Abstract
Bulb stem anatomy is examined in Iris bucharica and seven species of the tribe Tigridieae with particular reference to primary thickening growth. Differences between the two groups, particularly in stem shape and root distribution, indicate that the bulbous habit evolved twice in Iridaceae. The primary thickening meristem (PTM) in Tigridieae differs from that of other bulbous monocotyledons, such as Allium, in that it is not horizontally oriented and generally produces fewer derivatives, although it contributes substantially both to root production and to stem vasculature in the outer region of the central vascular cylinder.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
