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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Fosiée Tahbaz

Shrubs, deciduous or evergreen, aromatic
Leaves simple, entire, opposite, short-petioled
Inflorescence: flowers solitary, terminal on bracted branches
Flower bisexual, radial, large; bracts grading into perianth; perianth parts many, spirally arrayed; stamens many, attached by short filaments to receptacle, becoming smaller and sterile inward; pistils many, simple, attached to inner face of hollow receptacle, ovules 1–2 per pistil, style thread-like, exserted from receptacle
Fruit: aggregate of achenes inside ± leathery receptacle
Genera in family: 3 genera, ± 6 species: North America, China; Calycanthus, Chimonanthus cultivated as ornamental and for fragrance.


Shrub, deciduous
Flower: perianth reddish brown, inner parts shorter; stamens in several whorls
Species in genus: 2 species: CA, eastern US
Etymology: (Greek: calyx flower, from hollow receptacle)


C. occidentalis Hook. & Arn.


Shrub erect, 1–3+ m, ± rounded
Leaf: petiole 4–6 mm; blade 3–15 cm, widely lanceolate to elliptic or oblong, firm, base generally rounded (or cordate), tip acute, lower surface hairy, upper surface scabrous
Flower ± 5 cm diam; perianth ± fleshy, hairy; inner sterile stamens shaggy-hairy
Fruit: hollow receptacle ovoid; outer surface with distinctive scars of perianth parts; included achenes many, ± velvety, margins granular
Chromosomes: n=11
Ecology: Moist, shady places, canyons, streamsides
Elevation: generally < 1500 m.
Bioregional distribution: s Outer North Coast Ranges, Inner North Coast Ranges, s Cascade Range, Sierra Nevada Foothills, c&s High Sierra Nevada, apparently naturalized in n Peninsular Ranges (Palomar Mtns)
Horticultural information: 4, 5, 6, 17 &IRR: 1, 2, 3, 7, 14, 15, 16, 22, 23, 24 &part SHD: 8, 9, 10, 11, 18, 19, 20, 21.

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bioregional map for CALYCANTHUS%20occidentalis being generated
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)
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 Calycanthus occidentalis
Retrieve dichotomous key for Calycanthus
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
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