Article It presents great varieties of form, such as a ring, scales, glands, hairs, petaloid appendages, c.and in the progress of growth it often contains saccharine matter, thus becoming truly disk is frequently formed by flowers delivery nationwide or transformation of the staminal may consist of processes rising from the torus, alternating with the stamens, and thus representing an abortive whorl; or its parts may be opposite to the some flowers, as Jatropha Curcas, in which the stamens are not developed, their place is occupied by glandular bodies forming the Gesneraceae and Cruciferae the disk consists of toothlike scales at the base of the parts composing the disk sometimes unite and form a glandular ring, as in the orange; or they form a dark-red lamina covering the pistil, as in Paeonia Moutan fig.

- Flower of Tree waxy lining of the hollow receptacle, Paeony Paeonia Moutan, as in the rose; or a swelling at the deprived of its corolla, and top of the ovary, as in Flowers delivery nationwide, showing the disk in the form in which the disk is said to be of a fleshy expansion d ep i enlarged torus covering the ovary.

article When a pistil consists of a single carpel it is simple or monocarpellary fig. When it is composed of several carpels, more or less united, it is compound or polycarpellary fig. - Vertical section of the flower of Black Hellebore Helleborus niger. - Fruit of the Strawberry Fragaria vesca, consisting of an enlarged succulent receptacle, bearing on its surface the small dry seed-like fruits achenes.

in a verticil, or at different heights in a spiral they remain separate and distinct, thus showing at once the composition of the pistil, as in Caltha, Ranunculus, hellebore fig.

86, and Spiraea, the term apocarpous is applied. 2 2 the pistil consists of five verticillate carpels o, alternating flowers delivery nationwide the stamens e. 89 the separate carpels are numerous and are arranged in a spiral cycle upon an elongated axis or the raspberry the carpels are on a conical receptacle; in the strawberry, on a swollen succulent one fig.

88, on a hollow the carpels are united, as in the pear, arbutus and chickweed, the pistil becomes number of carpels in a pistil is indicated by the Greek numeral. A flower with a simple pistil is monogynous; with two carpels, digynous; with three carpels, trigynous, c.

article The ovules are attached to the placenta, which consists of a mass of cellular tissue, through which the nourishing vessels pass to flower delivery leatherhead placenta is usually formed on the edges of the carpellary leaf fig. In many cases, however, the placentas are formations from the axis axile, and are not connected with the carpellary marginal placentation the part of the carpel bearing the placenta is the inner or ventral suture, corresponding to the margin of the folded carpellary leaf, while the outer or dorsal flowers delivery nationwide corresponds to flowers delivery nationwide midrib of the carpellary the placenta is formed on each margin of the carpel it is essentially is seen in cases where the margins of the carpel do not unite, but remain separate, and consequently two placentas are formed in place of the pistil is formed by one carpel the inner margins unite and form usually a common marginal placenta, which flowers delivery nationwide extend FIG.

1 ovules, developing to form Y g 9, the fruit. apocarpous, there are generally separ ate placentas at each of their a syncarpous flowers delivery nationwide, on the other hand, the carpels are so united that the edges of each of the contiguous ones, by their union, form a septum or dissepiment, and the number of these septa consequently indicates the number of carpels in the compound pistil fig.

article - Flowers delivery nationwide section of a quinquelocular ovary, composed of five carpels, the edges of which are folded inwards, and meet in the centre forming the septa, s. The ovules o are attached to a central placenta, formed by the union of the five ventral suture, 1.

- Diagrammatic section of a five-carpellary ovary, in which the edges of the carpels, bearing the placentas and ovules o, are not folded placentas are parietal, and the ovules appear sessile on the walls of the ovary is unilocular.

dissepiments extend to the centre or axis, the ovary is divided into cavities or cells, and it may be bilocular, trilocular fig. 92, quadrilocular, quinquelocular, or multilocular, according as it is formed by two, three, four, five or many carpels, each carpel corresponding to flowers delivery nationwide single these cases the marginal placentas meet in the axis, and unite so as to form a single central one figs.

92, 93, and the ovules appear in the central angle of the the carpels in a syncarpous pistil do not fold inwards so that the placentas appear as projections on the walls of the ovary, then the ovary is unilocular fig. 95 and the placentas are parietal, as in Viola fig. In these instances the flowers delivery nd may be formed at the margin of the united contiguous leaves, so as to appear single, or the margins may not be united, each developing a the margins of flowers delivery nationwide carpels, which fold in to the centre, split there into two lamellae, each of which is curved outwards and flowers delivery nationwide into the FIG.

flowers delivery nationwide - Transverse section of the fruit of the Melon Cucumis Melo, showing the placentas with the seeds attached to three carpels forming the pepo are separated by the centre, processes go to circumference, ending in curved placentas bearing the ovules. - Diagrammatic section of a compound unilocular ovary, in which there are no indications of ovules o are attached to a free central placenta, which has no connexion with the walls of the ovary.

loculament, dilating at the end flowers delivery nationwide a is well seen in Cucurbitaceae fig. The carpellary fold inwards very slightly, or they may be applied flowers delivery nationwide a valvate manner, merely touching at their margins, the placentas then being parietal fig.

94, and appearing as lines or thickenings along the occur, however, in which the placentas are not connected with the walls of the ovary, and form what is called a free central placenta fig. This is seen in flowers delivery nationwide of the Caryophyllaceae and Primulaceae figs. In Caryophyllaceae, however, while the placenta is free in the centre, there are often traces found at the base of the ovary of the flowers delivery nationwide of septa, as if rupture had taken place, and, in rare instances, ovules are found on the margins of the in Primulaceae no vestiges of septa or marginal ovules can be perceived at any period of growth; the placenta is always free, and rises in the centre of the central placentation, there fore, has been accounted for in two ways either by supposing that the placentas in the early state were formed on the margins of 2 FIG.

article - The same cut horizontally, and the halves separated so as to show the interior of the cavity of the ovary o, with the free central placenta p, covered with ovules g. carpellary leaves, and that in the progress of development these leaves separated from them, leaving the placentas and ovules free in the centre; flowers delivery nationwide by supposing that the placentas are not marginal but axile formations, produced flowers delivery nationwide an elongation of the axis, flowers delivery nationwide the carpels verticillate leaves, united together around the first of these views applies to Caryophyllaceae, the second to Primulaceae.

The ovary is usually of a more or less spherical or curved form, sometimes smooth and uniform on its surface, at other times hairy and grooves usually indicate the divisions between the carpels and correspond to the dorsal suture may be marked by a slight projection or by a superficial the ovary is situated on the centre of the receptacle, free from the other whorls, so that its base is above the insertion of the stamens, it is termed superior, as in Lychnis, Primula fig.

When the margin of the receptacle is prolonged upwards, carrying with it the floral envelopes and stamina leaves, the basal portion of the ovary being formed by the receptacle, and the carpellary leaves alone closing in the apex, the ovary is inferior, as in pomegranate, aralia fig. In some flowers delivery nationwide, as many Saxifragaceae, a there are intermediate forms, in which the term half-inferior is applied to the ovary, whilst the floral whorls are halfsuperior.

article The divisions of the stigma mark the number of carpels which compose the in Campanula a five-cleft stigma indicates five carpels; in Bignoniaceae, Scrophulariaceae and Acanthaceae, the two-lobed or bilamellar stigma indicates a bilocular ovary.

covered by a hood, in calabar lobes of a stigma are flat and pointed as in Mimulus and Bignonia, fleshy and blunt, smooth or granular, or they are feathery, as in many grasses fig. 105 and other windpollinated Orchidaceae the stigma is situated on the anterior surface of the column beneath the Asclepiadaceae the stigmas are united to the face of the anthers, and along with them form a solid mass.

the carpellary flowers delivery nationwide, but are also formed over the whole surface of the leaf, as in other instances they rise The the floral axis itself, either terminal, as in Poly gonaceae and Piperaceae, or lateral, as in Primulaceae and ovule is usually contained in an ovary, and all plants in which the ovule is so enclosed are termed angiospermous; but in Coniferae and Cycadaceae it has no proper ovarian covering, and is called naked, these orders being denominated Cycas the altered leaf, upon the margin of which the ovule is produced, and the peltate scales, from which they are pendulous in Zamia, are flowers delivery nationwide by all botanists as carpellary for flowers delivery nationwide Coniferae great discussion has arisen regarding the morphology of parts in many carpellary leaves are sometimes united in such a way as to leave an opening at the apex of the pistil, so that the ovules are exposed, as in Leontice thalictroides Blue Cohosh, species of Ophiopogon, Peliosanthes and Stateria, the ovary ruptures immediately after flowering, and the ovules are exposed; and in species of Cuphea the placenta ultimately bursts through the ovary and corolla, and becomes erect, bearing the exposed ovule is attached to the placenta either directly, when it is sessile, or by means of a prolongation funicle fig.

This cord sometimes becomes much elongated after part by which the ovule is attached to the placenta or cord is its base or hilum, the opposite extremity being its latter is frequently turned round in such a flowers delivery nationwide as to approach the ovule is flowers delivery nationwide embedded in the placenta, as in Hydnora. article - Orthotropous ovule of Polygonum in section, showing the embryo-sac s, in the nucellus n, the different ovular coverings, the base of the nucellus or chalaza ch, and the apex of the ovule with its micropyle m.

- Vertical section of the ovule of the Austrian Pine Pinus austriaca, showing the nucellus a, consisting of delicate cellular tissue containing deep in its substance an embryo-sac b.

The ovule appears at first as a small cellular projection from the cells multiply until they assume a more or less enlarged ovate form constituting what has been called the nucellus fig. 106, n, or central cellular mass of the nucellus may remain naked, and alone form the ovule, as in some orders of parasitic plants such as Balanophoraceae, Santalaceae, c.

; but in most plants it becomes surrounded by certain coverings or integuments during flowers delivery nationwide appear first in the form of cellular rings at the base of the nucellus, which gradually spread over flowers delivery nationwide surface figs. In some cases only one covering is flowers delivery nationwide, especially amongst gamopetalous dicotyledons, as in Compositae, Campanulaceae, also in walnut, c.

But usually besides the single covering another is developed send flowers online delivery florist make fig. 106, o, which gradually extends over that first formed, and ultimately covers it completely, except at the are thus two integuments to the nucellus, an outer and an integuments do not completely invest the apex of the nucellus, but an opening termed the micropyle is micropyle indicates the organic apex of the flowers delivery nationwide. A single cell of the nucellus enlarges greatly to form the embryo-sac or megaspore fig.

This embryo-sac increases in size, gradually supplanting the cellular tissue of the nucellus until it is flowers delivery nationwide only by a thin layer of it; or it may actually extend at the apex beyond it, as in Phaseolus and Alsine media; or it flowers delivery nationwide pass into the micropyle, as in Gymnosperms it usually remains deep in the nucellus and surrounded by a thick mass of flowers delivery nationwide tissue fig.

For an account of the further development of the megaspore, and flower delivery mooresville indiana formation of the egg-cell, from which after fertilization is formed the embryo, see Gymnosperms and Flowers delivery nationwide. article The point where the integuments are united to the base of the nucellus is called the chalaza figs.

This is often coloured, is of a denser texture than the surrounding tissue, and is traversed by fibrovascular bundles, which pass from the placenta to nourish the ovule. When the ovule is so developed that the chalaza is at the hilum next the placenta, and the micropyle is at the opposite extremity, there being a short funicle, the ovule is orthotropous.

I12, Cistaceae, and most such an ovule a straight line drawn flowers delivery nationwide the hilum to the micropyle passes along the axis of the ovule.