Petunia flower Anatomy

flower (plant anatomy) -- Encyclopedia Britannica

January 26, 2014 – 06:53 am

Natural and Still Life Forms

flower the reproductive portion of any plant in the division Magnoliophyta (Angiospermae), commonly called flowering plants or angiosperms. As popularly used, the term “flower” especially applies when part or all of the reproductive structure is distinctive in colour and form.

In their range of colour, size, form, and anatomical arrangement, flowers present a seemingly endless variety of combinations. They range in size from minute blossoms to giant blooms. In some plants, such as poppy, magnolia, tulip, and petunia, each flower is relatively large and showy and is produced singly (see photograph), while in other plants, such as aster, snapdragon (see photograph), calla lily, and lilac, the individual flowers may be very small and are borne in a distinctive cluster known as an inflorescence. Regardless of their variety, all flowers have a uniform function, the reproduction of the species through the production of seed. The flower is the characteristic structure of the evolutionarily highest group of plants, the angiosperms. (See also angiosperm.)

Basically, each flower consists of a floral axis upon which are borne the essential organs of reproduction (stamens and pistils) and usually accessory organs (sepals and petals); the latter may serve to both attract pollinating insects

Source: www.britannica.com


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Yep, they'll do a number on geranium flowers

And also petunias, and other ornamental tobacco family plants. There's a good little article from Sunset on the problem here:
Looks like you can use the "organic" Bacillus (BT) for control besides picking each little worm out of there. BT's about the only thing to spray on anyway, since the pest is apparently notoriously immune to insecticides.
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Petunias

Look on leaves for little brown flecks if u find them, u most likely have budworms. the flecks r their poop. they destroy flowers,buds and leaves. I have recently seen japanese beetles obliterate the poor plants in two days. try spraying water lightly over plants and then quickly scan for moving insects, as this may help to identify them..or...shake plant over a bag and see if a bug drops in. this can he also help identify. could b slugs if there is mulch near . check soil on ground or pot for snails ,slugs etc. I hand pick most slugs,snails, and beetles and have good results.good luck


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