When working with flowers, there are many different kinds of greenery to consider. Whether the greens are in an arrangement of their own, or you use them as filler for centerpieces and bouquets — the right branch can make quite a difference. Below I have listed some of the more popular greens and their descriptions to help you get acquainted with their names and general appearances.

Leaves:

Galax - a plant, Galax urceolata, of the southeastern U.S., having rounded, evergreen leaves.
Ruscus - a genus of European evergreen shrubs; sometimes placed in the family Asparagaceace.
Cycas - any of several palmlike Old World tropical plants of the genus Cycas, some species of which are cultivated as ornamentals in warm climates.
Ivy - also called English Ivy, a climbing vine, Hedera helix, having smooth, shiny, evergreen leaves, grown as an ornamental.
Ficus - any of numerous tropical trees, shrubs, and vines belonging to the genus Ficus, of the mulberry family, having milky sap and large, thick or stiff leaves, including the edible fig, the banyan, and many species grown as ornamentals.
Smilax - any plant belonging to the genus Smilax, of the lily family, growing in tropical and temperate zones, consisting mostly of vines having woody stems.
Banana Leaf - any of several tropical and subtropical treelike herbs of the genus Musa having a terminal crown of large entire leaves and usually bearing hanging clusters of elongated fruits.
Lemon Leaf - a small evergreen tree that originated in Asia but is widely cultivated for its fruit.

Grasses:

Onion - bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb.
Bear - also called elk grass. a tall, western North American plant, Xerophyllum tenax, of the lily family, having narrow leaves and a dense, broad cluster of tiny white flowers.
Flax - any plant of the genus Linum, esp. L. usitatissimum, a slender, erect, annual plant having narrow, lance-shaped leaves and blue flowers, cultivated for its fiber and seeds.
Papyrus - a tall, aquatic plant, Cyperus papyrus, of the sedge family, native to the Nile valley: the Egyptian subspecies, C. papyrus hadidii, thought to be common in ancient times, now occurs only in several sites.
Willow - any tree or shrub of the genus Salix, characterized by narrow, lance-shaped leaves and dense catkins bearing small flowers, many species having tough, pliable twigs or branches used for wickerwork, etc.
Wheat Grass - A cereal grass and its grain, which furnishes a white flour for bread, and, next to rice, is the grain most largely used by the human race.

Ferns:

Maidenhair - any fern of the genus Adiantum, the cultivated species of which have fine, glossy stalks and delicate, finely divided fronds.
Boston - any fern of the genus Adiantum, the cultivated species of which have fine, glossy stalks and delicate, finely divided fronds.
Dragon - any of several araceous plants, as Arisaema dracontium (green dragon or dragonroot), the flowers of which have a long, slender spadix and a green, shorter spathe.
Lace - a small, tufted fern, Cheilanthes gracillima, having dark-brown stalks and fronds about 4 in. (10.2 cm) long.

Tropical:

Bamboo - any of the woody or treelike tropical and semitropical grasses of the genera Bambusa, Phyllostachys, Dendrocalamus, and allied genera, having woody, usually hollow stems with stalked blades and flowering only after years of growth
Palm Frond (Parlor Palm) - a small palm, Chamaedorea elegans, native to Central America, having a reedlike stem and long, pointed leaflets, widely cultivated as a houseplant.
Fanpalm - a fan palm, Livistona chinensis, of southern Japan, having very large, deeply cleft leaves and bluish-green, ovalish fruit.
Areca - any tropical Asian palm of the genus Areca, as the betel palm.

Other Popular Greenery Bushes:

Begonia - any tropical plant belonging to the genus Begonia, including species cultivated for the handsome, succulent leaves and waxy flowers.
Wandering Jew - any of various trailing or creeping plants, as Zebrina pendula or Tradescantia fluminensis, having green or variegated leaves: a popular houseplant.
Eucalyptus - any of numerous often tall trees belonging to the genus Eucalyptus, of the myrtle family, native to Australia and adjacent islands, having aromatic evergreen leaves that are the source of medicinal oils and heavy wood used as timber.
Boxwood - the hard, fine-grained, compact wood of the box shrub or tree, used for wood-engravers’ blocks, musical intstuments, etc.
2. the tree or shrub itself.
Dusty Miller - any of several composite plants, as Centaurea cineraria, Senecio cineraria, or the beach wormwood, having pinnate leaves covered with whitish pubescence.
Coleus - any of several tropical Asian or African plants belonging to the genus Coleus, of the mint family, certain species of which are cultivated for their showy, colored foliage and blue flowers.

Other Seasonal Greenery:

Oak Leaf - any tree or shrub belonging to the genus Quercus, of the beech family, bearing the acorn as fruit.
Maple Leaf - any of numerous trees or shrubs of the genus Acer, species of which are grown as shade or ornamental trees, for timber, or for sap.
Pine - any evergreen, coniferous tree of the genus Pinus, having long, needle-shaped leaves, certain species of which yield timber, turpentine, tar, pitch, etc.
Holly - any of numerous trees or shrubs of the genus Ilex, as I. opaca (American holly), the state tree of Delaware, or I. aquifolium (English holly), having glossy, spiny-toothed leaves, small, whitish flowers, and red berries.