Female flowers minute, entirely hidden within the buds during the winter, but early in spring their bright red, thread-like stigmas push out from the tips of the lateral or terminal buds.
Leaves alternate; flowers of two kinds, the staminate in heads, 5-parted; stigmas lateral.
The pollen, collected from adjoining trees in bloom or brought from a distance, can then be placed upon the stigmas and the sack replaced.
Trelease refers to several observations on proterandry (maturing of the pollen before the stigmas of the pistils) in the pecan.
These visions, which she afterwards recognised to be her own history, were several times repeated, and it is from them that the circumstances under which she received the stigmas became known.
Her stigmas were a source of indescribable suffering to her, down to the moment of her death.
The places of the stigmas were more red than usual.
She received the stigmas on the last days of the year 1812.
For, if thou fly devoutly to the wounds and precious stigmasof Jesus, thou shalt feel great comfort in tribulation.
No blood flowed from the stigmas excepting upon the 3rd of March, the day of the finding of the holy Cross.
Anne Catherine showed her all the love she could by comforting and praying for her, and closing her eyes with her own hands--those hands marked with the stigmas on the 13th of March of the same year.
The scars of the stigmas shone like silver beneath her distended skin.
Gynoecium of Iris, consisting of an inferior ovary o, and a style, with three petaloid segments s, bearing stigmas st.
Flower, from which the outer petals and the stigmas have been removed, leaving the inner petals (a) and stamens.
With many kinds, insects constantly carry pollen from neighbouring plants to the stigmas of each flower; and with some species this is effected by the wind.
In the Cucurbitaceæ several highly important characters have varied, such as the sessile position of the stigmas on the ovarium, the position of the carpels within the ovarium, and its projection out of the receptacle.
To carry on pollination the bags are removed and the pollen-bearing catkins are brushed lightly over the stigmas several times, one or more fresh catkins being used in each bag.
This is the time that pollination can take place, which period continues until the stigmas have lost their freshness and stickiness.
Each flower tends to have two yellowish green stigmatic lobes but three-lobed stigmas may be found and one case of a 4-lobed stigma was observed.
Insects were intentionally attracted to the flower; but the pollen with which their bodies thus became dusted was designed to be carried to the stigmas of another flower, showing cross-fertilization to be the intention in nearly all blossoms.
But Sprengel had supposed that the intention of the blossom was the reception of its own pollen, a fact which was again soon seen to be impossible, as the stigmas of many flowers are closed when their own pollen is being shed.
The flower opens; its stigma is closed; the projecting stamens scatter the loose pollen upon the moth as it sips close at the blossom's throat, and as it flies from flower to flower it conveys it to other blossoms whose stigmas are matured.
The anthers are golden brown, and the stigmas are spherical instead of filiform.
Their flowers without floral envelopes; pistils two; fleshy and hairy; stigmas filiform; dark.
During this second stage the flower may repeatedly be visited, but until this second crop of anthers become useless there is not the slightest risk of the stigmas becoming self-fertilized.
Also, the proboscis is very nearly stopped by the style, which, if its stigmas were ready for mating, would then and there become impregnated.
A day or two before its stigmas are ripe it produces first one set of five anthers, all pollen-coated, and then another.
When finally the second crop of anthers also fall off, then the style slowly uncoils and thrusts its now receptive stigmas above the calyx and in plain view of passing visitors.
If they are brushed clean of pollen, then the stigmas must rely on foreign pollen, of which it is assured a supply from the visits of pollen-laden insects from other flowers, which are still attracted by the flowers’ color and honey.
Scores of other plants also produce ripened stigmas before the pollen matures, and they must rely on insects to cross-fertilize them.
Only pollen of a certain species or variety is useful to the stigmas of that variety.
If these have not been brushed clean, as often or usually happens, then the stigmas ripen and, of course, are impregnated by their pollen.
Then the five stamens hitherto hidden in the calyx burst out and furnish a second crop of pollen, but the stigmas are still safely coiled away from the possible danger of self-impregnation.
In this magnolia, which has flowers several inches long, self-fertilization is impossible as the stigmas are ready to receive a mate several days before the laggard stamens are provided with the wherewithal.
I ask by what means are the anthers in many flowers and stigmas in other flowers directed to find their paramours?
Of these the anthers and stigmas have already been shown to possess some organs of sense, to be nourished by honey, and to have the power of generation like insects, and have thence been announced amongst the animal kingdom in Section XIII.
The short stigmas of squashes, for instance, can be reached more easily if the corolla is removed, as in Fig.
The novice will be obliged to remove the bags occasionally, to see if the stigmas are ready.
Be careful not to let any of it touch the stigmas of the flowers in pot No.
The bees going from flower to flower have carried the pollen from one bed to the other, and some of it, rubbing off on the stigmas as the bees searched for honey, fertilized the flowers.
The anthers and stigmas of flowers are probably nourished by the honey, which is secreted by the honey-gland called by Linneus the nectary; and possess greater sensibility or animation than other parts of the plant.
The simultaneous maturity of the anthers and stigmas of a blossom.
The anthers open in the flower-buds and pollinate the stigmas before the expansion of the flowers, thus assuring self-fertilization.
The stigmas themselves are of a different shape, more flattened and not cylindrical.
The same holds good for the number of ray-florets in the flower-heads of the composites, even for the number of stigmas on the ovaries of the poppies, which on weak branches may be reduced to as few as three or four.
The stigmas are above the anthers in the bud, and as the style increases in length at the time of the opening of the corolla, they are elevated above the anthers and do not receive the pollen.
It has very short styles, which bring the stigmas only up to the throat of the calyx tube, instead of upwards of the anthers.
They were ordinarily weak, sometimes very small, having only 5-9 stigmas on their central fruit.
The stigmas are slightly divergent from the normal type, [542] also being partly united with one another, and laterally with the summit of the style, but without detriment to their function.
Others have the stamens and stigmas widely separated and have to be pollinated artificially.
Styles short diverging from the base, with short stigmas laterally exserted.
Styles are short, with plumose stigmas and laterally exserted.
The anthers are yellow and they do not open until the stigmas and anthers of the fourth glume are thrown out.
Styles connate below, with stigmas very long, narrow and exserted at the top of the spikelets.
Styles are slender and distinct, with narrow stigmas exserted from the top of the glume.
The styles are free and stigmas are short exserted from the opening in the first glume.
The styles are slender and distinct with plumosestigmas exserted at the top of the spikelet.
Styles are short and stigmas slender and exserted.
Furthermore the stamens and the stigmas do not mature at the same time.
Ovary with purple stigmas and two small lodicules.
Styles are distinct with plumose stigmas exserted laterally near the apex of the spikelet.
Hibiscus vesicarius is strongly dichogamous, its pollen being shed before the stigmas are mature.
The pollen is generally shed and lost before the two stigmas in the same flower diverge and are ready to be fertilised.
The stigmas in two lately expanded flowers on a variety of cabbage, called Ragged Jack, were well covered with pollen from the same plant.
The fertilisation of these plants is generally aided by the stigmasbeing of large size or plumose; and in the case of the Coniferae, by the naked ovules secreting a drop of fluid, as shown by Delpino.
The stigmas on four other corymbs on both plants were well smeared with pollen from the flowers on their own corymbs; these eight corymbs produced altogether ten extremely poor seeds, which proved incapable of germinating.
A large number of the stigmas on several of the other corymbs were repeatedly smeared with pollen from their own corymb; but they yielded only five very poor seeds, which were incapable of germination.
I examined many flowers on both plants, and found the stigmas spontaneously covered with pollen; but they produced not a single seed.
This would have been most likely to occur with dichogamous species, for without much care it is not easy to perceive whether their stigmas are ready to be fertilised when the anthers open.
Pollen from a single plant growing quite separately was collected and placed on the stigmas of the same plant.
Having the form of a pencil; furnished with a pencil of fine hairs; ending in a tuft of hairs like a camel's-hair brush, as the stigmas of some grasses.
Every hybridizer knows how unfavourable exposure to wet is to the fertilisation of a flower, yet what a multitude of flowers have their anthers and stigmas fully exposed to the weather!
These stigmas became impregnated by pollen blown from some other adjacent plants of the same species; but had they been of different species, and not too remote in their organization, mule races must have resulted.
Some wallflowers and pinks had been growing in a garden, in a dry sunny situation, and their stigmas had been ripened so as to be moist, and to absorb pollen with avidity, although their anthers were not yet developed.
The pollen grains are taken to the stigmas in many ways, but the most usual agencies are insects and wind.
In our chapter on botanical work with the microscope we mentioned the feathery stigmas of grass flowers and we also stated that they took that form, so that pollen grains blown to them would be entangled in their branches.
In the case of grasses, wind is the agency and for that reason the stigmas of grass flowers are feathery, so that they can easily hold the pollen grains carried to them by the lightest breeze.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "stigmas" in a variety of sentences. We hope that you will now be able to make sentences using this word.
