Rose 34 Herbs, trees and shrubs. Flowers often single and have roundish petals. Stamens are numerous, leaves are alternate and often have stipules (small leaf-like structures at the bases of the leaf stalks).
Pink 17 Tips of petals usually notched or fringed. There may appear to be 10 petals if each petal is completely or almost completely cleft. Leaves opposite, simple and smooth edged.
Parsley 16 Flowers very small, usually borne in umbels (umbrella-like clusters) or compound umbels. Leaves alternate, often pinnately compound.
Honeysuckle 13 Shrubs or twining vines. Leaves opposite, may be simple or compound. Flowers may be radially symmetrical or bilaterally symmetrical.
Mallow 12 The showy flowers have large petals, stamens are united. Leaves alternate and often palmately lobed. May be velvety.
Maple 11 Trees or shrubs with opposite, long-stalked, palmately lobed leaves. Flowers asre 5-part and some are radially symmetrical, while others are flattened and cup-shaped and have little obvious symmetry. The fruit is a pair of flat, long-winged, 1-seeded keys.
Heath 9 Plants are often evergreen shrubs. Usually 5 separate or united petals. Flowers often dish-shaped. Also can be small, woodland flowers with drooping, bell-shaped flowers, evergreen leaves and berry-like fruit.
Morning Glory 8 Plants are usually climbing vines with showy, bell-shaped flowers. Dodder is a parasitic vine with tiny flowers and no leaves.
Forget-Me-Not/Borage 8 Flowers small and borne on one side of a curved or coiled stem that straightens with growth (like some Waterleaf species). Leaves are alternate and smooth edged, often hairy. There are drooping clusters of bell-shaped flowers in the Mertensia genus of the Forget-me-not family.
Tomato/Nightshade 7 Petals usually united. Five stamens. Leaves simple, alternate. Fruit a pod or berry (surrounded by a papery sack in the Ground cherries).
Saxifrage 7 Usually herbs but may also be shrubs. The herbs are small plants with flowers in racemes, spikes or clusters. Leaves mostly in basal rosettes.
Primrose 6 Five stamens opposite rather than between the petals. Flowers usually flat, but in the genus Dodecatheon petals are swept back and the stamens are united into a beak. Leaves often whorled, may be opposite or basal.
Phlox 6 Showy flowers in branched clusters. The long corolla tube has 5 flaring lobes. Leaves usually opposite and simple. In the Polemonium genus flowers are bell-shaped and leaves are pinnately compound.
Grape 6 Woody, climbing vines with tendrils. Leaves toothed. Flowers in clusters. Fruit a berry with several seeds. Also see 4-petal section.
Grape 6 See 5-petal section
Sedum (Orpine) 5 Low plants, flowers usually have 5 (occasionally 4) petals. Anthers may be prominent. Leaves sessile, may be fleshy and waxy.
Milkweed 5 Flowers often arranged in drooping clusters. Have 5 sweptback petals surrounding a 5-parted central cup. Seeds are attached to flossy tufts. Sap is milky.
St. Johnswort 5 Flowers yellow or orange. Numerous stamens form a bushy center. Leaves and petals often marked by small dots along the margins.
Spurge 5 Petals and sepals absent, but the 5 (occasionally 2) bracts can be petal-like. A small, slender-stalked globular ball extends from the center of some individual flowers.
Wood Sorrel 5 Low, small plants. Leaves clover-like with inversely heart shaped leaflets folded down the center.
Ginseng 5 May be herbs, trees or bushes. Small greenish or whitish flowers in compact clusters. Alternate leaves usually compound.
Geranium 4 Central beak-like structure remains after the petals have fallen. Leaves usually palmately lobed.
Dogbane 4 The small nodding, bell-shaped flowers are white or pink. Milky sap. Slender seed pods containing milkweed-like tufted seeds.
Vervain 3 Tiny white or blue flowers in pencil-like spikes on tall, branched stems. Leaves alternate and toothed.
Waterleaf 3 Usually blue, bell-shaped flowers with prominent, protruding stamens. In the Phacelia genus flowers are on one side of a curled stem, like a Forget-me-not. Leaves large, often palmately or pinnately compound.
Cashew (Sumac) 3 Plants are mostly shrubs with milky or resinous sap. Alternate leaves are simple or compound. Fruit is berry-like.
Wintergreen 3 Small woodland plants with small drooping flowers, usually with 5 sepals and 5 petals. Leaves alternate or whorled, usually evergreen, except in the genus Monotrema, that lacks chlorophyll.
Purslane 3 Have tiny inconspicuous flowers except for Spring beauty, a delicate woodland flower of spring that has a raceme of flowers and long slender, opposite leaves.
Horsechestnut 3 Trees with palmately compound leaves. The large, shown flowers are in upright clusters. Fruit is a large seed in a husk.
Buckthorn 3 See 4-petal section.
Linden 3 Medium to large trees with heart-shaped, fine-toothed leaves. Clusters of fragrant, yellow flowers hang on a stalk partly imbedded in a long, leaf-like bract.
Staff-Tree 2 Climbing, twining vines or trees. Small flowers are single or in clusters. Fruit a berry or capsule.
Cucumber 2 See 6-petal section.
Four O'Clock 2 There is a cup-like structure of bracts holding a calyx with 5 petal-like sepals. Leaves opposite.
Bluebell 2 Flowers may be bell-shaped or flat. Style may be prominent, and stigma is several-lobed. Leaves alternate and undivided.
Carpetweed 1 Local species prostrate, mat forming, whorled leaves. Tiny white flowers. Sap not milky.
Holly 1 Shrubs that have simple, toothed, leathery, often evergreen leaves. Small flowers are solitary or in clusters. Fruit a red berry.
Pokeweed 1 The single species is a large plant with white flowers in racemes, fruit red-stemmed purple berries.
Loosestrife 1 See 6-petal section.
Caper 1 The 4 long, narrow petals are all in the upper half of the bloom. Stamens are even longer than the petals.
Valerian 1 Branches fork repeatedly before ending in clusters of very small flowers. Leaves opposite and sessile.