=False Heather, Hudsonia tomentosa.=

2b. Leaves spreading; flowers 15-30 mm. wide (3-6 dm. high)
(Frostweed) --3.

3a. Petal-bearing flowers solitary
=Frostweed, Helianthemum canadense.=

3b. Petal-bearing flowers few, racemose
=Frostweed, Helianthemum majus.=

4a. Stem-leaves linear, 4 or more times as long as wide --5.

4b. Stem-leaves oblong or elliptical, about 3 times as long as wide
(2-6 dm. tall) --8.

5a. Plant pale with dense appressed pubescence (2-4 dm. high)
=Pinweed, Lechea stricta.=

5b. Plant green, pubescence sparse or none --6.

6a. Leaves thread-like, seldom exceeding 1 mm. in width (1-3 dm.
tall) =Pinweed, Lechea tenuifolia.=

6b. Leaves 1-5 mm. wide (2-6 dm. high) --7.

7a. Leaves on the basal shoots narrowly lanceolate
=Pinweed, Lechea intermedia.=

7b. Leaves on the basal shoots oblong-elliptic, about twice as long as
wide =Pinweed, Lechea racemulosa.=

8a. Pubescence of spreading hairs =Pinweed, Lechea villosa.=

8b. Pubescence of appressed hairs =Pinweed, Lechea minor.=

VIOLACEAE, the Violet Family

Herbs with simple, alternate or basal leaves, and conspicuous irregular
flowers with a spur (except in the first species); sepals, petals, and
stamens each 5; ovary 1-celled.

1a. Flowers regular or nearly so, greenish-white, axillary; erect plant
with leafy stem (3-5 dm. high; spring)
=Green Violet, Hybanthus concolor.=

1b. Flowers irregular, blue, yellow, or white, conspicuous (Violet) --2.

2a. Plant stemless, the flowers all on leafless stalks and the
leaves all basal (spring or early summer) --3.

2b. Stems leafy (spring and summer) --17.

3a. Petals yellow =Round-leaved Violet, Viola rotundifolia.=

3b. Petals blue, violet, or white --4.

4a. Principal leaves at time of flowering deeply lobed --5.

4b. Leaves oblong, ovate, or triangular, not narrowed to the
petiole, and frequently sharply toothed or incised near the
base --7.

4c. Leaves narrowly lanceolate, tapering to the base