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.



Dale W. McNeal, except as specified

Perennial to trees, from membranous bulb, fibrous corm, scaly rhizome, or erect caudex
Stem generally underground
Leaves generally basal, often withering early, alternate, generally ± linear
Inflorescence various, generally bracted
Flower generally bisexual, generally radial; perianth often showy, segments generally 6 in two petal-like whorls (outer sometimes sepal-like), free or fused at base; stamens 6 (or 3 + generally 3 ± petal-like staminodes), filaments sometimes attached to perianth or fused into a tube or crown; ovary superior or inferior, chambers 3, placentas generally axile, style generally 1, stigmas generally 3
Fruit: generally capsule, loculicidal or septicidal (berry or nut)
Genera in family: ± 300 genera, 4600 species: especially ± dry temp and subtropical; many cultivated for ornamental or food; some TOXIC. Here includes genera sometimes treated in Agavaceae, Amaryllidaceae, and other families.



Perennial; rhizomes long, horizontal
Stem simple or branched
Leaves alternate, sessile or clasping, oblong to ovate, acute to acuminate
Inflorescence: flowers 1–2 on slender, twisted peduncles that are fused to stem for 1 internode (and thus appear to originate opposite the leaf above their actual origin)
Flower bell- to saucer-shaped; perianth parts 6, petal-like, outer flat, inner ± keeled, slightly narrower; stamens 6, filaments flat, anthers abruptly tipped; ovary superior, chambers 3, style 1, entire or 3-lobed
Fruit: berry, greenish to dark red
Seeds 3–15, elliptic, grooved or wrinkled
Species in genus: 7 species: North America, Eurasia
Etymology: (Greek: twisted foot, from peduncles)


S. amplexifolius (L.) DC. var. americanus Schult.

Rhizome thick; roots thick, fibrous
Stem 30–100 cm, repeatedly branched, glabrous to densely hairy
Leaf 5–15 cm, 2–5 cm wide, entire or minutely dentate, cordate-clasping, acuminate, ± glaucous below
Flower 9–15 mm, bell-shaped; perianth parts narrowly oblong-lanceolate, spreading to ± recurved at tips, white, tinged (yellow-)green, inner clasping stamens; stamens 6, outer filaments ± 1 mm, inner 2–3 mm; style 4–5 mm, thick, ± entire
Fruit 10–15 mm, yellow or red
Seeds many, ± 3 mm, grooved
Chromosomes: n=16
Ecology: Moist, shaded areas
Elevation: 250–1700 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range
Distribution outside California: to Alaska, c N.America
Synonyms: var. denticulatus Fassett
Horticultural information: SHD, WET, DRN: 4, 5, 6, 7, 15, 16, 17; DFCLT.

previous taxon | next taxon
bioregional map for STREPTOPUS%20amplexifolius%20var.%20americanus being generated

Retrieve Jepson Interchange Index to Plant Names entry for Streptopus amplexifolius var. americanus
Retrieve dichotomous key for Streptopus
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