KSIĄŻKI POWIĄZANE ZE SŁOWEM «PTYXIS»
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1
Pteridophytes and Gymnosperms
Fronds decompound, by pinnate (or sometimes dichotomous at the end)
branching of the rachis, circinate in longitudinal ptyxis: horizontal ptyxis involute;
pinnae and pinnules not articulate; pinnae with circinate ptyxis: pinnules flat,
several to ...
K.U. Kramer, Klaus Kubitzki, P.S. Green,
1990
2
Flowering Plants. Monocotyledons: Alismatanae and ...
Tinantia Scheidw. in Otto and Dietrich, Allg. Gartenz. 7: 365 (1839). Annuals
herbs; ptyxis involute; inflorescences paniculiform or umbelliform thyrses or
composed of 1-2 cincinni; cincinni elongate; flowers zygomorphic; sepals free;
petals free, ...
Klaus Kubitzki, H. Huber,
1998
It may be further classified as transverse, longitudinal, twisting/ bending posture,
or ptyxis/vernation. Transverse posture is the placement of the tip (distal end) of
an object with respect to a starting plane. Transverse posture terms are recurved,
...
4
American journal of botany
Ptyxis — As mentioned earlier, descriptions of ptyxis of cycad leaves and leaflets
have been poorly investigated and subject to some criticism by Johnson (1959).
With some variation in degree, there are essentially four types of ptyxis (Table 1)
...
5
A. K. Ghosh Commemoration Volume. Proceedings of the ...
Leaf sheath petrified, monocotyledonous; leaves in acropetal succession,
conduplicate ptyxis and equitant vernation. A pair of short cells in the costal
region of abaxial epidermis, mesophyll undifi'erentiated with air chambers.
Vascular bundle ...
Sharma A. K., Mitra G. C., Banerjee M. (editors)
6
The Families of the Monocotyledons: Structure, Evolution, ...
Ptyxis is a term that refers to the folding or rolling of individual leaves in the bud
stage. Types of ptyxis in monocotyledons are the conduplicate, conduplicate-
plicate, plicate, involute, supervolute, and explicative. (Ptyxis is sometimes
included ...
Harold Trevor Clifford, Peter Yeo,
1985
7
Gymnosperm (naked seeds plant) : structure and development
Leaves: Pinnate, longitudinal ptyxis involute, horizontal ptyxis involute. Leaflets
with circinate ptyxis and often terminal leaflet, lower leaflets not reduced to spines
. Petioles lacking spines or prickles. Leaflets flat, penniveined, with a large midrib
...
8
The monocotyledons: a comparative study
Types of ptyxis. All the leaves are shown in transverse section except one (I)
shown in longitudinal section A: flat*; B: curved*; C: conduplicate*; D:
conduplicate-plicate*; E: involute*; F: super- volute*; G: revolute; H; plicate*; I:
circinate; J; ...
Rolf Dahlgren, Harold Trevor Clifford,
1982
9
The European Garden Flora Flowering Plants: A Manual for the ...
Leaves alternate but in false whorls, deciduous, exstipulate; ptyxis conduplicate.
Flowers bisexual, actinomorphic, in the leaf-axils. Perianth absent. Stamens
many, hypogynous. Ovary of 6–many, free, stalked carpels; ovules 1–3 per carpel
, ...
James Cullen, Sabina G. Knees, H. Suzanne Cubey,
2011
10
The Molecular Organography of Plants
It is often combined with conduplicate ptyxis of the lamina. Conduplicate ptyxis is
probably the commonest type. In this the two halves of the lamina are folded up
along the midrib, rather in the manner of a closed book, with the adaxial side ...