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Gesneria (Conrad Gesner, Zurich, 1516-1565, celebrated naturalist, and considered to be the originator of the idea of genus in taxonomy). Gesneriaceae. Greenhouse and hothouse plants with showy tubular flowers. Sometimes written Gesnera.

Gesneria (Conrad Gesner, Zurich, 1516-1565, celebrated naturalist, and considered to be the originator of the idea of genus in taxonomy). Gesneriaceae. Greenhouse and hothouse plants with showy tubular flowers. Sometimes written Gesnera.

Low perennials, sometimes shrubs, with simple, opposite lvs. and showy tubular fls. in terminal short panicles or fascicles: calyx campanulate, 5-parted; corolla long, straight or curved, more or less ventricose, the base often distinctly swollen or gibbous, the limb mostly shallow-toothed and nearly regular or bilabiate; stamens 4, didynamous (in pairs under the upper lip); style 1, long; glands on the disk in the fl.—Species upward of 40. in the American tropics. Often tuberous plants; allied to Achimenes, Gloxinia, Isoloma and Streptocarpus. Some of the gesnerias of the trade belong to Niegelia, which differs, amongst other things, in having an annular or ringed disk rather than a disk of distinct glands. There is considerable variation of opinion as to the limits of Gesneria. In this account, the genus is held to include Pentarhaphia, Duchartrea, Codonoraphia, Conradia, Ophianthe, Synanthera. The plants of this group are probably considerably modified by crossing and breeding. The catalogue name G. hybrida probably covers some of these forms.

Low perennials, sometimes shrubs, with simple, opposite lvs. and showy tubular fls. in terminal short panicles or fascicles: calyx campanulate, 5-parted; corolla long, straight or curved, more or less ventricose, the base often distinctly swollen or gibbous, the limb mostly shallow-toothed and nearly regular or bilabiate; stamens 4, didynamous (in pairs under the upper lip); style 1, long; glands on the disk in the fl.—Species upward of 40. in the American tropics. Often tuberous plants; allied to Achimenes, Gloxinia, Isoloma and Streptocarpus. Some of the gesnerias of the trade belong to Niegelia, which differs, amongst other things, in having an annular or ringed disk rather than a disk of distinct glands. There is considerable variation of opinion as to the limits of Gesneria. In this account, the genus is held to include Pentarhaphia, Duchartrea, Codonoraphia, Conradia, Ophianthe, Synanthera. The plants of this group are probably considerably modified by crossing and breeding. The catalogue name G. hybrida probably covers some of these forms.

G. amabilis, Hort.= Naegelia.—G. cinnabarina, Lind.=Naegelia. —G. guatemalensis, Hort., "a free grower and bloomer, fls. orange," was once offered.—G. jasminiflora, Hort., "fls. of the purest white, freely produced, beautiful," once offered.—G. oblonga, Hort., fls. orange.—G. oblongata, Hort., is probably the same and is very likely an Isoloma.-G. reginae, Hort. Exhibited abroad: lvs. green and velvety, the midrib and main veins white: fls. bluish purple.— G. robusta, Hort.. "vermilion, beautifully spotted and tigered." —G. seemannii, Hook.=Isolomu.—G. zeorina, Paxt.=Naegelia.

G. amabilis, Hort.(syn. Naegelia).—G. cinnabarina, Lind. (syn. Naegelia). —G. guatemalensis, Hort., "a free grower and bloomer, fls. orange," was once offered.—G. jasminiflora, Hort., "fls. of the purest white, freely produced, beautiful," once offered.—G. oblonga, Hort., fls. orange.—G. oblongata, Hort., is probably the same and is very likely an Isoloma.-G. reginae, Hort. Exhibited abroad: lvs. green and velvety, the midrib and main veins white: fls. bluish purple.— G. robusta, Hort.. "vermilion, beautifully spotted and tigered." —G. seemannii, Hook. (syn. Isolomu).—G. zeorina, Paxt. (syn. Naegelia).

 

L. H. B.

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