ph: ph: The measure of alkalinity or acidity on a 14-point scale. A pH of 7.0 is neutral. pH
alkalinity. The ideal pH for rose gardens is 6.5 (slightly acidic).
Pistil: The female organ of a flower, comprised of the stigma, style and ovary.
Pollen: The yellow, dust-lie male cells produced by another flower.
Pollen parent: The source of pollen for a hybrid rose.
Polyantha: A class of roses by Jean Baptiste Guillot from crosses between climbing varieties of R.
Multiflora and the repeat-flowering China Old Blush. Polyanthas present their delicate flowers in
sprays well above there foliage.
Portland: An old class of roses that became popular after 18700 largely because of its ability to
bloom repeatedly, a rare trait among European roses at the item. They have fragrant blooms on
straight stems directly atop their foliage.
Pruners: An essential tool for the Rosarians. The best design is the Bypass Pruner which has two
blades that cut like scissors. The Anvil Pruner uses a flat plate to push the cane against a single
blade, which often results in crushed canes.
Quartered Rose: A rose form in which the petals appear to be pinched into four quarters.
Rambler: A climbing rose, generally of multiflora origin, that presents clusters of small blooms on
long, slender canes.
Root stock: A variety whose vigorous roots are used as the foundation for a budded rose. The use
of rootstock's allows varieties that would not grow on their own roots to be propagated
commercially.
Rugosa: Derivatives of the hardy Japanese species, R. Rugosa, that are recognized for their deeply
veined leaves
Rust: A fungal disease that is recognized by orange-red patches on leaves.
Seed Parent: The female parent of a hybrid rose that receives the pollen.
Semi-Double Rose: A rose form of 12 to 24 petals.
Shank: The straight portion of rose bush between the canes and roots.
Shrub rose: Any rose that presents its blooms close to the foliage and is well suited for unattended
use in the landscape.
Single Rose: A rose comprised of a single ring of petals, generally numbering 5 to 12 petals.
Shade Rose: The Roses need 6 or more hours of sun, but some roses are tolerant of shade but this
means open shade.
Shovel-prune: After heaping abundant patience on an unsatisfactory rose, the means by which one
renders a final opinion of it s performance. Removing the rose bush to be replaced by another.
Species Rose: A native (wild) rose that will reproduce tre from seed. Species roses will start with
the name Rosa followed by a word. Only a few hundred species roses exist.
Sport: A spontaneous mutation that generates a new rose. Climbing roses are sports of bush roses.
Other common sports include changes in color and petal count. Some sports are stable to start a
new rose.
Spray (aka: inflorescence): The presentation of blooms in clusters that originate at a single stem.
Spreader-sticker: An additive for sprays that increases their effectiveness by enabling the drops to
flow more evenly across the foliage and to stay in place.
Stamon: The male portion of a flower's reproductive system, comprised of a filament that holds
the pollen.
Stigma: The female portion of the flower that receives pollen grains for fertilization.
Sweat-out: A technique used to encourage stubborn bushes out of dormancy by placing a plastic
bag around the canes. The effect is to create a miniature greenhouse that holds in moisture and
warmth.
Substance: The amount of starch in the cells of a rose petal; roses with more substance will last
longer in the vase.
Sucker: Stems that grow spontaneously from the roots of a budded or own-root rose, generally in
an unwanted manner. If left in place, the rose you are growing will die due to sucker plant is
rootstock taking over the roots.
Tree Rose: A garden specimen created by budding a rose atop a stem of 36" to 48".
Weeping Tree: A tree rose comprised of a 48" to 96" stem grafted to a head of a rose with a lax
habit. The result is that the long canes cascade outward and down.
Wild Rose: Synonym for Species Rose.
Winterize: The protection of one's garden from winter dehydration and late spring frosts by the
use of heavy mulch, rose cones, etc
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