ERA

Download the full-sized PDF of Seeds and Embryos of Araucaria mirabilis.Download the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3GH9BM2Z

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Biological Sciences, Department of

Collections

This file is in the following collections:

Journal Articles (Biological Sciences)

Seeds and Embryos of Araucaria mirabilis. Open Access

Descriptions

Author or creator
Stockey, R.A.
Additional contributors
Subject/Keyword
seeds
Cerro Cuadrado petrified forest
Araucaria
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Seeds and embryos contained within the silicified ovuliferous cone Araucaria mirabilis from the Cerro Cuadrado petrified forest are described. One wingless seed, 0.8-1.3 cm in length and 0.2-0.6 cm in width, is embedded in each ovuliferous scale. Seeds show a three-layered integument and a prominent wavy nucellus which is attached basally to the endotesta. The megagametophyte contains cellular inclusions that may represent starch grains. Ovule vascu- larization is complex and appears most similar to that of Araucaria bidwillii. Embryos 2 mm long and 0.25 mm wide appear to be in a telo-stage period of development. Shoot apex, cot- yledons, root meristem, and calyptroperiblem are present in the embryos in which vascular tissues and secretory elements were beginning to differentiate at the time of fossilization. Embryo ontogeny is considered in light of stages encountered in extant gynmosperm taxa. The absence of the microgametophyte phase in the Cerro Cuadrado collection is discussed.
Date created
1975
DOI
doi:10.7939/R3GH9BM2Z
License information
Rights
This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Stockey, R.A. (1975). Seeds and Embryos of Araucaria mirabilis. American Journal of Botany , Vol. 62, No. 8, 856-868
Source
Link to related item

File Details

Date Uploaded
Date Modified
2014-04-30T21:46:00.366+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 3790123
Last modified: 2015:10:12 20:16:45-06:00
Filename: AJOB_62_1975_856.pdf
Original checksum: 2746bfeb20bb949f69b3857dc46cfafd
Well formed: true
Valid: true
Status message: Outlines contain recursive references.
File title: Article Contents
File title: Seeds and Embryos of Araucaria mirabilis
Page count: 13
File language: en
Activity of users you follow
User Activity Date