This seems to have been a 60pg article (or a seven-page pamphlet reprint?) from "The scientific proceedings of the Royal Dublin Society" Vol.20 No.41, November 1933, pp597-656?
Nature magazine said "The mild, moist climate of Ireland is particularly favourable to the
growth of trees, and Mr. H. M. Fitzpatrick has done a valuable service
to both foresters and botanists in gathering together (Sci. Proc. Roy. Dublin Soc.
941, November 1933) particulars of the trees introduced into Ireland,
and as to where specimens of these trees may be found. Statistics of
tree dimension have been collected from no less than seventy-two
estates. The wide variety in conifers is particularly striking in the
list. Mr. Fitzpatrick states that broad-leaved trees have been less and
less in fashion since the introduction, about 1840, of many of the North
American conifers, which flourish so remarkably in the Irish climate."
Joyce managed to squeeze 67 cites into four clusters: p100, 159-160, 235, 246. He picks out random words that tickle his fancy:
'Liquidamber... exotics... Balsam Poplars... Parteen-a-lax... limestone... Abies magnifica... Noble Fir' →
100: "(you may have seen some liquidamber exude exotic from a balsam poplar at Parteen-a-lax, Limestone Road, and cried: Abies Magnifica! not, noble fir?)"
'exposed situations... Umbrella Pine... shelter belts... True Service... clean bole... Weeping Beech... PICEA... TILIA... wild state... Cricket-bat Willow... nurseryman... genus... Butternut... Sweet Gum... Manna Ash... Red Cedar... hawthorn... Curraghchase... Plane... Lodgepole... introduced... pineta... vernirubens... Deodar... pure stands... habitat... self-sown seedlings... species... largest individuals... elevation... Conna Hill... False Acacia... Common Sallow... is tender... POPULUS... Hickory... Arbor vitae... roadside... Alder... Whitebeam... Oak' →
159-160: "(The meeting of mahoganies, be the waves, rementions me that this exposed sight though it pines for an umbrella of its own and needs a shelter belt of the true service sort to keep its boles clean—the weeping beeches, Picea and Tillia, are in a wild state about it—ought to be classified, as Cricketbutt Willowm and his two nurserymen advisers suggested, under genus Inexhaustible when we refloat upon all the butternut, sweet gum and manna ash redcedera which is so purvulent there as if there was howthorns in Curraghchasa which ought to look as plane as a lodgepole to anybody until we are introduced to that pinetacotta of Verney Rubens where the deodarty is pinctured for us in a pure stand, which we do not doubt he has a habitat of doing, but without those selfsown seedlings which are a species of proof that the largest individual can occur at or in an olivetion such as East Conna Hillock where it mixes with foolth accacians and common sallies and is tender. Vux populus, as we say in hickoryhockery, and I wish we had some more glasses of arbor vitae. Why root by the roadside or awn over alum pot? Alderman Whitebeam is oaky-o.)"
'timber tree... Lucombe Oak... Turkish Hazel... Greek Fir... Incense... hypsometer... Mount Anville... died out... Athrotaxis... LARIX... Yew... Thuja... Wych Elm... Ranelagh... flourishing... in the open... native... seed in quantity was sent by Fortune' →
235: "...nab what's nicest and boskiest of timber trees in the nebohood. Oncaill's plot. Luccombe oaks, Turkish hazels, Greek firs, incense palms, edcedras. The hypsometers of Mount Anville is held to be dying out of arthataxis but, praise send Larix U'Thule, the wych elm of Manelagh is still flourishing in the open because it's native of our nature and the seeds was sent by Fortune."
'Horse-chestnuts... Coulter' →
246: "chastenot coulter"