Diverse Fruits And Seeds Of The Mid-Eocene Kishenehn Formation, Northwestern Montana, Usa, And Their Implications For Biogeography Smith, MacKenzie A. Greenwalt, Dale E. Manchester, Steven R. Fossil Imprint 2023 2023-11-07 79 1 37 88 [357,459,1567,1591] Pinopsida Pinaceae Pinus Plantae Pinales 9 46 Tracheophyta species undetermined  M a t e r i a l. USNM PAL 621980, 622300. L o c a l i t y. Disbrow Creek. D e s c r i p t i o n. Winged seed linear, incomplete; 10.4– 14.1 mmlong, 4.4–5.0 mm wide at widest point; seed body on proximal side, obovate to elliptical, slightly detached from wing, distally rounded 2.2–3.2 mmlong and 1.3– 1.5 mmwide; admedial edge of wing begins a third of the way up the seed body and rapidly becomes larger at the end of the seed body’s distal end; medial edge of wing straight to slightly concave; striations on wing slightly undulating, striations of similar thickness. R e m a r k s.  Pinussubg. Strobus(also known as   Haploxylon, the soft pines or white pines) have seed bodies that can disarticulate, such that the fossil seeds of this subgenus are often missing the seed body. This fossil falls into Wolfe and Schorn’s (1990)circumscription of atypical  Pinus4.