Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



James S. Pringle (except as specified)

Annual, perennial herb
Stem decumbent to erect, < 2 m
Leaves simple, cauline (sometimes also basal), opposite or whorled, entire, sessile or basal ± petioled; stipules 0
Flower bisexual, radial, parts in 4's or 5's, except pistil 1; sepals fused, persistent; petals fused, persistent or deciduous, corolla generally without fringes or scales on inner surface, sinuses between lobes generally unappendaged; stamens epipetalous, alternate corolla lobes; ovary superior, chamber 1, placentas parietal, often intruding
Fruit: capsule, 2-valved
Seeds many
Genera in family: ± 80 genera, 900 species: worldwide; some cultivated (Eustoma , Exacum , Gentiana )
Reference: [Wood & Weaver 1982 J Arnold Arbor 63:441–487]


Perennial (dying after flowering in S. albomarginata , S. fastigiata , S. parryi , S. puberulenta , S. radiata ; non-flower rosettes preceding flower-stems in these species, accompanying flower-stems in others)
Leaves: basal ± petioled; cauline < basal, generally whorled or opposite
Inflorescence: cyme or panicle of dense clusters
Flower: parts in 4's (generally 5's in S. perennis, many species outside CA); calyx fused only near base, lobes lanceolate; corolla rotate, rarely bell-shaped, sometimes with fringed ridges or scales between stamen bases, lobes > tube, sinus appendages 0, nectary pits prominent, 1–2 per lobe, pit margin fringed; ovary sessile, style short, persistent, stigma 2-branched
Species in genus: ± 120 species: temp North America, Eurasia, Africa
Etymology: (E. Sweert, Dutch herbalist, born 1552)
Reference: [St. John 1941 Amer Midl Naturalist 21:1–29]
Frasera sometimes segregated.

previous taxon | next taxon
bioregional map for SWERTIA being generated

Retrieve Jepson Interchange Index to Plant Names entry for Swertia
Retrieve dichotomous key for Swertia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California