Botanical

Name

English Name

1 Deciduous

2 Evergreen

3 Vine

4 Herbaceous

Perennial

Ultimate Height in feet

Color

Time of Bloom

Remarks

Platanus orientalis

Oriental Plane

1

50-60

T. In habit much as the preceding, but with larger, deeper green leaves. A.D.G.

Platycodon grandiflo-rum

Balloon Flower

4

2

Deep blue

July to Oct.

Numerous bell-shaped flowers on erect stalks. Bushy in habit and a very showy perennial. Flowers resemble somewhat the Canterbury Bells. A. G. I.

Platycodon grandiflo-rum var. album

White Balloon Flower

4

2

White

July to Oct.

A variety of the preceding with flowers 1 to 2 inches across. A. G. I.

Platycodon grandiflo-rum var. Mariesi

4

1

Various

July to Oct.

A dwarfer form of the Platycodon, with large flowers, in colors of blue, white and lavender. A.G. I.

Platycodon grandiflora var. semi-plenum

Semi-double Balloon Flower

4

2

Deep blue

July to Oct.

A free-flowering, showy perennial with semi-double flowers produced on erect stems. An excellent border plant. A.G. I.

Podophyllum peltatum

Mandrake or May Apple

4

1 1/2

White

May

Leaves deep green, deeply divided. Fruit yellow, about the size of a plum. Good in the bog or wild-garden. A. F.

Polemonium caeruleum

Jacob's Ladder

4

1 1/2

Deep purple

May & June

A good border plant with clusters of bell-shaped flowers, and handsome divided foliage. A. G.

Polemonium caeruleum var. album

4

1 1/2

White

May & June

A white-flowered variety of the preceding. A.G.

Polemonium reptans

Greek Valerian

4

8 in.

Light blue

April & May

Showy flowers in loose panicles. Good for the rockery. A. G.

Polemonium reptans var. Himalayanum

4

8in.

Purple-magenta

May & June

Fern-like foliage with loose panicles of flowers about 1 inch across. Good for the border or rockery. A. G.

Polemonium humile

4

6 in.

Light blue

•

June

Low and spreading, with attractive divided foliage and showy clusters of bell-shaped flowers. Good in the border or rock-garden. A. G.

Polyanthus

See Primula

•

Polygonatum giganteum

Solomon's Seal

4

4

Green-white

May & June

Good for the wild-garden. Flowers tubular, pendulous and borne on gracefully arching stems. A. F.

Polygonatum multiflo-rum

4

2

Green-white

May & June

Common in old gardens and particularly good in somewhat moist ground. Foliage light green, flowers tubular, resembling the Lily-of-the-Valley. A. F. I.

Polygonum amplexi-caule or P. multiflo-rum

Knot Weed or Joint Weed

4

2

Rose

Sept. & Oct.

A good border plant with foliage which has a tufted habit of growth, and showy flowers in spikes. A. G. I.

Polygonum Baldschu-anicum

3

20

Rose

September

A pretty climbing vine with numerous small flowers in drooping panicles. Good for small trellises. B. C. D. G.