WHILE our architects and citizens are debating the propriety of originating a perfectly new style of American Architecture, - necessity - the mother of invention - is leading our villas and country residences out of the time worn track, by the force of circumstances alone. We cannot do without shade. It is the one idea that pervades all our visions, and enters into all our calculations of ease, luxury and comfort. In no other country besides ours, and where the pursuit of happiness leads men so rationally to the delightful pleasures of country life, is shade so much sought after, or so very desirable. Protection from our scorching summer's sun is almost born with us, - and has become one of the prominent phrenological "bumps" on our national cranium. Shade trees surround all our houses of any pretensions; and porches, verandas, and piazzas in every direction, tell us that our houses have many striking peculiarities which distinguish them from those of foreign lands. Let the style be what it may, - Gothic, Grecian, Norman, or Elizabethan, the piazza or veranda must not be forgotten or set aside.

It occurs to me that while enjoying the shade the piazza affords, we may at the same time have the gratification of being surrounded by our floral pets, and that too in a manner that will give a pleasing variety to our gardening operations. Not only may we have beautiful climbing vines and flowers trained to the posts, pillars or connecting lattice work, but over our heads and around us the most interesting effects may be produced by growing flowers in suspended vases or baskets. Nature has kindly provided us with the means of enjoyment, under even apparently the most unpropitious circumstances, and here she affords us a large list of plants, which not only grow well in the shade, but from their drooping or pendulous habit seem to have been as expressly designed by her for this very mode of culture, as a watch from its works seems designed to measure time. As she has provided the plants, we cannot do less than supply the baskets, and accompanying this article, we give sketches of very pretty patterns made of pottery ware, which or similar, may be had of the principal horticultural stores in the large cities. Some very handsome articles may also be made for the same purposes out of branches of trees; Oak, Cedar, or of some durable wood.

Common boards may even be nailed together, and taste and ingenuity exercised in covering it with bark, or the scales of Pine cones. In these vases, and in the partial shade afforded, the following plants will thrive well, requiring but little water or other attention; and at the approach of winter may be taken down, and hung in the parlor, hall or entry, to add an additional charm to domestic pleasures for the rest of the year.

1. Linaria cymbalaria; (Ivy leaved Snapdragon.) Well known to European travellers from its frequency on the walls of shaded ruins. It is a delicate and graceful grower bearing a profusion of small purple flowers the whole season.

2. Lysimachia numolaria (Yellow creeping Loosestrife) has a very pretty habit of growth in its slender stems and small opposite leaves, bearing as it grows in their axils yellow flowers about the size of gold dollars.

8. Saxifraga sarmentosa (creeping Saxifrage.) Its foliage is very prettily veined and marbled, and the spikes of white flowers it throws up, are curious as well as handsome.

4. Fragraria Indica; (Mock Strawberry.) Its fruit though as insipid and tasteless as the food of ghosts might be supposed to be, is so very pretty, and it does so well in the shade, that there are few things I would sooner recommend for our purpose.

5. Vinca major; (Large periwinkle.) An evergreen with leaves one and a half to two inches long by one broad, and large blue flowers opening only in the spring; best adapted for large baskets.

6. V. minor, (Lesser periwinkle.) Smaller every way than the last; yet very distinct and handsome.

7. V. perenne, (Creeping periwinkle.) A very distinct species, with long slender creeping stems, small leaves, and small very early blue flowers.

8. Cereus flagelliformis; ( Cats tail or creeping cereus), - grows well in the shade in summer, and when removed to the parlor in winter, flowers well near the light of a window.

9. Sedum Sieboldii; (Siebold's stone crop) with pale purple flowers and glaucous leaves; requires little water or pot-room, and is well adapted for a small vase.

10. Sedum acre; (Yellow stone crop, or "Love entangle*9), doing well in either sunshine or shade, and a most abundant bloomer.

11. Viola odorata arborea, (Tree violet), which, with strong central stalks send out numerous slender branchlets, hanging over the sides of the pot or basket, and bearing a profusion of very sweet doable blue flowers.

12. Calystegia pubescens, (Double convolvulus). A pretty flowering plant and not likely to be so much objected to on account of its creeping roots here as in the open ground.

13. Epigea repens, (Ground laurel), a hardy evergreen with deliciously scented waxy white flowers, very pretty.

14. Mitchella repens, (Partridge berry), another evergreen with sweet scented white flowers, succeeded by numerous holly like berries.

15. Polemoninm reptans, (creeping valerian), erect spikes of blue flowers, from branchlets which hang over the sides of the basket.

I have confined myself to hardy or very nearly hardy plants; and which will thrive and do well in the shade - any of the above may be depended on.

[Our correspondent has noticed a mode of growing a very interesting variety of plants, and might have extended the list very greatly. We merely indicate a few more here, with the request that Mr. M. will pursue the subject, and give a list of plants suitable for hanging in the greenhouse, to be thence, if required, transferred occasionally to the drawing room or conservatory.

Cobaea scandens as a basket-suspending plant does well, but requires a largish pot and plenty of space to droop in.

The Lophospermums. Every species of this genius will answer well.

Maurandia. All the species and varieties. , Nierenibergia. All will do well in baskets.

Roses trained downward, particularly the Viscomtesse des Gates, will grow and flower well in baskets in greenhouses.

The Ivy-leaved Geranium in suspended pots quite covers and conceals them.

The Verbena, and even the grateful Strawberry, might be cultivated in this way, under glass, and would yield to few other plants for beauty in bloom and fruit, besides yielding a dish now and then of one of the most health-giving fruits we possess. - Ed].