Penstemon plant named ‘TNPENDV’

Abstract

A new and distinct cultivar of Penstemon plant characterized by dark green leaves, tinted purple with winter temperatures, lavender to violet flowers, short, a compact, upright and well branched habit, attractive deep purple seed heads, and excellent vigor.

Claims

1. A new and distinct cultivar of Penstemon plant substantially as illustrated and described herein.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows the new cultivar as a six-month-old plant growing in the trial field in mid-August in Canby, Oreg.

(2) FIG. 2 shows the dark purple foliage of the new cultivar as a nine-month-old specimen after cold temperatures in the trial field in November in Canby, Oreg.

DETAILED PLANT DESCRIPTION

(3) The following is a detailed description of the new Penstemon cultivar based on observations of eight-month-old specimens grown outside in the trial field in full sun in Canby, Oreg. in August. Canby is Zone 8 on the USDA Hardiness map. Temperatures range from a high of 95 F. in August to an average of 32 F. in January. Normal rainfall in Canby is 42.8 inches per year. The color descriptions are all based on The Royal Horticultural Society Colour Chart, 5.sup.th edition, 2007. Plant: Type.Herbaceous perennial, semi-evergreen (evergreen in USDA Zone 8). Form.Upright, basal clump, with 6 to 8 leafy flowering stems from base. Size.Grows to 50 cm wide and 53 cm tall to top of inflorescence. Crown count number.15. Roots.Fibrous, with many downward growing and a few laterals, ivory in color, Yellow White 158D, roots develop easily from cuttings from the crown. Vigor.Excellent. Cold hardiness.USDA Zone 3. Leaf (basal): Type.Simple. Arrangement.Rosette. Shape.Lanceolate. Venation.Pinnate. Margins.Serrulate. Apex.Acute. Base.Attenuate. Blade size.Grows to 13 cm long and 4.4 cm wide. Surface texture.Both sides glabrous. Petiole.Petiole clasping, to 9.3 cm long and up to 6 mm wide. Leaf color.Topside closest to Green 139A with veins Green 139B, bottom side Green 137C with veins Green 137B, sustained cold temperatures tint leaves Greyed Purple N186B. Leaf (stem): Type.Simple. Habit.Upright. Arrangement.Opposite, clasping. Shape.Lanceolate. Venation.Pinnate, top and bottom Green 137C. Margins.Serrate, sustained cold temperatures tint margins Greyed Purple N186B. Apex.Acute. Base.Attenuate. Blade size.Grows to 9.1 cm long and 3 cm wide. Surface texture.Glabrous on both sides. Petiole.Up to 7 mm, Greyed Purple 187A. Leaf color.Topside Green 137B, bottom side Green 137C. Stem.Upright, 30 cm long and 6 mm to 10 mm wide (at the base), glabrous at base to glandular pubescent toward rachis, internodes grow to 5.3 cm long, Greyed Purple 187A. Inflorescence: Type.Terminal, many flowered, loose thyrse. Number of flowers per inflorescence.75 to 100. Rachis size.15 cm long and 4 cm wide, sparsely pubescent, Greyed Purple 187A. Peduncle.Grows to 7 cm long and 5 mm wide, pubescent, Greyed Purple 187A. Pedicel.Grows to 4 mm long and 1 mm wide, pubescent, Greyed Purple 187A. Bloom period.June to frost in Canby, Oreg. Flower bud: Size.2.6 cm long and to 8 mm wide. Description.Closed tubular. Color.Tips of corolla Purple N78C blending to White NN155B. Flower: Type.Zygomorphic, perfect. Shape.Tubular, bilabiate. Size.Grows to 3.5 cm long and 1.5 cm wide. Corolla description.Grows to 3.2 cm long and 1.5 cm wide; tube is bulbous in the calyx for 5 mm long and 3 mm wide, narrowing for 2 mm, then widening for 2.5 cm and flaring to 1.5 cm wide, 5 lobes, the two smaller top lobes flare back (each 6 mm wide and to 7 mm deep) and two larger lateral lobes curl back slightly (9 mm wide and 8 mm deep), and the lower lobe flares back slightly (7 mm wide and 6 mm deep), lobe margins entire, tips acute; outside glandular pubescent, inside pubescent; outside color bulbous section Purple 76A on top, Purple 76C bottom, inside color lobes and bulbous section White N155B, tube Red Purple 72B with bee tracks Red Purple 72A. Calyx description.5 mm deep and 9 mm wide, 5 lobes, each lobe ovate in shape, 4.5 mm long and 4 mm wide, margins entire, tip acuminate, base cuneate, both sides between Greyed Purple N187A and Greyed Purple 187A, both sides pubescent. Pistil description.1, 2.4 cm long, ovary 7 mm long and 2 mm wide, Green 143C; style 2 cm long and less than 1 mm wide, White NN155C, stigma Purple 77A. Stamen description.5, one sterile without an anther, held within the corolla 2.2 cm long, filaments 2 mm long and White NN155B, anthers 2 mm long, Brown N200B, pollen White NN155C. Pollen.Scarce. Fragrance.None. Lastingness.A flower lasts 5 to 6 days. Fruit: Type.Capsule. Fertility.Fair. Size.10 mm deep and 6 mm wide. Shape.Conical. Color.Greyed Purple 187A. Seed: Shape.Irregular. Size.2 mm long. Color.Black 202A. Pests and diseases: The new cultivar is typical to the genus. No problems have been found in Canby, Oreg.