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Dale W. McNeal, except as noted

Perennial herb from membranous bulb or scaly rhizome. Stem: underground or erect, branched or not. Leaf: basal or cauline, alternate, subopposite, or whorled. Inflorescence: raceme, panicle, ± umbel-like or not. Flower: perianth parts 6 in 2 generally petal-like whorls, often showy; stamens 3 or 6, filaments free or ± fused to perianth, anthers attached at base or near middle; ovary superior or ± so, style 1, entire or 3-lobed. Fruit: capsule or berry. Seed: 3–many, flat or angled, brown to black.
16 genera, 635 species: northern temperate. Users strongly encouraged to protect plants by working around need to see underground parts in using keys, e.g., by trying both leads in couplets solely dependent on such characters. Muscari botryoides (L.) Mill. an historical waif in California. Other TJM (1993) taxa moved to Agavaceae (Agave, Camassia, Chlorogalum, Hastingsia, Hesperocallis, Hesperoyucca, Leucocrinum, Yucca), Alliaceae (Allium, Ipheion, Nothoscordum), Amaryllidaceae (Amaryllis, Narcissus, Pancratium), Asparagaceae (Asparagus), Asphodelaceae (Aloe, Asphodelus, Kniphofia), Melanthiaceae (Pseudotrillium, Stenanthium, Toxicoscordion, Trillium, Veratrum, Xerophyllum), Nartheciaceae (Narthecium), Ruscaceae (Maianthemum, Nolina), Smilacaceae (Smilax), Tecophilaeaceae (Odontostomum), Themidaceae (Androstephium, Bloomeria, Brodiaea, Dichelostemma, Muilla, Triteleia), and Tofieldiaceae (Triantha). North American species of Disporum now in Prosartes. —Scientific Editors: Dale W. McNeal, Thomas J. Rosatti.

Key to Liliaceae

Rhizomes long. Stem: simple or branched. Leaf: cauline, alternate, oblong to ovate, acute to acuminate. Inflorescence: flowers 1(2) in leaf axils, with sharp bend at juncture of peduncle, pedicel. Flower: bell- to saucer-shaped; perianth parts 6, petal-like; stamens 6, filaments flat, anthers abruptly tipped; ovary superior, chambers 3, style 1, entire or 3-lobed. Fruit: berry, ± green to dark red. Seed: 3–15, elliptic, grooved or wrinkled.
7 species: North America, Eurasia. (Greek: twisted foot, from peduncles)

S. amplexifolius (L.) DC. var. americanus Schult. & Schult. f.
Rhizome thick; roots thick, fibrous. Stem: 30–100 cm, much-branched, glabrous to densely hairy. Leaf: ± sessile, 5–15 cm, 2–5 cm wide, entire or minute-dentate, ± glaucous below, base cordate, clasping. Flower: 9–15 mm, bell-shaped; perianth parts narrowly lance-oblong, spreading to ± recurved at tips, white, tinged (yellow-)green, outer flat, inner ± keeled, ± narrower, clasping stamens; stamens 6, outer filaments ± 1 mm, inner 2–3 mm, anthers attached at base; ovary superior, chambers 3, style 1, 4–5 mm, thick, entire or 3-lobed. Fruit: berry, 10–15 mm, yellow or red. Seed: many, ± 3 mm, pale yellow, grooved.
n=16. Moist, shaded areas; 250–1700 m. Klamath Ranges, High North Coast Ranges, High Cascade Range, n High Sierra Nevada, Modoc Plateau; to Alaska, central North America. [Streptopus amplexifolius var. denticulatus Fassett] May–Jun [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 24 2015
Citation for this treatment: [Author of taxon treatment] 2013. Streptopus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 24 2015

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Geographic subdivisions indicated for the distribution of Streptopus amplexifolius var. americanus Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.