Fraxinus cf. honshuensis TANAI et ONOE, 1961

Wu, Meng-Xiao, Huang, Jian, Su, Tao, Zhou, Zhe-Kun & Xing, Yao-Wu, 2021, Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications, Fossil Imprint 77 (2), pp. 287-298 : 290

Fraxinus cf. honshuensis TANAI et ONOE, 1961

Text-fig. 3f–k, n, o

S p e c i m e n s c h e c k e d. XTBGPC-LH2-0111 (Textfig. 3f, g), XTBGPC–LH1–0578 ( Text-fig. 3i, j ).

D e s c r i p t i o n. Fruits samaras, long obovate, symmetric, 21 mm long and 3–4 mm wide at the broadest point ( Text-fig. 3f–k ), length to width ratio 6: 1. Pedicel short and 1.0 mm long. Calyx hypogynous, persistent, campanulate, cupping base of fruit body. Two calyx teeth fused at base, apices acute, 1.0 mm long and 0.5 mm wide ( Text-fig. 3n, o ). Fruit body flattened in the plane of the wing. Wing decurrent, flattened, entire margin, attached to the apex of fruit body and clasping its lateral margin nearly to base, widest at the apical half of fruit. Wing apex symmetric or extension asymmetric, emarginate or rounded ( Text-fig. 3f–k ). Stigmas or stylar remnant not visible, 9–11 veins visible parallel to the long axis of the fruit, central vein thick ( Text-fig. 3h, k ), extending from the fruit base to its apex. One seed located in the base of fruit, spindle, symmetric, 7–8 mm long and 2 mm wide, the ratio of fruit length to seed length 2.6, base and apex acuminate; long axis parallel to long axis of fruit ( Text-fig. 3h, k ).

Figures

Text-fig. 3. Fossil fruits of Fraxinus: photos and drawings. a–e: F. zlatkoi MENG-XIOA WU et J.HUANG sp. nov., a–c – the holotype image and its line drawing (XTBG-PC-LH3-0341), d, e – paratype image and its line drawing (XTBGPC-LH3-1138); f–k: Fraxinus cf. honshuensis TANAI et ONOE, f–h – XTBG-PC-LH2-0111, i–k – XTBG-PC-LH1-0578; l, m: enlargement of (b) and its line drawing; n, o: enlargement of (g) and its line drawing. Arrows in (i) and (n) refer to the calyxes. Scale bars = 5 mm for a–k, scale bars = 1 mm for i–o.