Chiba University Matsudo/Kashiwa Campus Plant Database

Details of genus: Penstemon Schmidel. [150]

genus_ja:

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pub_year:

accepted: Accepted

Family: Plantaginaceae

family_ja: オオバコ

Infra familial classification:

distribution_en: N.America, NE.Asia (1)

description_en: Genus of approximately 250 species of deciduous, semi-evergreen, or evergreen perennials and subshrubs occurring in a variety of habitats, from open plains to subalpine and alpine areas, in North and Central America. Leaves are stalked or stalkless, usually linear to lance-shaped, and borne in opposite pairs or whorls, or sometimes alternately on the upper parts of the shoots. They are grown for their racemes or panicles of tubular, tubular-bell-shaped, or tubular-funnel-shaped, 2-lipped flowers; the upper lip Is usually 2-lobed, the lower lip 3-lobed. Numerous, bushy, free-flowering cultivars have been developed; most are semi-evergreen with persistent basal growth, and produce racemes or panicles of foxglove-like flowers from early summer to mid-autumn. Other leaf and flower characteristics are very variable: in the descriptions below, leaves are defined simply as narrow or large, and flowers as small or large. Narrow leaves are linear-lance-shaped to lance-shaped, to 7cm (3in) long; large leaves are elliptic to narrowly ovate, usually 12cm (5in) or_ more long. Small flowers are 2.5-3cm (1-1 1/4in) long; large flowers are 5-7cm (2-3in) long. Grow larger species and cultivars in a border or as bedding and smaller ones in a rock garden or at the front of a border.

hardiness_en: Fully hardy to half hardy.

cultivation_en:

propagation_en: Sow seed in late winter or spring: sow seed of rock garden plants in containers in a cold frame; sow seed of border perennials at 13-18°C (55-64°F). Take softwood cuttings in early summer or semi-ripe cuttings in midsummer. Divide in spring.

pests_en: May be damaged by slugs and snails, and infested with chrysanthemum eelworm. Powdery mildew may be a problem.

description_ja:

comment:

comment_ja: イワブクロ

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Update Information: Created: 2007-12-06 12:51; Updated: 2022-03-09 15:20

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