Two Trees

In a Lunar-orbit space habitat:

"The Tree."
-Poul Anderson, Harvest Of Stars (London, 1994), 27, p. 262.

"Sequoia, biological experiment, genes cunningly mutated, growth hastened by chemistry and allowed by weight that dwindled as the crown rose..."
-ibid., p. 263.

In a base on Mercury, a holo wall shows:

"...a view up the trunk into the waving branches of the tremendous redwood they've been growing for three hundred years, in Hovestraydt City on the Moon."
-Larry Niven, "Madness Has Its Place" IN Niven, Ed., Man-Kzin Wars III (New York, 1990), pp. 1-34 AT Chapter III, p. 33.

Tomorrow or soon, more on kzinti psychology from Poul Anderson.