Thanks for the advice and suggestions, guys. I did a little research and found out that the Nganasan people of North Russia made bows from larch roots.
From Marcus Lepola in "Arctic Bowyery":
There is also a single odd bow type that was used by the central Siberian Nganasans. Their composite bow was made of a several pieces of resinous strips of larch root that were glued together with codfish glue and wrapped with birch bark. A string bridge was also added to the bow. A bowstring of thong was fastened to the outer curve of the bow, a feature which also distinguished the Nganasan bow from bows used by neighbouring peoples. (Popov 1966: 22–24)
Another quote (in german) posted by Martti Kujansu on a different forum:
Der Bogen der Taimyrsamojeden schien auf den ersten Blick außerordentlich einfach; trotzdem gehörte doch erfahrene Kunstfertigkeit dazu, ihn herzustellen. Das Holz harziger Wurzeln der hochnordischen Lärche mußte das Material dazu liefern. War dieses Holz zweckentsprechend zugerichtet, wurde es mit Hilfe von Quappenleim mit Birkenhorke zierlich überklebt und dadurch teils gefestigt, teils vor Durchnässen geschützt. Die erfahrungsgemäß scwächsten Stellen der Wölbung kräftigte man durch vervielfachte Umwicklung mit Birkenborke. Schließlich verlieh ein Steg an jedem Ende größere Elastizität sowie auch die richtige Verteilung der Anspannung auf die einzelnen Abschnitte. Der Bogen wurde nämlich nicht, wie Laien vorauszusetzen geneigt sind, nach der Richtung seiner konkaven Seite, sondern zur konvexen hin gespannt
Google translation to English
The arch of the Taimyrsamoyeden seemed at first sight extremely simple; nevertheless an experienced craftsmanship was necessary to make him. The wood of resinous roots of the high-lord's larch had to supply the material. If this wood had been appropriately dressed, it was adorned with birch pork, with the aid of burbot glue, and thus partly solidified, partly protected from being soaked. The areas of the curvature, which had the best experience, were strengthened by multiplied wrapping with birch birch. Finally, a web at each end gave greater elasticity as well as the correct distribution of the tension on the individual sections. The bow was not inclined, as laymen were inclined, to the direction of its concave side, but to the convex side
