decussate


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decussate

[′dek·ə‚sāt]
(botany)
Of the arrangement of leaves, occurring in alternating pairs at right angles.
(science and technology)
To intersect in the form of an X.
References in periodicals archive ?
thesauri has much deeper whorls, a higher spire, narrower umbilicus, irregular scale-like subsutural pliculae and lacks the finely decussate microsculpture of T.
Opposite decussate leaves; glauco-pruinose, specially in the adaxial face, varying in size and shape; ovate blade (or ovate-lanceolate, ovate-elliptic, ovate-oblong, ellipticoblong, (4-) 5.
Type species: Pseudosubulina (Rectaxis) decussate Baker, 1926 (venezuela).
The presence of three decussate whorls of 2 stamens in Siparuna, each whorl with 2 opposite stamens is reported for the first time.
These tracts decussate (except for the anterior tract) in the lower medulla before entering the spinal cord.
2008 Commelinaceae Tradescantia virginiana Tiwari & Gunning, 1986c (b) Fabaceae Acacia conferta Kenrick & Knox, 1979 Acacia iteaphylla " Acacia subalata " Fagaceae Qnercus robur Rowley & Gabarayeva, 2004 Gentianaceae Canscora decussate (b) Vinckier & Smets, 2003 Gentiana acaulis Lombardo & Carraro, 1976 Swertia perennis (b) Vinckier & Smets, 2003 Lauraceae Persea palustris (b) Furness & Rudall, 2001a Malvaceae A but i Ion pic turn Strittmatter et al.
Leaf simple opposite, decussate, cauline, exstipulate, petiole short, flattened, glabrous, pulvinous to sheathing base Flower bisexual, typically zygomorphic, complete, erect, sessile, hypogynous.
Scutellar posterior pair of bristles not decussate.
A remarkable maize mutant, aberrant phyllotaxy1 (abph1) displays a decussate phyllotactic pattern (leaves are paired at 180[degrees] and the following leaf pair develops at a 90[degrees] angle) while wild type maize develops as distichous (alternating leaf initiation) plants.
for instance, shows 30% decussate and 70% tetrahedral tetrads in the same specimen; a single rhomboidal uniplanar tetrad has