Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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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.


S. perennis L.

Plant 1–5 dm, glabrous
Stem generally 1; rosettes 1–few
Leaves: basal 3–16 cm, 12–30 mm wide, spoon-shaped-obovate, tips obtuse; cauline opposite or some alternate, elliptic-oblanceolate, tips subacute
Inflorescence open; pedicels 2–30(60) mm
Flower parts in 4's or 5's; calyx 4–8 mm; corolla 7–13 mm, with a low, ± fringed ridge between stamen bases, bluish white to violet-blue, veins darker, lobes lance-oblong, acute; nectary pits 2 per corolla lobe, round
Chromosomes: 2n=28
Ecology: Wet meadows, bogs
Elevation: 2300–3200 m.
Bioregional distribution: s High Sierra Nevada
Distribution outside California: Wallowa Mtns of Oregon, Rocky Mtns of Colorado to Alaska, Eurasia

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bioregional map for SWERTIA%20perennis being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Swertia perennis
Retrieve dichotomous key for Swertia
Overlay Consortium of California Herbaria specimen data by county on this map
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