Fronds Sentence Examples

The blanched fronds are also sold in large quantities for the processions of Palm Sunday, and after they have received the blessing of the priest they are regarded throughout Spain as certain defences against lightning.

P. dryopteris, generally known as oakfern, is a very graceful plant with delicate fronds, 6 to 12 in.

If during this process part of the fronds run together, the beauty of the specimen may be restored by dipping the edge into water, so as to float out the part and allow it to subside naturally on the paper.

It is represented in Britain by four species of Lemna, and a still smaller and simpler plant, Wolfa, in which the fronds are only one-twentieth of an inch long and have no roots.

The fronds of some of these Carboniferous ferns are almost identical with those of living species.

P. phegopteris (beechfern) is a graceful species with a black, slender root-stock, from which the pinnate fronds rise on long stalks, generally about 12 in.

From the lower part of a carpel are produced several laterally placed ovules, which become bright red or orange on ripening; the bright fleshy seeds, which in some species are as large as a goose's egg, and the tawny spreading carpels produce a pleasing combination of colour in the midst of the long dark-green fronds, which curve gracefully upwards and outwards from the summit of the columnar stem.

In others again (Woodwardia orientalis, Asplenium bulbiferum), buds are numerously produced on the upper surface of the fronds.

Some species of saxifrage and of ferns also produce buds on their leaves and fronds.

Similarly, the dead fronds fall off,leaving a ragged petiole, which is afterwards separated from the stem by an abscess-layer a short distance above the base.

In Cycas the stem apex, after producing a cluster of carpellary leaves, continues to elongate and produces more budscales, which are afterwards pushed aside as a fresh crown of fronds is developed.

Such ferns as Gymnogrammas, which have their surface covered with golden or silver powder, and certain species of scalysurfaced Cheilanthes and Nothochlaena, as they cannot bear to have their fronds wetted, should never be syringed; but most other ferns may have a moderate sprinkling occasionally (not necessarily daily) and as the season advances sufficient air and light must be admitted.

When found detached these leaves were taken for the fronds of a Fern.

No traces of sori have so far been found on the fronds.

There are various cultivated forms - cristata has the ends of the fronds and the pinnae finely crested, and corymbifera has curiously forked and crested fronds.

The great majority of specimens of fossil fern-like plants are preserved in the form of carbonaceous impressions of fronds, often of remarkable perfection and beauty.

It is, however, probable that a considerable group of true Ferns, allied to Marattiaceae, existed in Palaeozoic times, side by side with simpler forms. In one respect the fronds of many Palaeozoic Ferns and Pteridosperms were peculiar, namely, in the presence on their rachis, and at the base of their pinnae, of anomalous leaflets, often totally different in form and venation from the ordinary pinnules.

Typically Marattiaceous sori, consisting of exannulate sporangia united to form synangia, are frequent, and are almost always found on fronds with the character of Pecopteris, large, repeatedly pinnate leaves, resembling those of Cyatheaceae or some species of Nephrodium.

There is evidence that in many cases these Pecopteroid fronds belonged to arborescent plants, the stems on which they were borne reaching a height of as much as 60 ft.

The genus Asterotheca includes a number of Ferns, chiefly of Coal Measure age, with fronds of the Pecopteris type.

In many fern-like plants of this period the fronds were dimorphic, the fertile leaves or pinnae having a form quite different from that of the vegetative portions.

It is characteristic of Zygopteris and its near allies that two rows of pinnae were borne on each side of the rachis, at least in the fertile fronds.

In 1905 Grand' Eury discovered the seeds of Pecopteris Pluckeneti, an Upper Coal Measure species, attached, in immense numbers, to the fronds, which are but little modified as compared with the ordinary vegetative foliage.

There is reason to believe that other species of Pecopteris and similar genera, (Callipteris and Mariopteris) bore seeds, though the artificial group Pecopterideae probably also includes the fronds of true Marattiaceous Ferns.

Archaeocalamites, Bothrodendron, Archaeopteris, Megalopteris, &c. Among fern-like fronds Diplotmema and Rhacopteris are characteristic. Some of the Lepidodendreae appear to approach Sigillariae in external characters.

Numerous fronds such as Alethopteris Neuropteris, Mariopteris, &c., belonged to Pteridosperms, of which specimens showing structure are frequent in certain beds.

The genus possessed small broadly oval or triangular leaves in addition to the large fronds like that shown in fig.

Among the large number of Mesozoic Ferns there are several species founded on sterile fronds which possess but little interest Filicales, from a botanical standpoint.

As examples of these doubtful forms may be mentioned Thinnfeldia, characteristic of Rhaetic and Lower Jurassic rocks; Dichopteris, represented by some exceptionally fine Jurassic specimens, described by Zigno, from Italy; and Ctenis, a genus chiefly from Jurassic beds, founded on pinnate fronds like those of Zamia and other Cycads, with linear pinnae characterized by anastomosing veins.

The close resemblance between specimens from Jurassic rocks placed in one or other of the genera Thinnfeldia, Dichopteris, Cycadopteris, &c., illustrates the unsatisfactory custom of founding new names on imperfect fronds.

It has been found useful in some cases to examine microscopically the thin film of coal that often covers the pinnae of fossil fronds, in order to determine the form of the epidermal cells which may be preserved in the carbonized cuticle; rectilinear epidermal cell-walls are usually considered characteristic of Cycads, while cells with undulating walls are more likely to belong to Ferns.

Leaving out of account the numerous sterile fronds which cannot be certainly referred to particular families of Ferns, there are several genera which bear evidence in their sori, and to some extent in the form of the leaf, of their relationship to existing types.

Bipinnate sterile fronds of Todites have in some instances been described under the designation Pecopteris whitbiensis.

The dichotomously-branched fronds, of the type represented by several recent species of Gleichenia, e.g.

The numerous species of fronds from Jurassic and Wealden rocks of North America and Europe referred to Thyrsopteris, a recent monotypic genus confined to Juan Fernandez, are in the majority of cases founded on sterile leaves, and of little or no botanical value.

This type is distinguished by its large bipinnate fronds bearing long and narrow pinnae with close-set pinnules, characterized by the anastomosing secondary veins.

Similarly, the genus Sagenopteris, characterized by a habit like that of Marsilia, and represented by fronds consisting of a few spreading broadly oval or narrow segments, with anastomosing veins, borne on the apex of a common petiole, is abundant in rocks ranging from the Rhaetic to the Wealden, but has not so far been satisfactorily placed.

The evidence adduced by Nathorst and some other writers is, however, not convincing; until we find well-preserved sporocarps in connection with vegetative fronds we prefer to keep an open mind as regards the position of Sagenopteris.

In most cases we have only the evidence of sterile fronds, and this is necessarily unsatisfactory; but the occurrence of numerous stems and fertile shoots demonstrates the wealth of Cycadean plants in many parts of the world, more particularly during the Jurassic and Wealden periods.

From Palaeozoic rocks a few fronds have been described, such as Pterophyllum Fayoli, P. Combrayi, Plagiozamites and the leaves of Todites, a genus which may often be recognized by the broad and relatively short bluntly-terminated pinnules.

Sphenozamites, chiefly from French localities, which are referred to 1 fronds, which therg is good reason to refer to the Cycadales in the Cycads because of their similarity to the pinnate fronds of Upper Triassic, Rhaetic, Jurassic and Wealden rocks in India, modern Cycadaceae.

Dorsetshire and in the Inferior Oolite beds of Yorkshire, as well as in Rhaetic strata in Persia and elsewhere; it is characterized by its bipinnate fronds, and may be compared with the recent Australian genus Bowenia - peculiar among living Cycads in having bipinnate fronds.

Another well-known Cycadean genus is Williamsonia, so named by Mr Carruthers in 1870, and now applied to certain pinnate fronds - e.g.

There can be little doubt that the majority of the Cycadean fronds of Jurassic and Wealden age, which are nearly always found detached from the rest of the plant, were borne on stems of the Bennettites type.

Williamson was the first to express the opinion that the Bennettitean flowers known as Williamsonia were borne on the trunks which terminated in a crown of pinnate fronds of the type long known as Zamites gigas; this view was regarded by Saporta and others as incorrect, and the nature of the Bennettitean foliage was left an open question.

Meanwhile, trim the fennel, reserving the fronds.

Both types are a simple pinnate form but the pinnae of the spore producing fronds are very much narrower.

Some will have incredibly dense fronds that are produced almost vertically which may also twist as well.

Thus any incompletely unfurled fronds may be destroyed by the first autumnal frost, whereas mature fronds may escape.

The light arching fronds of ferns are a lovely addition to baskets hung in shadier positions.

Palm growers supply cut palm fronds, without harm to growing trees.

Again sterile fronds are sent up first, then later in the year the fertile fronds appear.

In time the plant can cover quite a large area with its light green fronds, which darken with age.

The litter of dead fronds from the previous year provide some frost protection.

With a thick mass of roots forming a trunk, up to 3m (10ft) long, mid- to dark green fronds.

When the young fronds first appear they are quite tightly coiled.

Above the entrance large kelp fronds can be seen swaying in the waves 10 or 15 meters above.

Yesterday, the third time we had used it, I was shredding dead tree fern fronds.

The map is explained on a rostrum supported by an anchor and metal seaweed fronds made by local blacksmith Ken Dowber.

Season to taste with pepper and garnish with the fennel fronds.

The breeze from the Bay of Bengal was bracing, the sun glistened off the azure ocean and the palm fronds swayed.

Relatively short fronds growing almost vertically that are congested with overlapping pinnae giving a very dense appearance.

The fronds of towering palm trees jostle for position above the medieval ramparts where nesting storks colonize each vacant turret.

The majority of these fronds have now fallen under suspicion and .can no longer be accepted as those of Ferns; the indications often point to their having belonged to fern-like Spermophyta, as will be shown below.

Even ice begins with delicate crystal leaves, as if it had flowed into moulds which the fronds of waterplants have impressed on the watery mirror.

She bent over and examined the bushes, finding a quart bottle hidden within the fronds and leaves.

On the underside of the fronds tiny structures develop - containing the spores which will eventually produce new plants.

The new fronds had recently unfurled when this photo was taken in July.

The leaves, or fronds, are used for the roofs of houses for native people.

For example, some shower curtains combine old world nautical maps with harbor lighthouses in the foreground complete with palm fronds and picket fencing.

A noble evergreen Tree Fern, having a stout trunk, 30 feet high or more, the fronds forming a magnificent crown, often 20 to 30 feet across.

Its graceful pale green fronds are 1 to 2 feet long and 5 to 9 inches broad, twice or thrice divided, and carried upon roots which creep just under the ground.

The fronds are held very erect upon hairy stems, are soft in texture, and dry prettily in the autumn, when the tiny glands on the under surface give out a pleasing fragrance to which the plant owes its name of the Hay-scented Fern.

The leaves of this Day Lily were overhanging the banks of the stream, intermingled with the Fern fronds, while the flower-heads, tall and straight, were towering upwards.

Fine specimens have been seen between the joints of brick-work at the tops of old wells, the fronds developing fine proportions.

L. alpina, a native of New Zealand, is dwarf, and produces from a creeping rhizome abundance of dark shining green fronds, 4 to 6 inches in height.

America, its stout leathery fronds once cut to the midrib being 4 or 5 feet long, and produced on stout red stalks from a prostrate fleshy stem or trunk.

Gilliesii, another fine evergreen form from Chili, differs from that just described in its short erect trunk, and shorter fronds on pale green stalks.

H. millefolium is a very elegant New Zealand Fern, with a stout and wide-spreading rhizome, from which arise erect light green fronds, 1 to 1 1/2 feet high, very finely cut.

The fronds are finely divided, an intensely dark green, from 1 to 2 feet high, and useful for bouquets, or for placing loosely in vases with cut flowers.

P. alpestre resembles the Lady Fern, with fronds dark green, and sometimes exceeding 2 feet in length.

America, is hardy in sheltered positions, and has elegant tapering dark green fronds about 1 foot in height.

This very handsome Fern, C. dealbata, known in New Zealand as the Silver Tree-fern, has a slender, almost black stem, 4 to 8 feet high, ending in a fine crown of fronds, dark green above and milk-white below.

American Fern, remarkable for its narrow fronds, which taper into slender prolongations, and take root at the tips like runners, giving rise to young plants.

All are handsome, with broad beautifully arching fronds, which are especially ornamental if seen a little above the level of the eye.

Pinnate palm trees have fronds that resemble feathers.

This means that as the fronds die they will fall off on their own.

The tall, fern-like fronds are actually produced by the asparagus plants themselves; don't mistake them for weeds.

While the classic palm tree pendant is a simple tree in white gold, silver, or platinum and studded with diamonds along the fronds and trunk, there are many additional designs to choose from.

Kelp Forest - Common slimy-looking kelp becomes a learning experience through the 28 foot high Kelp Forest exhibit, which lets you can view the full length of the kelp fronds from various levels throughout the Aquarium.

Raffia is a palm frond looking string that usually comes in a light brown and can pass for palm fronds.

With some palm fronds and more Tiki masks set up around the bar you have your luau party decorations going.

The young leaves arise on the stem-apex as conical protuberances with winged borders, on which the pinnae appear as rounded humps, usually in basipetal order; the scale-leaves in their young condition resemble fronds, but the lamina remains undeveloped.

All round its head and also along the body the skin bears fringed appendages resembling short fronds of sea-weed, a structure which, combined with the extraordinary faculty of assimilating the colour of the body to its surroundings, assists this fish greatly in concealing itself in places which it selects on account of the abundance of prey.

In such cases, as will be explained below, there is a strong presumption that the fronds were not those of Ferns, but of seed-bearing plants of the new class Pteridospermeae.

Various other seeds of the same type are known, and in a great number of instances Grand' Eury has found the fronds of Neuropterideae (Medulloseae) in close association with definite species of seeds, so there can be little doubt that the whole family was seed-bearing.

This Jurassic species bore bipinnate fronds not unlike those of the South African, Australian, and New Zealand Fern Todea barbara, which were characterized by a stout rachis and short broad pinnules bearing numerous large sporangia covering the under surface of the lamina.

Not unlike the runner, though growing in a very different way, are the bud-plants formed on the fronds of several kinds of ferns belonging to the genera Asplenium, Woodwardia, Polystichum, Lastrea, Adiantum, Cystopteris, &c. In some of these (Adiantum caudatusn, Polystichum lepidocaulon) the rachis of the frond is lengthened out much like the string of the strawberry runner, and bears a plant at its apex.

Such ferns as Gymnogrammes, which have their surface covered with golden or silver powder, and certain species of scaly-surfaced Cheilanthes and Nothochlaena, as they cannot bear to have their fronds wetted, should never be syringed; but most other ferns may have a moderate sprinkling occasionally (not necessarily daily), and as the season advances, sufficient air and light must be admitted to solidify the tissues.

In Cystopteris the buds are deciduous, falling off as the fronds acquire maturity, but, if collected and pressed into the surface of a pot of soil and kept close, they will grow up into young plants the following season.

The zoarium may rise up into erect growths composed of a single layer of zooids, the orifices of which are all on one surface, or of two layers of zooids placed back to back, with the orifices on both sides of the fronds or plates.