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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GENTIANACEAE

GENTIAN FAMILY

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]

SWERTIA

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.

Native

S. tubulosa (Coville) Jeps.

Plant (0.6)2–11 dm, glabrous
Stem generally 1; rosettes 0–few
Leaves white-margined, curving down toward tip; basal 2–9 cm, 3–10(15) mm wide, oblanceolate, tips abruptly pointed; cauline whorled, upper linear-oblong, tips acute
Inflorescence elongate, ± continuous above; pedicels 2–25 mm
Flower: calyx 6–11 mm; corolla 8–13 mm, bell-shaped, without ridges or scales between stamen bases, white to pale blue, veins darker, lobes elliptic-oblong to obovate, short-acuminate; nectary pit 1 per corolla lobe, ovate, margin extension tubular below, 2-lobed, fringed above
Ecology: Open pine woodlands
Elevation: 1800–2700 m.
Bioregional distribution: s Sierra Nevada
Synonyms: Frasera t. Coville

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bioregional map for SWERTIA%20tubulosa being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Swertia tubulosa
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