ClipArt ETC
Individual leaflets simple.

Proserpinaca

Individual leaflets simple.

Base of petiole not expanded.

Proserpinaca

Base of petiole not expanded.

Flowers sessile, in the axils of the leaves; fruit a single 3-angled nutlet.

Proserpinaca

Flowers sessile, in the axils of the leaves; fruit a single 3-angled nutlet.

Spikelets with more than 2 scales enclosing achenes; no periath-bristles present.

Psilocarya

Spikelets with more than 2 scales enclosing achenes; no periath-bristles present.

Fruit flattened laterally; fruit not winged.

Ptilimnium

Fruit flattened laterally; fruit not winged.

Leaflets narrowly linear, untoothed; plants annual.

Ptilimnium

Leaflets narrowly linear, untoothed; plants annual.

Covered with hairs, often short and downy.

Pubescent

Covered with hairs, often short and downy.

With small dots, whichcanoften be seen only with a lens.

Punctate

With small dots, whichcanoften be seen only with a lens.

A flower cluster with the flowers stalked and comming off a commonand more or less elongated axis.

Raceme

A flower cluster with the flowers stalked and comming off a commonand more or less elongated axis.

Leaflets usually three, no more than five.

Ranunculus

Leaflets usually three, no more than five.

Base of petiole expanded; plants under 4 dm tall.

Ranunculus

Base of petiole expanded; plants under 4 dm tall.

Flowers stalked; fruit a group of several, scarcely angled, small nutlets.

Ranunculus

Flowers stalked; fruit a group of several, scarcely angled, small nutlets.

Submerged leaves alternate or irregularly borne.

Ranuneulus

Submerged leaves alternate or irregularly borne.

Kidney shaped.

Reniform

Kidney shaped.

With a network like surface.

Reticulate

With a network like surface.

Appearing as if rolled back from the margins.

Revolute

Appearing as if rolled back from the margins.

Leaves sessile or very short petioled; flowers showy.

Rhexia

Leaves sessile or very short petioled; flowers showy.

Spikelets with only 1 or 2 scales enclosing acenes; perianth-bristles usually present.

Rhynchospora

Spikelets with only 1 or 2 scales enclosing acenes; perianth-bristles usually present.

Divisions of plant body fine and many; plant body usualy floating below the surface.

Riccia

Divisions of plant body fine and many; plant body usualy floating below the surface.

Divisions of plant body coarse, two lobed; floating on surface.

Ricciocarpus

Divisions of plant body coarse, two lobed; floating on surface.

Flowers yellow.

Rorippa

Flowers yellow.

Leaves with central mid-vein and smaller veins branching from this.

Rorippa

Leaves with central mid-vein and smaller veins branching from this.

With the leaves clustered symmetrically around the base of the stem or scape.

Rosette

With the leaves clustered symmetrically around the base of the stem or scape.

Flowers with small appendages between the sepals.

Rotala

Flowers with small appendages between the sepals.

Plant with broad leaves, many basal; flowers stalked and drooping.

Rumex

Plant with broad leaves, many basal; flowers stalked and drooping.

Leaf-base apparently inflated.

Ruppia

Leaf-base apparently inflated.

Flowers white, or, if pink, with a yellow or green eye in the center.

Sabatia

Flowers white, or, if pink, with a yellow or green eye in the center.

Spikelets inflated or gibbous at base.

Sacciolepis

Spikelets inflated or gibbous at base.

Leaves from base of scape bearing evident white flowers in racemes; roots without crss-constrictions.

Sagittaria

Leaves from base of scape bearing evident white flowers in racemes; roots without crss-constrictions.

lowest flowers with only carpels, or with only stamens.

Sagittaria

lowest flowers with only carpels, or with only stamens.

Like an arrowhead, with the lobes turned downward.

Sagittate

Like an arrowhead, with the lobes turned downward.

Leaves over four times as long as broad.

Salix

Leaves over four times as long as broad.

Leaves not over twice as long as broad.

Samalus

Leaves not over twice as long as broad.

Stems with no sheaths; flowers white, fragrant.

Saururus

Stems with no sheaths; flowers white, fragrant.

Flwers or fruits hidden by overlapping scales.

Scirpus

Flwers or fruits hidden by overlapping scales.

Style not swollen as base.

Scirpus

Style not swollen as base.

Achene exposed.

Scleria

Achene exposed.

calyx of flower bearing a crest above.

Scutellaria

calyx of flower bearing a crest above.

Selerolepis

Selerolepis

Selerolepis

A member of the outermost circle of flower parts.

Sepal

A member of the outermost circle of flower parts.

Toothed like a saw.

Serrate

Toothed like a saw.

Spikelets spineless (awnless) but subtended by several bristles; panicle often nodding.

Setaria

Spikelets spineless (awnless) but subtended by several bristles; panicle often nodding.

A shrub with leaves with expanded blades.

Shrub

A shrub with leaves with expanded blades.

Shrub

Shrub

Shrub

A cleft or recess between two lobes.

Sinus

A cleft or recess between two lobes.

Leaves with several veins running from base to apex; stems often thorny.

Smilax

Leaves with several veins running from base to apex; stems often thorny.

Sheaths narrowed to blade; leaves with keels.

Sparganium

Sheaths narrowed to blade; leaves with keels.

Spikelets 6mm long or more; grass growing in large clumps.

Spartina

Spikelets 6mm long or more; grass growing in large clumps.

Leaf-like structure more or less enclosing a fleshy inflorescence, particularly in the Araceae.

Spathe

Leaf-like structure more or less enclosing a fleshy inflorescence, particularly in the Araceae.

Pertains to shape.

Spatulate

Pertains to shape.

A flower cluster with flowers sessile along a common more or less elongated axis.

Spike

A flower cluster with flowers sessile along a common more or less elongated axis.

Plant body conspicuously nerved, roolets two to several per disk.

Spirodela

Plant body conspicuously nerved, roolets two to several per disk.

A hollow sac-like or tubular extension of some part of a flower.

Spur

A hollow sac-like or tubular extension of some part of a flower.

The pollen bearing organ of the flower.

Stamen

The pollen bearing organ of the flower.

The sticky portion of the pistil, usually terminal, upon which the pollen is deposited.

Stigma

The sticky portion of the pistil, usually terminal, upon which the pollen is deposited.

Low, brittle shrub with wood lighter than cork; green parts with a milky sap.

Stillingia

Low, brittle shrub with wood lighter than cork; green parts with a milky sap.

An appendage at the base of the petiole of a leaf; normally occuring in pairs.

Stipule

An appendage at the base of the petiole of a leaf; normally occuring in pairs.

Somewhat heart shaped.

Subcordate

Somewhat heart shaped.

Shaped like an awl.

subulate

Shaped like an awl.

Plants white-powdery above; plants extremely large, usually over 1 m.

Thalia

Plants white-powdery above; plants extremely large, usually over 1 m.