Lamina (algae)

{{short description|Macroscopic algae}}

File:Kelp. (15272102411).jpg laminae]]

The lamina or blade in macroscopic algae, like seaweed, is a generally flattened structure that typically forms the principal bulk of the thallus.{{Cite web |title=Sri Lankan Seaweeds: Methodologies and Field Guide to the Dominant Species |url=https://www.nhbs.com/sri-lankan-seaweeds-book |archive-url= |access-date=2024-11-02 |website=NHBS |publisher=Abc Taxa |page=233 |language=en}} It is often developed into specialised organs such as flotation bladders and reproductive organs.{{Citation needed|date=November 2024}}

The lamina is typically an expansion of the stipe which in term is attached to the substrate by the holdfast.{{Cite book |last=Hurd |first=Catriona L. |title=Seaweed ecology and physiology |last2=Harrison |first2=Paul J. |last3=Bischof |first3=Kai |last4=Lobban |first4=Christopher S. |date=2014 |publisher=Cambridge University Press |isbn=978-0-521-14595-4 |edition=2nd |location=Cambridge; New York}}