Note 154 — Chapter IV · Tendril-Bearers—(continued).
Reading edition
Prof. Asa Gray informs me that the tendrils of P. sicyoides revolve even at a quicker rate than those of P. gracilis; four revolutions were completed (the temperature varying from 88 degrees-92 degrees Fahr.) in the following times, 40 m., 45 m., 38½ m., and 46 m. One half-revolution was performed in 15 m.