Phyllotaxis - Wikipedia, the free encyclopedia
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In botany, phyllotaxis or phyllotaxy is the arrangement of the leaves on the stem of a plant. The basic patterns are alternate , opposite , whorled or spiral . With an alternate pattern, l...
en.wikipedia.org/wiki/Phyllotaxis
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Most commonly they are either in pairs, opposite oneanother on the stem, or they are produced singly in an alternate arrangement. ... The right hand picture is Acalypha hispida, Red-hot cat tail, which has an alternate leaf arrangement.
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www.horticulturist.com/mastermag5/plantform.html
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To the left: Lonicera imlexa (Honeysuckle, Caprifoliaceae): Each pair of opposite leaves is arranged at an angle of 90 degrees to the preceding one. This is also called a decussate arrangement. The leaves are sessile, the leaf blades are broad and oval with pointed apexes.
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www.biologie.uni-hamburg.de/b-online/e02/gegen.htm
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Their pattern, also called leaf venation, is a feature of characterization. Leaves may be simple, i.e. undivided or compound (composed of several parts called leaflets). The blade margin and the leaf arrangement at the stem are further features of characterization.
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www.biologie.uni-hamburg.de/b-online/e02/02c.htm
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Leaf Arrangement: Opposite; Click on the image for a larger view of the photo. Click on the name for detailed information on the plant. ... Arrangement Along Stem:; Opposite leaves may appear in either a distichous or decussate arrangement. ... Botanical Terminology > Leaf Arrangement > Opposite...
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plants.nres.uiuc.edu/arrangement/arr-opposite.html
plants.nres.uiuc.edu/arrangement/arr-opposite.html
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So far you have made the following choices... ... Let's narrow our choices based on leaf arrangement. ... My leaves are arranged opposite each other, in pairs or in threes.
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www.fw.vt.edu/dendro/dendrology/syllabus/key/hardwood.h...
www.fw.vt.edu/dendro/dendrology/syllabus/key/hardwood.htm
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Abelia xgrandiflora - glossy abelia ... Cornus alternifolia - alternate-leaf dogwood ... Prunus cerasifera - purple leaf plum...
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www.cnr.vt.edu/dendro/dendrology/syllabus/key/hardwood....
www.cnr.vt.edu/dendro/dendrology/syllabus/key/hardwood.cfm
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Leaf Arrangement: Alternate, Opposite, Whorled ... Very simply, if there is one leaf attached along a stem, with no other leaf at that site, we can refer to this as alternate arrangement. If there are two leaves at each site, the arrangement is opposite. Whorled arrangement means that more than two leaves are attached at...
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www.horton.ednet.ns.ca/staff/Richards/Biology/PlantPage...
www.horton.ednet.ns.ca/staff/Richards/Biology/PlantPages/Fall%20Foliage%20Leaf%20Arrangement.htm
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Opposite Leaves--Big Periwinkle...
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generalhorticulture.tamu.edu/h202/labs/lab2/leafm-links...
generalhorticulture.tamu.edu/h202/labs/lab2/leafm-links/opposite-leaf.html
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