Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Jan 13;11:849. doi: 10.1038/s41598-020-79163-8

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Floral organs of pineapple and floral diagrams of pineapple, rice, and the ancestral monocot. (A) Inflorescence of pineapple. Dense pineapple flowers are arranged in a spiral at the periphery of the spadix rachis. Each flower comprises sepals, petals, stamens, and pistils and is protected by one thick bract. (B) Floral diagrams of pineapple, rice, and the proposed ancestral monocot. Individual pineapple flowers are trimerous with three sepals (green) and petals (purple) in the two outer whorls, six stamens arranged in two whorls with three organs in each, and one pistil with three fused carpels in the center. In rice, there are two outer perianth organs (green, adaxial palea and abaxial lemma); two lodicules (red) internal to the lemma, corresponding to petals in non-grasses; six stamens in one whorl; and a single carpel. The floral structure of the ancestral monocot is similar to that of pineapple, except for the two outer whorls of perianth organs. se sepal, pe petal, sta stamen, pa palea, le lemma, lo lodicule, ca carpel.