Abstract Detail

Paleobotanical Section

Bryan, Finley [1], Pigg, Kathleen [2], Devore, Melanie [3].

Vivipary in the fossil record: a case in the Eocene Republic flora.

Curious structures initially interpreted as floral or inflorescence remains are described from the latest early Eocene Republic flora of northeastern Washington State. Structures consist of an elongate, striate axis terminating in an apical, ovoid to spherical structure 1.0 - 1.4 cm long and 0.8 - 1.0 cm wide. Appearing to be attached directly to the ovoid structure are flowerlike appendages borne on striated stalks or pedicels, however, dégagement fails to reveal any internal floral parts in the appendages. Futher study demonstrates that the appendages are helically produced from the shoot apex and that sometimes smaller ovoid structres are found within the shoot system. The organization of the fossil remains closely resembles that of certain bulb-forming monocots, in particular among the onions. For example, Allium x proliferum. the so-called Tree Onion or Egyptian Walking Onion, bears vegetative bulbils at the base of its inflorescence, suggesting a model for the plant habit of the Republic fossils. We suggest these interesting fossils demonstrate that plants with bulbils were present in the Republic flora, suggesting a means for vegetative reproduction in plants of the latest early Eocene landscape.

Broader Impacts:

1 - Fayetteville State University, Department of Biology, 1200 Murchison Rd, Fayetteville, NC, 28301, USA
2 - Arizona State University, SCHOOL OF LIFE SCIENCES FACULTY & ADMIN, BOX 874501, Tempe, AZ, 85287-4501, USA, 480/965-3154
3 - Dept of Biology & Env. Science, GC & SU Campus Box 81, MILLEDGEVILLE, GA, 31061-0001, USA

Keywords:
vivipary
Eocene
Okanogan Highlands
Republic flora
Egyptian walking onion
bulbil.

Presentation Type: Oral Paper:Papers for Sections
Session: 44
Location: Prince of Wales/Riverside Hilton
Date: Wednesday, July 31st, 2013
Time: 2:15 PM
Number: 44004
Abstract ID:458
Candidate for Awards:None