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| In cultivation, the best known is L. fruticosum, a rock-garden trailer, which bears numerous leafy spikes of blue flowers, each about ½ inch across, from early summer to autumn. L. purpureo-caeruleum is also an old garden plant. The common gromwell, L. officinale, is rarely cultivated as a medicinal herb. Others are procurable from dealers in native plants. Seeds of the gromwell and the western species are procurable, and plants of the other kinds from dealers in rock-garden plants. L. fruticosum is said to be propagated only by cuttings of the previous year's wood; L. multiflorum by cuttings of young shoots. The kinds with red roots yield a dye. L. arvense is an annual or biennial introduced weed; but most of the species (and those cultivated) are perennial. The best known garden kinds are European, but the American species are deserving of greater attention. | | In cultivation, the best known is L. fruticosum, a rock-garden trailer, which bears numerous leafy spikes of blue flowers, each about ½ inch across, from early summer to autumn. L. purpureo-caeruleum is also an old garden plant. The common gromwell, L. officinale, is rarely cultivated as a medicinal herb. Others are procurable from dealers in native plants. Seeds of the gromwell and the western species are procurable, and plants of the other kinds from dealers in rock-garden plants. L. fruticosum is said to be propagated only by cuttings of the previous year's wood; L. multiflorum by cuttings of young shoots. The kinds with red roots yield a dye. L. arvense is an annual or biennial introduced weed; but most of the species (and those cultivated) are perennial. The best known garden kinds are European, but the American species are deserving of greater attention. |
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| + | The garden names of Lithospermum are confused and need to be re-studied. L. coelestinum, Hort., is described as "a most desirable low-growing plant for the rockery," with pretty blue fls. in June. Probably Moltkia caerulea.—L. froebellii, Hort., is said to be "a dwarf compact plant with rosemary-like lvs. and deep blue fls. on erect sts. about 9 in. high."—L. graminfolium Viv.-Moltkia graminifolia.—L. intermedifolium, Hort., is "a pretty dwarf shrubby plant with pale blue fls."—L. intermedium, Hort., perhaps the same as the last, is "a pretty dwarf shrubby species, with fls. a lovely shade of blue." Somewhat shrubby, 8-10 in. high: lvs. narrow and slightly hoary: fls. tubular, drooping. G. 34:857. Probably these are Moltkias.—L. petraeum, A. DC.—Moltkia.—L. rosmarinifolium, Tenore. Evergreen, from Italy and Greece, 1-2 ft.: lvs. narrow, 1 in. or more long: fls. bright blue, striped white about ¼in. diam. Gn.W. 22:139. |
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