Puncturevine

Yesterday I finally fixed the flat in the rear tire of my road bike. Feeling down the inner surface of the tire, I noticed two tiny embedded thorns, each capable of producing a leak in the tire. I gently worked these out of the tire and installed the new tube.

On page one of today’s Davis Enterprise, the paper ran a story on the bane of cyclists that gave me the flat, puncturevine. According to one bike mechanic, most of the flats in the Davis area are now due to this plant. The lentil-sized seeds of this weed have hard stout spines for dispersal, whether via fur or tires. The common names for the weed are somewhat ominous—caltrop, tackweed, goathead, Texas sandbur—and its scientific name is the alliterative Tribulus terrestris. But I never seem to see the actual plant, instead just finding the seeds in unfortunate places.