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

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P. rockii (T. Hong & J. J. Li, 1998)

[T. Hong & J. J. Li ex D. Y. Hong, Acta Phytotax. Sin., vol. 36 (6), 1998, p. 538-543, fig. 2]

consisting of 2 subspecies --- Key to P. rockii subsp.
First Description:
Synonyms: P. suffruticosa (Stern, 1946)
P. suffruticosa var. papaveracaea (Pan, K. J., 1979)
Plant: Ploidy: 2n=10
Growth Type: tree / shrub
Height: up to 180cm
Roots: cylindrical, attenuate downwards
Leaves: # segmentation: 17-33
others: lower leaves ternate-pinnate, ternate-bipinnate or biternate-pinnate,
leaflets 17-33, lanceolate to ovate-lanceolate and mostly entire, or ovate to ovate-orbicular and mostly lobed,
2-11cm long, 1.5-4.5cm wide, villose along veins beneath, truncate to cuneate at the base, acute or acuminate at the apex
Flowers: Season: late April to May
# flowers/stem: solitary, terminal
Bracts: involucrate bracts 3-4, leaf-like
Sepals: 4-7, ovate-lanceolate, ovate-orbicular or orbicular, all caudate at the apex
Petals: 8-13, obovate, white or rarely red, always with a large and dark purple blotch at the base,
5-9cm long, 4-7cm wide
Flower Colour: white or rarely red, always with a large and dark purple blotch at the base
Filaments: yellow
Anthers: yellow
Disk: entirely enveloping carpels, pale yellow, leathery, dentate or lobed at the apex
Fruit: Season: late july to August
# of Carpells: 5
Carpell: densely tomentose
Style / Stigma: styles 0.5-2mm long, tomentose
stigmas pale yellow
Follicles / Ovary / Ovules: follicles oblong, densely yellow tomentose, ca. 3cm long
Habitat: Location: growing usually in deviduous forests in limestone areas at an altitude of 850-2800m
Soil: in limestone areas
Geogr. Distr.: endemic to China: SE Gansu, W Henan, W Hubei, Ningxia, Shaanxi and N Sichuan
Countries: China
Common Names: Rock's peony
tree peony

  Key to the   P. rockii subsp.

Key / Info Name                  
1a Leaflets lanceolate to ovate-lanceolate, all or mostly entire 5a P. rockii subsp. rockii
1b Leaflets ovate to ovate-orbicular, all or mostly lobed 5b P. rockii subsp. atava

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