ETYMOLOGY OF THE WORD PARASTICHY
From para-1 + Greek stikhia, from stikhos row, rank.
10 ENGLISH BOOKS RELATING TO «PARASTICHY»
Discover the use of
parastichy in the following bibliographical selection. Books relating to
parastichy and brief extracts from same to provide context of its use in English literature.
1
Handbook of Plant Science
One sample of each recognizable parastichy set is marked with a different colour:
1 3 (green) and 21 (blue) are the most conspicuous contact parastichy sets. Less
obvious are parastichy sets along which the leaves have (nearly) no contact: 8 ...
2
Phyllotaxis: A Systemic Study in Plant Morphogenesis
Because they wind in the opposite direction with respect to the 13 spirals
previously observed in the outer region and which are extended in the inner
region, the pair (8, 13) is another visible opposed parastichy pair in the outer
portion of the ...
3
Alan Turing: His Work and Impact: His Work and Impact
A parastichy is thus the totality of leaves obtained by repeatedly applying the
same congruence to some one leaf. Thus if a leaf has coordinates (θ0,z0) and [θ,
z] is a congruence, then the leaves with coordinates (θ0 +nθ,z0 +nz) form a ...
S. Barry Cooper, J. van Leeuwen, 2013
4
Community Ecology of a Coral Cay: A Study of One-Tree ...
At the time of initial marking of the leaves on the ten trees only two parastichies
had all the leaves live and green, seven had one leaf of the parastichy dead (
usually the bottom one, but sometimes the one next to the bottom), and one had
four ...
5
An Introduction to Plant Structure and Development: Plant ...
A line connecting the primordia in the generative spiral is called a parastichy.
Infact thistermisappliedtoanyhelicallineconnectingleaf primordia.Iftheprimordiain
ahelicalseriesarein physical contactina bud the parastichy is referred to as a
contact ...
6
The Growth and Functioning of Leaves: Proceedings of a ...
If this equation is taken to represent the 1-parastichy, two successive lattice
points along it, (r0,q>0) and (r,,q>j) are related by the dilatation factor, r0/rx. This
will be symbolized a, and will be taken to be greater than one, in agreement with
the ...
John Egerton Dale, Frederick Leon Milthorpe, 1983
7
CGAL Arrangements and Their Applications: A Step-by-Step Guide
The numbers of parastichies in the two sets of a parastichy pair are consecutive
Fibonacci numbers. The number of parastichies decreases towards the center.
For more details see, e.g., [48,122]. If you look carefully at the sunflower
capitulum ...
Efi Fogel, Dan Halperin, Ron Wein, 2012
8
Analysis of Growth and Development of Xanthium
Generative spiral is described by an imaginary spiral that passes through all
leaves in order of their appearance, from the base in the acropetal direction.
Parastichy is described by an imaginary spiral or segment of it that passes
through a ...
Roman Maksymowych, James O. Brooks, Frank B. Salisbury, 1990
9
The Shoot Apex and Leaf Growth: A Study in Quantitative Biology
Phyllotaxis Fig. 4.3.4 presents a transverse projection of this same 22-day apex
together with contact parastichy spirals superimposed on the same outlines. The
genetic spiral is still very much a contact one; there are two prominent clockwise
...
10
Mathematics in Nature: Modeling Patterns in the Natural World
During growth of the plant (according to Alan Turing) various such parastichy
numbers come into prominence at different stages. An increasing number of
florets is needed to pack around the growing circumference as the growth rate of
the ...
