Professor Asa Gray, Prof. Oliver, and Dr. Hooker have
afforded me, as on many previous occasions, much information and many
references.
{16} Journal of the Linn. Soc. (Bot.) vol. ix. p. 344. I shall have
occasion often to quote this interesting paper, in which he corrects
or confirms various statements made by me.
{17} I raised nine plants of the hybrid Loasa Herbertii, and six of
these also reversed their spire in ascending a support.
{18} In another genus, namely Davilla, belonging to the same family
with Hibbertia, Fritz Muller says (ibid. p. 349) that "the stem
twines indifferently from left to right, or from right to left; and I
once saw a shoot which ascended a tree about five inches in diameter,
reverse its course in the same manner as so frequently occurs with
Loasa."
{19} Fritz Muller states (ibid. p. 349) that he saw on one occasion
in the forests of South Brazil a trunk about five feet in
circumference spirally ascended by a plant, apparently belonging to
the Menispermaceae. He adds in his letter to me that most of the
climbing plants which there ascend thick trees, are root-climbers;
some being tendril-bearers.
{20} Fritz Muller has published some interesting facts and views on
the structure of the wood of climbing plants in 'Bot.
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