Tag Archives: temperature

Hardy kiwis

I’ve had to wait over 10 years, but my female kiwi finally set fruit in 2014 after probably 12 years. The fruit are tiny — about the size of a big grape — but wonderfully delicious.

Colin Purrington Photography: plants &emdash; hardy-kiwi-1

Colin Purrington Photography: plants &emdash; hardy-kiwi-2

Colin Purrington Photography: plants &emdash; hardy-kiwi-3

Skunk cabbages in snow

Photograph of Eastern skunk cabbage (Symplocarpus foetidus) covered with snow.  I didn’t confirm with a thermometer, but these are famous for heating themselves up, maintaining 35 °C (95 °F) internal temperature even when outside air is below freezing.  Heat helps volatilize the awful smell, which can be attractive to flies and beetles, but also creates a hot “room” inside the curved leaf (spathe) that surrounds the inflorescence on the spadix (hidden from view at this angle).  But a more likely hypothesis of why this ability evolved is that thermoregulation protects pollen tube growth and female reproductive structures from frost damage. Either way, one of my favorite plants. Growing in the Crum Woods, Swarthmore, Pennsylvania.

colin purrington photography: plants &emdash; Eastern skunk cabbages (Symplocarpus foetidus) in snow.  Crum Woods, Swarthmore College, Pennsylvania. They actually heat up to provide warm environments for flies, their primary pollinators.