Pingos can only form in a permafrost environment.

Pingos that form in bedrock can show similar deformation.

Pingos are common structures in permafrost regions.

Image: Pingos near Tuk. jpg | Pingos near Tuktoyaktuk, Northwest Territories.

Winter annuals typically grow low to the ground, where they are usually sheltered from the coldest nights by snow cover, and make use of warm periods in winter for growth when the snow melts.

For a girl in puberty, during thelarche ( the breast-development stage ), the female sex hormones ( principally estrogens ) promote the sprouting, growth, and development of the breasts, in the course of which, as mammary glands, they grow in size and volume, and usually rest on her chest ; these development stages of secondary sex characteristics ( breasts, pubic hair, etc.

The hop plant is a vigorous, climbing, herbaceous perennial, usually trained to grow up strings in a field called a hopfield, hop garden, or hop yard when grown commercially.

The shortest growing season is found at the northern taiga – tundra ecotone, where the northern taiga forest no longer can grow and the tundra dominates the landscape when the growing season is down to 50 – 70 days, and the 24-hr average of the warmest month of the year usually is 10 ° C or less.

Cotton strippers are used in regions where it is too windy to grow picker varieties of cotton, and usually after application of a chemical defoliant or the natural defoliation that occurs after a freeze.

Within the seed, there usually is a store of nutrients for the seedling that will grow from the embryo.

Banksia species that grow as shrubs are usually erect, but there are several species that are prostrate, with branches that grow on or below the soil.

Many begonias will grow and flower year-round except for tuberous begonias, which usually have a dormant period.

They usually grow in more or less pure stands.

Neurofibromatosis Type 2 ( NF-2 )-group of inherited disorders in which noncancerous tumors grow on several nerves that usually include the hearing nerve.

Rhubarb growth can be ' forced ' or encouraged to grow early by raising the local temperature, usually by placing an upturned bucket over the new shoots.

Making copra – removing the shell, breaking up, drying – is usually done where the coconut palms grow.

Dust devils are usually harmless, but can on rare occasions grow large enough to pose a threat to both people and property.

Brown recluse spiders are usually between 6 – 20 mm ( in and in ), but may grow larger.

Since they lived underground, Dwarves did not grow their own food supplies if they could help it, and usually obtained food through trade with Elves and Men.

Chestnut oak trees are generally not the best timber trees because they are usually branched low and not very straight, but when they grow in better conditions, they are valuable for timber, which is marketed as ' mixed white oak '.

In Rhododendron, a genus with many broadleaf evergreens, several species grow in mature forests but are usually found on highly acidic soil where the nutrients are less available to plants.

Thus, rather than being formed from a trained, armed, and organised army, the Republican armed forces began to grow in September from usually younger, less trained groups built around charismatic leaders.

These evergreen trees usually grow to around tall, although they can reach.

Short shoots have very short internodes ( so they may grow only one or two centimeters in several years ) and their leaves are usually unlobed.

They eventually grow to a length of 2 – 4 m and usually become split, frayed and shredded into several well-separated strap-shaped sections by the distortions of the woody portions surrounding the apical slit, and also by wind and adventitious external injuries ..

Taller cultivars usually require some form of staking as they grow, and all garden dahlias need deadheading regularly, once flowering commences.

Many young singers start out as soubrettes but as they grow older and the voice matures more physically they may be reclassified as another voice type, usually either a light lyric soprano, a lyric coloratura soprano, or a coloratura mezzo-soprano.

The acorns are usually sessile, and grow to 0. 5-1 inch in length, falling in early October.

It usually turned out well for him because either he liked the right people or there were only a few wrong people in the town.

Even with all possible precaution, homecomings are usually rather cruel and sad, and only the perpetually ebullient and the continually optimistic are made happy by them.

The necrosis often involved only a portion of the length of a given fiber, and usually the immediately adjacent fibers were normal.

This behavior on her part subsided only after I had come to see the uncomfortably close similarity between, on the one hand, her arranging the ventilation of the common living room to her own liking, or turning the television off or on without regard to the wishes of the others, and on the other hand, my own coming stolidly into her room despite her persistent and vociferous objections, bringing my big easy chair with me, usually shutting the windows of her room which she preferred to keep in a very cold state, and plunking myself down in my chair -- in short, behaving as if I owned her room.

Programs usually are expanded only when outside funds are available or local business leaders demand it.

Drifts usually happened only with cattle, for hosses had 'nough sense to avoid 'em, and to find shelter for 'emselves.

So junior's bedroom was usually tricked out with heavy, nondescript pieces that supposedly could take the `` hard knocks '', while the fine secretary was relegated to the parlor where it was for show only.

This might be the proper standard of review, for example, if the lower court resolved the case by granting a pre-trial motion to dismiss or motion for summary judgment which is usually based only upon written submissions to the trial court and not on any trial testimony.

Generally, there is no trial in an appellate court, only consideration of the record of the evidence presented to the trial court and all the pre-trial and trial court proceedings are reviewed — unless the appeal is by way of re-hearing, new evidence will usually only be considered on appeal in " very " rare instances, for example if that material evidence was unavailable to a party for some very significant reason such as prosecutorial misconduct.

Members of the family are usually perennial herbs with sword-shaped unifacial leaves ; the inflorescence is a spike or panicle of solitary flowers, or forms a monochasial cyme or rhipidium ( meaning that the successive stems of the flowers follow a zig-zag path in the same plane ); and the flower has only three stamens, each opposite to an outer tepal.

Affidavits from persons who are dead or otherwise incapacitated, or who cannot be located or made to appear may be accepted by the court, but usually only in the presence of corroborating evidence.

Dau Miu () is a Chinese vegetable that has become popular since the early 1990s, and now not only appears on English-language menus, usually as " pea shoots ", but is often served by upscale non-Asian restaurants as well.

Wace usually only refers to li roi (" the king ") without naming him, and someone has taken an early mention of Uther's epithet Pendragon as the name of his brother.

Since the difference between the U. S. and International acre is only about a quarter of the size of an A4 sheet of paper ( 0. 016 square metres, 160 square centimetres or 24. 8 square inches ), it is usually not important which one is being discussed.

However, there is no universal standard for the Goðar amongst organizations, and the title is usually only significant to the particular group with whom they work.

Astrology's modern representation in western popular media is usually reduced to sun sign astrology, which considers only the zodiac sign of the Sun at an individual's date of birth, and represents only 1 / 12 of the total chart.

Multi-winged angels, often with only their face and wings showing, drawn from the higher grades of angels, especially cherubim and seraphim, are derived from Persian art, and are usually shown only in heavenly contexts, as opposed to performing tasks on earth.

When sitting in review of a decision, the Court will only look at the method in which the decision was arrived at, whereas in an administrative appeal the correctness of the decision itself will be examined, usually by a higher body in the agency.

On top of the spray chamber is a burner head that produces a flame that is laterally long ( usually 5 – 10 cm ) and only a few mm deep.

The advantage of this technique is that only a medium-resolution monochromator is necessary for measuring AAS ; however, it has the disadvantage that usually a separate lamp is required for each element that has to be determined.

As bookmakers become more proficient, the odds of making an ' arb ' usually last for less than an hour and typically only a few minutes.

Relativistic effects in the ion flight are usually ignored, as realisable ion speeds are only a very small fraction of the speed of light.