Kingdom:
Phylum:
Angiosperms
Order:
Ericales
Species:
speciosum
ID:
484585

Status:
valid

Authors:
Rydb.

Source:
ksu

Year:
1901

Citation Micro:
Bull. Torrey Bot. Club 28: 29 (1901)

WFO Identifier:
wfo-0000483917

Common Names

  • Polemonium speciosum
  • Showy Jacob's Ladder
  • Showy Polemonium

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Description

Polemonium speciosum (also called Polemonium speciosa, among many other common names) is a small, evergreen, perennial plant native to Japan and Sakhalin Island. It has a rosette of basal leaves and grows up to 30 cm tall. It is found in moist and shady areas, and in rocky outcrops.

Uses & Benefits

Polemonium speciosum is used as an ornamental plant in gardens and parks. It is also used in traditional medicine for its medicinal properties.

Flower, Seeds and Seedlings

Polemonium speciosum has small, white flowers that are borne on a thin, wiry stem. The seed is small, round and black. The seedlings are thin and wiry with small, round leaves.

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Cultivation and Propagation

Polemonium speciosum is a perennial plant that can be grown from seed or cuttings. It prefers moist, well-drained soil in partial shade and can tolerate temperatures down to -15°C (5°F). Propagation is best done in spring or early summer by division of the clumps or by taking stem cuttings. The plant can also be propagated from seed, which should be sown in a cold frame as soon as it is ripe.

Where to Find Polemonium speciosum

Polemonium speciosum can be found in Japan, in the prefectures of Hokkaido and Aomori.

Polemonium speciosum FAQ

What is the common name of Polemonium speciosum?

Showy Jacob's Ladder

What type of soil does Polemonium speciosum prefer?

Moist, well-drained soil

What is the optimal temperature range for Polemonium speciosum?

50-60°F

Species in the Polemonium genus

Polemonium sachalinense, Polemonium schizanthum, Polemonium speciosum, Polemonium schmidtii, Polemonium pulchellum, Polemonium victoris, Polemonium yezoense, Polemonium kiushianum, Polemonium glabrum, Polemonium nevadense, Polemonium occidentale, Polemonium majus, Polemonium mexicanum, Polemonium caeruleum, Polemonium acutiflorum, Polemonium boreale, Polemonium elegans, Polemonium villosissimum, Polemonium micranthum, Polemonium grandiflorum, Polemonium brandegeei, Polemonium carneum, Polemonium chartaceum, Polemonium flavum, Polemonium foliosissimum, Polemonium pauciflorum, Polemonium pectinatum, Polemonium pulcherrimum, Polemonium reptans, Polemonium van-bruntiae, Polemonium viscosum, Polemonium villosum, Polemonium californicum, Polemonium eximium, Polemonium caucasicum, Polemonium sumushanense, Polemonium chinense, Polemonium hingganicum, Polemonium mellitum, Polemonium eddyense, Polemonium campanulatum,

Species in the Polemoniaceae family

Acanthogilia gloriosa, Aliciella caespitosa, Aliciella formosa, Aliciella haydenii, Aliciella heterostyla, Aliciella humillima, Aliciella hutchinsifolia, Aliciella latifolia, Aliciella leptomeria, Aliciella lottiae, Aliciella mcvickerae, Aliciella micromeria, Aliciella nyensis, Aliciella pentstemonoides, Aliciella pinnatifida, Aliciella ripleyi, Aliciella sedifolia, Aliciella stenothyrsa, Aliciella subacaulis, Aliciella subnuda, Aliciella tenuis, Aliciella triodon, Aliciella monoensis, Aliciella cliffordii, Allophyllum divaricatum, Allophyllum gilioides, Allophyllum glutinosum, Allophyllum integrifolium, Allophyllum nemophilophyllum, Bonplandia geminiflora, Bonplandia linearis, Bryantiella palmeri, Cantua dendritica, Cantua mediamnis, Cantua volcanica, Cantua alutacea, Cantua bicolor, Cantua buxifolia, Cantua candelilla, Cantua coerulea, Cantua cordata, Cantua cuzcoensis, Cantua flexuosa, Cantua glutinosa, Cantua hibrida, Cantua longifolia, Cantua megapotamica, Cantua ovata, Cantua pyrifolia, Cantua quercifolia,