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pioneer violet, smooth yellow violet, stream or smooth yellow or yellow wood or wood or smooth yellow woodland violet, stream violet, violette glabre, yellow wood violet

darkwoods violet, evergreen yellow violet, round-leaf or round-leaf wood or western round-leaf or evergreen violet, round-leaf violet, violette orbiculaire

Habit Plants perennial, caulescent, not stoloniferous, 3–38 cm. Plants perennial, caulescent, not stoloniferous, 5–9 cm.
Stems

1–3, erect or prostrate, leafless proximally, leafy distally, glabrous or finely puberulent, on caudex from fleshy rhizome.

1–5, prostrate or erect, leafy proximally and distally, usually glabrous, from current and/or previous year’s growth, on usually vertical, fleshy rhizome.

Leaves

basal and cauline;

basal: 0–4(–7);

stipules ovate to obovate, margins entire, crenate, or serrate, usually glandular, apex acute to obtuse;

petiole 7–27.5 cm, glabrous or puberulent;

blade usually reniform to ovate, sometimes orbiculate, 3.3–8.5 × 2–9.3 cm, base cordate, margins crenate to serrate, ciliate or eciliate, apex acute to obtuse, mucronulate, surfaces glabrous or finely puberulent;

cauline similar to basal except: usually restricted to distal ends of naked stems;

stipules ovate to oblong, margins erose or subserrate, often glandular, apex acute to acuminate;

petiole 0.2–2.9 cm, glabrous or finely puberulent;

blade ovate to deltate, 1.4–5.7 × 0.8–4.7 cm, base cordate to truncate, margins crenate to ± serrate, ciliate (sometimes limited to proximal half), apex acute.

basal and cauline;

basal: 3–11;

stipules deltate to lanceolate, margins entire, apex acute to acuminate;

petiole 2.1–10.5 cm, glabrous or pubescent;

blade usually orbiculate to broadly ovate, sometimes reniform, 1.4–5.3 × 1.4–5.3 cm, base cordate, margins crenate to serrulate-crenulate, eciliate or sparingly ciliate, apex usually obtuse, rarely acute, abaxial surface usually glabrous, adaxial surface sparsely pubescent;

cauline similar to basal except: stipules lanceolate to ovate, margins usually entire, ciliate;

petiole 0.7–1 cm, glabrous or pubescent;

blade 1.2–2 × 1.1–1.4 cm.

Peduncles

2–8 cm, glabrous or pubescent.

2.7–5.6 cm, glabrous.

Flowers

sepals linear-lanceolate, margins eciliate, auricles 0.5–1 mm;

petals deep lemon-yellow on both surfaces, lower 3 and sometimes upper 2 brownish purple-veined, lateral 2 bearded, lowest 6–18 mm, spur yellow to greenish, gibbous, 0.5–2 mm;

style head bearded; cleistogamous flowers axillary.

sepals narrow to broadly lanceolate, margins eciliate, auricles 0.5–1.5 mm;

upper 2 and lateral 2 petals deep lemon-yellow on both surfaces, lower 3 and sometimes upper 2 brownish purple-veined, lateral 2 usually bearded, lowest 8–17 mm, spur usually yellow, sometimes whitish, gibbous, 1.5–2.5 mm;

style head bearded; cleistogamous flowers axillary.

Capsules

ovoid to ellipsoid, 7–13 mm, glabrous.

ellipsoid, 6–8 mm, glabrous.

Seeds

light to dark brown, shiny, 2–2.2 mm.

light to dark brown, sometimes mottled with white, 2–2.3 mm.

2n

= 24.

= 24.

Viola glabella

Viola orbiculata

Phenology Flowering Mar–Aug. Flowering May–Aug.
Habitat Damp, wet, or shady places in forests, stream banks Alpine and montane slopes, moist montane coniferous forests, canyons, meadows, lake margins
Elevation 0–2600 m (0–8500 ft) 700–1700 m (2300–5600 ft)
Distribution
from FNA
AK; CA; ID; MT; OR; WA; AB; BC; Asia
[WildflowerSearch map]
[BONAP county map]
from FNA
ID; MT; OR; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Viola glabella is similar in overall appearance to V. pubescens. The cauline leaves are sometimes described as appearing only near the apex of the stem (P. A. Munz 1959), but often a leaf occurs from a node on the stem below the apex.

Viola californica was described from collections made in Humboldt and Trinity counties, California, and may have arisen as a hybrid between V. glabella and V. lobata var. integrifolia. It is apparently limited to Abies concolor forests above 1520 m (M. S. Baker 1953). Study of V. californica is needed to determine if taxonomic recognition is warranted.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

During winter, the basal leaves of Viola orbiculata are appressed to the ground under the weight of snow. The leaves overwinter and are often partly or entirely green after the snow has melted. Mature plants possess 3–11 basal leaves, some derived from previous years and others from the current year’s growth. Occasional plants are found with short, thin stems rooted at the tip and producing a rosette of leaves and stems, showing the close relationship with V. sempervirens.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 6, p. 131. FNA vol. 6, p. 141.
Parent taxa Violaceae > Viola Violaceae > Viola
Sibling taxa
V. adunca, V. affinis, V. arvensis, V. bakeri, V. beckwithii, V. bicolor, V. biflora, V. blanda, V. brittoniana, V. canadensis, V. canina, V. charlestonensis, V. clauseniana, V. cucullata, V. cuneata, V. douglasii, V. egglestonii, V. epipsila, V. flettii, V. frank-smithii, V. guadalupensis, V. hallii, V. hastata, V. hirsutula, V. howellii, V. japonica, V. labradorica, V. lanceolata, V. langsdorffii, V. lithion, V. lobata, V. macloskeyi, V. missouriensis, V. nephrophylla, V. novae-angliae, V. nuttallii, V. ocellata, V. odorata, V. orbiculata, V. palmata, V. palustris, V. pedata, V. pedatifida, V. pedunculata, V. pinetorum, V. praemorsa, V. primulifolia, V. prionantha, V. pubescens, V. purpurea, V. quercetorum, V. renifolia, V. riviniana, V. rostrata, V. rotundifolia, V. sagittata, V. selkirkii, V. sempervirens, V. septemloba, V. sheltonii, V. sororia, V. striata, V. subsinuata, V. tomentosa, V. tricolor, V. trinervata, V. tripartita, V. umbraticola, V. utahensis, V. vallicola, V. villosa, V. walteri
V. adunca, V. affinis, V. arvensis, V. bakeri, V. beckwithii, V. bicolor, V. biflora, V. blanda, V. brittoniana, V. canadensis, V. canina, V. charlestonensis, V. clauseniana, V. cucullata, V. cuneata, V. douglasii, V. egglestonii, V. epipsila, V. flettii, V. frank-smithii, V. glabella, V. guadalupensis, V. hallii, V. hastata, V. hirsutula, V. howellii, V. japonica, V. labradorica, V. lanceolata, V. langsdorffii, V. lithion, V. lobata, V. macloskeyi, V. missouriensis, V. nephrophylla, V. novae-angliae, V. nuttallii, V. ocellata, V. odorata, V. palmata, V. palustris, V. pedata, V. pedatifida, V. pedunculata, V. pinetorum, V. praemorsa, V. primulifolia, V. prionantha, V. pubescens, V. purpurea, V. quercetorum, V. renifolia, V. riviniana, V. rostrata, V. rotundifolia, V. sagittata, V. selkirkii, V. sempervirens, V. septemloba, V. sheltonii, V. sororia, V. striata, V. subsinuata, V. tomentosa, V. tricolor, V. trinervata, V. tripartita, V. umbraticola, V. utahensis, V. vallicola, V. villosa, V. walteri
Synonyms V. californica, V. canadensis var. sitchensis, V. glabella var. remotifolia V. sarmentosa var. orbiculata, V. sempervirens var. orbiculata
Name authority Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 142. (1838) (A. Gary) Geyer ex B. D. Jackson: in B. D. Jackson et al., Index Kew. 2(4): 1208. (1895)
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