orthostichy

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orthostichy

(ɔːˈθɒstɪkɪ)
n, pl -chies
1. (Botany) an imaginary vertical line that connects a row of leaves on a stem
2. (Botany) an arrangement of leaves so connected
[C19: from ortho- + Greek stikhos line]
orˈthostichous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
In the inflorescence of some species of Cyperus (Guarise & Vegetti, 2007), the formation of more than three orthostichies can be observed.
These 20 species include Attalea maripa, which has leaves arranged in five vertical ranks or orthostichies, corresponding to a 2/5 phyllotactic fraction, while most other species of Attalea sensu lato and Cocoseae in general have a 3/8 fraction.