File:Tallest Pisonia grandis on Palmyra with H E Cooper.jpg

Summary
Plate XIX from page 49 of Bulletin No. 4, "Palmyra Island with a Description of Its Flora", by Joseph Rock, published by College of Hawaii Publications in April 1916. https://evols.library.manoa.hawaii.edu/bitstream/10524/23293/1/college-b-4.pdf

Man in photo is owner Henry E. Cooper, with whom Rock explored Palmyra Atoll in 1913.

Source caption: "Pisonia grandis R. Br. The biggest tree on Palmyra; the vegetation of Eastern Islet and Papala Islet consists mainly of this tree with Polypodium phymatodes covering the loose coral."

Associated source text: "On all the islets, more or less common; most abundant on Eastern Islet, where it forms practically the sole tree growth (see Plate IX). The tallest tree of this species is eighty feet in height and has a trunk of about 18 feet in circumference. (See Plate XIX.)"