During the past three decades, plant anatomists have established a number of lines of phylogenetic specializations in the structures of the stele.
(1946). "The Role of Wood Anatomy in Phylogeny". American Midland Naturalist36 (2): 362–372. DOI:10.2307/2421510.
Harry's first publication (in 1951) was a short paper in the Bulletin of the Torrey Botanical Club entitled "Interesting weeds in New York City." It was during some of his collecting in the wilderness which is the Bronx that he was accosted by several policemen in a squad car, who demanded what he was doing with his odd vasculum over his shoulder. He explained he was a botanist and he was collecting plants. "You know all these weeds?", asked one the men. Upon being assured that he did, he was asked to join them in the car which drove some distance until they came to an open lot on which there was a flourishing crop. "What is it?" "Marihuana," was the reply. Whereupon one of the officers exploded, "Damn those kids, they told us they were tomatoes."
(1982). "Harry E. Ahles 1924–1981". Bulletin of the Torrey Botanical Club109 (1): 84–86.
Every time Botany and Zoology fuse, Botany ends up screwed to the wall."
as quoted by John Philip Trinkaus in: Trinkaus, John Philip (2003). Embryologist: My Eight Decades in Developmental Biology. p. 196. ISBN 9781888308143.