Patrick’s Day postcards c. 1906-11 from the New York Public Library’s collection: a trefoil shamrock, four-leaf clovers, and both on one card.

There is much less confusion about how the shamrock (whatever it is) became inextricably identified with Ireland: this was much more a Victorian development than a medieval or early modern one. In the visual culture of the Great Britain, the Irish shamrock looms large, along with the English rose and the Scottish thistle (and occasionally the Welsh leek). These symbols appear together on all sorts of items–textiles, pottery, wallpapers–as both official “Arms” of the United Kingdom, decorations for royal palaces and personas, and patriotic embellishment.

James King design for the National Arms of Great Britain, c. 1890; Norris & Company silk curtain border design for Windsor Castle, 1850s; C.F.A. Voysey textile design with garland of Tudor roses, thistles and shamrocks, c. 1915, Victoria & Albert Museum Collections.

These integrative designs are interesting aesthetically and politically, but you can’t beat a single shamrock (whatever it is), especially if it is made up of diamonds! Paired, perhaps, with a companion four-leaf clover brooch for extra luck. But even if there are no sparkling stones, a bright green shamrock (like the holiday it has come to represent) represents hopefulness and gaiety in the often murky month of March.

Diamond shamrock brooch, c. 1890, Victoria & Albert Museum; Art Deco platinum, diamond and jadeite clover brooch, c. 1935, Skinner Auctions; Ullman Manufacturing Co. calendar page for March, 1906.