Abstract Detail



Pteridology

Frangos, Samantha [1], Kanaley, Kathleen [2], Stevenson, Dennis [3].

Anatomy and morphology of Huperzia squarrosa.

The vascular anatomy of roots and stems is an actinostele with protoxylem of the lobes being composed of orthostichies of the pseudowhorled leaves that are in a secondary Fibonacci series.  The metaxylem is blocked out early but lignification is delayed as in other Lycopodiaceae. The leaves have marginal meristems that are basically ephemeral.  Major branching is isotomous.  However, when young shoots are detached, planted and rooted, new shoots arise from near the cut area.  The shoots are cryptic branches that are initiated as anisotomous branches, which remain dormant until the main axis is detached.  In rare instances, these cryptic branches grow out on an intact plant. In terms of initiation and dormancy, these cryptic branches are similar to the gemmae of Huperzia lucidula and H. selago.


1 - New York Botanical Garden, 2900 Southern Boulevard, Bronx, New York, 10458, USA
2 - Fordham University, Lincoln Center Campus, 113 West 60th Street, New York, NY, 10023, USA
3 - New York Botanical Garden, Science, 2900 Southern Boulevard, Bronx, NY, 10458, USA

Keywords:
Huperzia
anatomy
morphology
development.

Presentation Type: Oral Paper
Number:
Abstract ID:256
Candidate for Awards:None


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