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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LILIACEAE

LILY FAMILY

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.

STREPTOPUS

TWISTED-STALK

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)

Native

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.

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bioregional map for STREPTOPUS%20amplexifolius%20var.%20americanus 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 Streptopus amplexifolius var. americanus
Retrieve dichotomous key for Streptopus
Overlay Consortium of California Herbaria specimen data by county on this map
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