Viola umbraticola var. glaberrima

W. Becker

Repert. Spec. Nov. Regni Veg. 20: 7. 1924.

Common names: Ponderosa violet
Treatment appears in FNA Volume 6. Treatment on page 161. Mentioned on page 162.

Plants perennial, acaulescent, not stoloniferous, 5–11 cm; rhizome thick, subligneous. Leaves basal, 3–14, prostrate to ascending; stipules linearlanceolate, margins laciniate, apex long-acuminate; petiole 1–7.8 cm, puberulent; blade unlobed, ovate to oblong, 1–3.8 × 1–3.6 cm, base truncate to cordate, margins crenate to serrate, eciliate, apex obtuse to acute, surfaces glabrous. Peduncles 3–9 cm, glabrous. Flowers: sepals linearlanceolate, margins eciliate, auricles 1–1.5 mm; petals blue to violet on both surfaces, white at base, lower 3 dark violet-veined, lateral 2 bearded, lowest 9–16 mm, spur white, gibbous to elongated, 2.5–4 mm, tip straight or hooked up; style head bearded; cleistogamous flowers unknown. Capsules ellipsoid, 4–11 mm, glabrous. Seeds unknown.


Phenology: Flowering May–Aug.
Habitat: Mixed oak and pine and coniferous forests, bases of shrubs or pine trees in dense duff
Elevation: 1600–2400 m

Distribution

V6 293-distribution-map.jpg

Ariz., Mexico (Chihuahua), Mexico (Durango), Mexico (Sonora)

Discussion

The mature rhizomes of var. glaberrima occur to 15 cm beneath the soil surface and eventually become lignified and woody. Variety glaberrima differs from var. umbraticola in being glabrous except for hairy stipule apices.

In Arizona, var. glaberrima is known from the higher elevations of the Chiricahua, Santa Catalina, and Santa Rita mountain ranges. It was first collected in the United States by J. J. Thornber in 1913 in the Santa Catalina Mountains, Pima County, Arizona. Viola umbraticola has no close relatives in the United States or in Mexico (M. S. Baker 1949).

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

obtuse;acute +
not +  and prominent +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
R. John Little +  and Landon E. McKinney† +
W. Becker +
truncate +  and cordate +
overlapping +
1 cm10 mm <br />0.01 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
ovate +  and oblong +
1 cm10 mm <br />0.01 m <br /> (3.6 cm36 mm <br />0.036 m <br />) +
muriculate +
ellipsoid +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Ponderosa violet +
Ariz. +, Mexico (Chihuahua) +, Mexico (Durango) +  and Mexico (Sonora) +
ovoid +  and spheroid +
1600–2400 m +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
lateral +  and upper +
2 +  and produced in summer , apetalous or petals +
cleistogamous +
3-valved +  and capsular +
loculicidal +
Mixed oak and pine and coniferous forests, bases of shrubs or pine trees in dense duff +
stoloniferous +, rhizomatous +, taprooted +  and simple +
scattered +  and concentrated +
variously--shaped +
1(-3)[-5]-flowered +
petiolate +  and simple +
prostrate;ascending +
unlobed +
not narrowed +
crenate +  and serrate +
syngenesious +
crassinucellate +  and bitegmic +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
dark violet-veined +, white +, blue +  and violet +
lowest +, lateral +  and lower +
2 +  and 3 +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1 cm10 mm <br />0.01 m <br /> (7.8 cm78 mm <br />0.078 m <br />) +
Flowering May–Aug. +
[2-]3[-5]-carpellate +
Repert. Spec. Nov. Regni Veg. +
deep-seated +
subligneous +
ovoid;spherical +
subequal +
longitudinal +
acaulescent +  and caulescent +
elongated +
gibbous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
adherent +, not adherent +  and distinct +
leafy +  and simple +
shallow +
deciduous +
prostrate +  and decumbent +
vertical;horizontal;erect;ascending +
subligneous +  and fleshy +
hollow +  and solid +
beardless +  and bearded +
enlarged +
Chrysion +, Crocion +  and Lophion +
Viola umbraticola var. glaberrima +
Viola umbraticola +
variety +
straight +
hooked +
not stoloniferous +  and acaulescent +
prostrate +  and erect +
hairy +  and glabrous +