Paeonia Species
based on / copied from D. Y. Hong "Paeonies of the World" vol. 1-3 (2010, 2011, 2021)


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P. californica (Nutt. Ex Torr. & Gray, 1838)

[Nutt. ex Torrey, J. & Gray, A., A Flora of North America, vol. 1, 1838, p. 41]
First Description: P. californica (Nutt. Ex Torr. & Gray, 1838)
P. brownii var. californica (Lynch, R. I., 1890)
P. brownii subsp. californica (Halda, 1997)

P. californica (Flower)
Photo: Juerg Plodeck (Basel, May 2023), © Copyright Juerg Plodeck 2023
[ click on image for full image ]
Plant: Ploidy: 2n=10
Growth Type: herbaceous / perennial
Height: 40-70cm
Roots: slightly fusiform-thickened, up to 3cm in diameter; caudex (rhizomes) up to 8cm long
others: stem up to 1.2cm in diameter, usually with sterile or fertile branches;
totally glabrous
Leaves: # segmentation: 33 - 78
others: lower leaves ternate, very occasionally nearly biternate;
leaflets 3, each leaflet with several segments, each segment usually with two or several lobes,
segments and/or lobes 33-78 in total; segments 3-8cm long, 0.4-2.0cm wide;
lobes linear to lanceolate, usually acute, sometimes mucronate at the apex, 0.2-3.0cm long, 0.2-1.2cm wide
Flowers: Season: January to May, but mostly in March and April
# flowers/stem: usually several, up to 6 on a stem, pendent
Bracts: involucrate bracts usually 1 or 2, leaf-like
Sepals: 3 or 4, rounded, green or green but purple at the periphery, or purple,
1.2-2.0cm long, 1.2-2.0cm wide, as large as , or slightly smaller than petals
Petals: 6-8, entire, purple, dull dark red, dark purple red, or brownish purple,
1.2-2.2cm long, 1.0-2.0cm wide
Flower Colour: purple, dull dark red, dark purple red, or brownish purple
Filaments: yellow
Anthers: yellow
Disk: fleshy, yellow, dentate, teeth variable in shape, 2.5-6mm high
others:  
Fruit: Season: June to July
# of Carpells: 3, less frequently 2
Carpell:  
Style / Stigma: stigmas sessile, 3mm long, 2mm wide, horizontal
Follicles / Ovary / Ovules: follicles cylindrical, 2.5-4.2cm long, 1.1-1.7cm in diameter
Seeds: seeds oblong black, 10-12mm long, 5.5-6mm in diameter
Habitat: Location: growing mostly in chaparral, or in openings or at the edges of chaparral and oak woods, from coastal areas at 30m in altitute to mountain areas up to 1200m
Soil: it prefers dry granite soil
Geogr. Distr.: distributed in the northern-most Baja California of Mexico and S California of the USA
Countries: USA, Mexico
Common Names: California peony
wild peony

P. californica (entire plant)
Photo: Juerg Plodeck (Basel, May 2023),
© Copyright Juerg Plodeck 2023
[ click on image for full image ]

P. californica (single leave from top)
Photo: Juerg Plodeck (Basel, May 2023),
© Copyright Juerg Plodeck 2023
[ click on image for full image ]

P. californica (Flower)
Photo: Juerg Plodeck (Basel, May 2023),
© Copyright Juerg Plodeck 2023
[ click on image for full image ]

P. californica (Fruit / Seeds)
Photo: Juerg Plodeck (Basel, May 2023),
© Copyright Juerg Plodeck 2023
[ click on image for full image ]

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