Upon this current conception ofvarietal evolution rests the whole evolution hypothesis.
The varietal distinction maintained seems a small one, but it is constant and striking, so far as can be discovered.
The species and varieties are indicated only by their specific or varietal names in the following key, and the numbers refer to the serial numbers of the synoptical presentation.
Engelmann merges this variety with the species, and has been followed in this by subsequent writers, but the characters seem so (distinctive that its varietal rank has been restored.
With very rare exceptions, also, varietal forms are contemporaneous with the normal form of their specific type, and occur in the same localities.
The writer prefers not to apply the varietal name to the forms of our area.
In most instances when the bloom is rubbed from the twigs they show a purple tinge, hence the varietal name.
Hence, the eventually emerging constant or specific type is the resultant of all the transitory or varietal types, when these have been fused together by intercrossing.
Hence, if cross-infertility has thus usually been a necessary condition to a varietal divergence becoming specific, it can make no material difference when the incipient infertility arose.
Where varietal divergence has begun in the absence of cross-infertility, such divergence seems, as a general rule, to have been incapable of attaining to a specific value.
Montis occurs in Arizona and Colorado, and by some writers is regarded as a varietal form of antonia, in which opinion they may be correct.
Naturalists have therefore distinguished the Asiatic from the European form by giving the former what is known as a varietal name.
This species occurs in Utah and Idaho, and is possibly a varietal form of A.
The butterfly is somewhat variable, and a number of varietal forms have been described.
Specimens connecting the typical with the varietal form are in my possession.
Closely allied to the preceding species, of which it may be only a smaller varietal form.
Three forms occur within the limits of the United States, which have by some authors been reckoned as distinct species, and by others are regarded merely as varietal forms.
The insect is very variable in the markings both of the upper and under sides, and several so-called species are only varietal forms of this.
I possess a singular varietal form or aberration from Arizona, in which the black spot on the upper side of the primaries fills the outer half of the cell.
This is a protean species, a dozen or more well-marked varietal forms being produced, many of them from a single batch of eggs.
The species mimicked is Danais chrysippus, of which at least three varietalforms or local races are known.
This genus includes numerous species which are more or less subject tovarietal modifications.
These are well known and have often been described, but some of the varietal forms need further study.
The peach acquires distinct varietal characters in every great geographical region in which it is grown.
All peaches come in bearing so early and bear so regularly thatvarietal differences in these characters scarcely count in classifying, but productiveness varies very characteristically in different varieties.
Slate's plantings of ~Corylus~ at Geneva, we may get more information on varietal preferences.
Injury by insects will vary from year to year, due to various causes, and insects frequently show varietal host preferences.
Recently Schima[17] has given a careful and detailed account of all the forms found in Lower Austria which he enumerates under 14 distinct varietal names.
It would be interesting and profitable to attempt in a long series of Ruffs to determine the Mendelian factors which by their combinations give rise to this complex assemblage of varietal forms.
It is to this group of cherries that Linnaeus gave the varietal name Juliana and De Candolle the specific name Cerasus Juliana.
But with either of the two species there are great variations in the susceptibility of the varietal hosts--a matter specially noted in a later chapter in the discussion of varieties.
Chicagoensis, and may be regarded as a varietal form.
When we inquire what constitutes a good species for any given period, we have reason to believe that many names in our lists represent merely varietal forms or erroneous determinations.
These facts have naturally been made the occasion of speculations as to the spontaneous development of plants by processes of varietal derivation.
In this way such plants as Arthrostigma and Psilophyton may have assumed new varietal forms.
The Floridian form has received the varietal name of /mortoni/.
It is still quite commonly found in varietal vineyards and is listed by a few grape nurserymen.
Jessica has been quite thoroughly tested in different parts of the United States but has never become popular and is to be found only in varietal vineyards.
It is very similar to the several other white seedlings of Concord, all of which have a decided varietal resemblance and which, except in color of fruit, have the general characters of Concord.
It is still to be found in manyvarietal vineyards but is now offered for sale by but few nurserymen.
It is very common in varietalvineyards but it has not become popular as a commercial sort; it is a popular grape for exhibitions where, when well grown, it is hardly surpassed in appearance by any other American grape.
At one time it was considerably planted in Missouri as a wine grape but it did not become popular nor spread from varietal vineyards to any extent on account of its lack of quality for either the table or wine.
Excelsior is to-day rather rare in varietal vineyards and is apparently not offered for sale by any nurserymen.
It has been gradually dropped from cultivation although it is still to be found in many varietal vineyards and is listed for sale by an occasional nurseryman.
On this account the French growers selected the more vigorous forms of the Riparias sent them to which they gave varietal names, as Riparia Gloire, Riparia Grand Glabre, Riparia Scribner, Riparia Martin and others.
It is still to be found in all varietal vineyards, in occasional commercial plantings and somewhat commonly in gardens.
Although the Aminia is found in many varietal vineyards, an examination of over forty of the leading grape nurserymen's catalogs shows only three who offer vines for sale.
It is still widely cultivated in varietal vineyards.
It was introduced about 1880 and has been rather widely tested but has never been popular, and is now seldom seen in varietal vineyards.
The variety is widely distributed in varietal vineyards.
Varieties: I've noticed no special varietal differences in ability to tolerate dryish soil.
The key to enjoying kale as a salad component is varietal choice, preparation, and using the right parts of the plant.
Of course there is a considerable varietal variation within each species.
The Grafted Tree The first varietal selections were made in 1930.
Potential Varieties Other varietal selection are being made, mainly by the Bureau of Plant Industry, Soils, and Agricultural Engineering from trees at its various field stations.
Thus the great varietal divisions, though undergoing slow changes from age to age, continued, like all other zoological groups, to maintain a distinct regional character.
Many varieties are found, however, and varietal names are used for such products.
Many varietal names are attached to the product of single factories or factory groups.
So much of the product has reached the consumer without characteristic varietal flavor that large numbers have acquired the habit of purchasing and even preferring cheese only partly ripe.
Among the varietal names for Neufchatel cheese from whole milk or with added cream are Petits Bondons, Malakoffs, Carres affines.
As with the butternut, there are no varieties of the black walnut in cultivation; at least, none propagated by means which will insure the perpetuation of their varietal characteristics.
It would certainly be a pity to have such a remarkable nut lost to the world, because if propagated by grafting or by any other mode to insure perpetuating its varietal characteristics, its value could scarcely be estimated.
Some of the wild varieties have received local names, and a very few propagated by grafting, which is probably the most practical means known of multiplying them, and at the same time preserving their varietal characteristics.
With varietal forms of Coniferae that will not come true from seed or that cannot be struck as cuttings, grafting must be resorted to, and if young plants of the type species are used as stocks the results will be fairly satisfactory.
The varietal problem with pecans will be ever with us, as long as varieties are found in the wilds and as long as people continue to plant seedlings in different localities.
In horticultural practice a plant is not regarded as acquiring varietal status until it becomes distinctive among seedlings, because of superiority of product, unusual history, or other similar reason.
Suppose, then, a variety to arise which is perfectly fertile within the limits of the varietal form, but imperfectly fertile or infertile with the parent species.
As before noticed, the degree of divergence is, roughly speaking, directly as the distance the varietal forms are apart.
For, if this factor were powerful, it would override the effects of experimental combination of characters when the conditions were similar, and would give rise to well-marked varietal forms when the conditions were diverse.
And since the parental cells are subject to modification, transmitted through the gemmules to the reproductive elements, it is clear that there is abundant room and opportunity for varietal combinations.
It has been said that different markets have special varietal preferences, paying a better price for these than do other markets for the same quality.
As with wheat and corn, improved varietal types and stricter control over the uniformity of the seed greatly aided the cultivator.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "varietal" in a variety of sentences. We hope that you will now be able to make sentences using this word.
