Chiba University Matsudo/Kashiwa Campus Plant Database

Details of genus: Polemonium L. [742]

genus_ja: ハナシノブ

genus_en: Jacob’s ladder

# spp.: 37

pub_year: 1753

accepted: Accepted

Family: Polemoniaceae

family_ja: ハナシノブ

Infra familial classification: Subfamily Polemonioideae

distribution_en: Temp. Northern Hemisphere to Texas, S. South America

description_en: Genus of about 25 species of deciduous, clump-forming or occasionally rhizomatous perennials and annuals, found in stony, arctic or alpine soils, often by streams, or in damp meadows, woodland, or scrub, in Europe, Asia, North America, and Central America. Most have basal clumps of unequally pinnate leaves, usually with numerous leaflets, and erect or decumbent stems bearing smaller leaves. They are grown for their spring and summer flowers, which are bell-shaped, saucer-shaped, narrowly tubular, or funnel-shaped and spreading at the mouths; they are usually white or blue, sometimes purple, pink, or yellow, and either solitary or in terminal or axillary cymes. Grow taller species in a border or wild garden, the smaller, alpine species in a rock garden, scree bed, or alpine house. P. caeruleum grows well in grass. P. brandegeei and P. pauciflorum are usually short-lived.

hardiness_en: Fully hardy.

cultivation_en:

propagation_en: Sow seed in containers in a cold frame in autumn or spring, or divide in spring.

pests_en: Powdery mildew may be a problem. P. brandegeei. Clump-forming, perennial bearing mainly basal, sticky, pinnate leaves, to 10cm (4in) long, with many lance-shaped leaflets, each to 1.5cm (1/2in) long. In early summer, upright stems bear short, terminal cymes

description_ja:

comment: N. temperate

comment_ja:

type_species: Polemonium caeruleum

Phylogenetic definition:

Update Information: Created: 2007-12-06 12:51; Updated: 2023-09-27 11:34 by hkokubun@mac.com

family: