font settings and languages

Font Size: Large | Normal | Small
Font Face: Verdana | Geneva | Georgia
Languages:

Onosma arenaria

Interesting Facts

[ Back to top ]
 

Description

[ Back to top ]

Family Boraginaceae

Herbs perennial , biennial, or annual , less often lianas, shrubs , or trees , usually bristly or scabrous-pubescent. Leaves simple , exstipulate , alternate, rarely opposite, entire or serrate at margin . Inflorescences often double scorpioid cymes, rarely solitary; bracts present or absent. Flowers bisexual , actinomorphic , rarely zygomorphic. Calyx usually 5-parted or lobed , mostly persistent . Corolla tubular , campanulate , rotate, funnelform , or salverform ; tube appendages 5, rarely more, mostly trapeziform, rarely absent, sometimes a ring of hairs present; limb usually 5-parted; lobes overlapping, rarely twisted in bud. Stamens 5, inserted on corolla tube or rarely at throat , included or rarely exserted; anthers introrse , 2-loculed, usually dorsifixed at base , less often medifixed , dehiscence longitudinal . Nectaries at base of corolla tube or on disc below ovary. Ovary superior, 2-carpellate; locules 2 and each with 2 ovules, or 4 and each with 1 ovule; ovules nearly atropous , semianatropous, or anatropous . Style terminal or gynobasic , branched or not. Gynobase flat, fastigiate , or subulate . Fruit 1-4-seeded drupes or nutlets (mericarps) ; nutlets mostly dry, often ornamented with wings , prickles and/or glochids (stiff bristles with barbed or anchorlike tips ) . Seeds vertical or oblique , coat membranous; embryo straight, less often curved ; cotyledons flat, fleshy .

About 156 genera and 2500 species: temperate and tropical regions , centered in the Mediterranean region; 47 genera and 294 species in China, of which four genera and 156 species are endemic.[1]

Genus Onosma

Herbs biennial or perennial , rarely subshrubs , scabrous . Leaves petiolate or sessile, margin entire. Cymes scorpioid, solitary at stem apex or terminating stems and branches and forming a panicle, usually elongated in fruit, bracteate . Flowers actinomorphic , pedicellate or sessile. Calyx parted to or nearly to base ; lobes 5, linear or linear-lanceolate, equal, usually enlarged after anthesis . Corolla blue, yellow, rarely white or red, tubular-campanulate or retrorse-conical, usually gradually expanded from base upward, rarely abruptly expanded from middle ; throat unappendaged; nectary ringlike or irregularly lobed , pubescent or glabrous ; lobes vertical or recurved, margin dentate. Anthers laterally coherent into a tube or sagittate at base, usually pellucid , emarginate , apex sterile . Style included or slightly exserted; stigma capitate. Gynobase flat. Nutlets 4, erect , ovate-triangular, length and width subequal , adaxially usually ribbed , abaxially slightly convex ; attachment scar basal.

About 145 species: centered in Asia, 29 species in China.[2]

Taxonomy

[ Back to top ]

Notes

An accepted name in the RHS Horticultural Database.

Similar Species

[ Back to top ]

Members of the genus Onosma

ZipcodeZoo has pages for 3 species, subspecies, varieties, forms, and cultivars in this genus:

O. echioides (Onosma) · O. sericea (Yellow Drop) · O. stellulata (Golden Drop)

More Info

[ Back to top ]

Further Reading

[ Back to top ]

Notes

[ Back to top ]

Contributors

Data Sources

Accessed through GBIF Data Portal November 29, 2007:

Identifiers

Footnotes

  1. Gelin Zhu, Harald Riedl & Rudolf V. Kamelin "Boraginaceae". in Flora of China Vol. 16 Page 329. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Onosma". in Flora of China Vol. 16 Page 348. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
Last Revised: 7/21/2012