P. rotundiloba (D. Y. Hong, 2011)[Hong, D. Y., J. Syst. Evol., vol. 49 (5), 2011, p. 464-467] |
| First Description: | P. decomposita subsp. rotundiloba (D. Y. Hong, 1997) |
| Synonyms: | P. decomposita subsp. rotundiloba (D. Y. Hong, 1997) |
P. rotundiloba (Flower) Photo: Juerg Plodeck (Basel, May 2023), © Copyright Juerg Plodeck 2023 [ click on image for full image ] |
| Plant: | Ploidy: | 2n=10 |
| Growth Habit: | tree / shrub | |
| Height: | up to 250cm | |
| Roots: | ||
| others: | stems 3cm in diameter at the base, grey-black; glabrous throughout |
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| Leaves: | # segmentation: | 20-37(-49) leaflets |
| others: | lower leaves mostly biternate-pinnate or ternate-pinnate, with 20-37(-49) leaflets; leaflets not decurrent; terminal leaflets rhomboid or orbicular, 2.4-5.5cm long, 1.5-4.8cm wide, 3-partite to the base or 3-fid, terminal lobe 3-lobed |
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| Flowers: | Season: | May |
| # flowers/stem: | solitary, terminal | |
| Bracts: | involucrate bracts 2-5, mostly 2 or 3, unequal in size, linear-lanceolate or broad-elliptic, lobed or segmented | |
| Sepals: | 3-5 in number, green, broadly ovate or nearly orbicular, unequal in size, 1.5-2.5cm wide, all caudate at the apex | |
| Petals: | obovate or oblong, incised at the apex, 3.5-6.5cm long, 2-4.6cm wide |
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| Flower Colour: | rose | |
| Filaments: | ||
| Anthers: | ||
| Disk: | half-leathery, pale yellow, enveloping the whole ovary at anthesis, 8-15mm high, with triangular teeth | |
| others: | flower diameter 10-15cm | |
| Fruit: | Season: | late August to September |
| # of Carpells: | most frequently 3, less often 2, 4 or 5 | |
| Carpell: | ||
| Style / Stigma: | styles 1-1.3mm long stigmas red |
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| Follicles / Ovary / Ovules: | follicles brown or grey-brown when mature, ellipsoid, 2.2-3.5cm long, 1.2-1.6cm in diameter | |
| Seeds: | black, glossy, broadly ellipsoid or nearly globose, 8-10mm long, 6-8mm in diameter | |
| Habitat: | Location: | growing in well-thickets, young secondary forests of sparse Cupressus chengiana forests, at an altitude of 1750-2700m |
| Soil: | on rocks | |
| Geogr. Distr.: | confined to the Minjiang River valley of N Sichuan and Tewo County of SE Gansu, China. Tewo County in SE Gansu is a new locatity for this species. The species is narrowly distributed and disjunct between the Minjiang Valley and the Bailongjiang Valley | |
| Countries: | China | |
| Common Names: |
P. rotundiloba (entire plant) Photo: Juerg Plodeck (Basel, May 2023), © Copyright Juerg Plodeck 2023 [ click on image for full image ] |
P. rotundiloba (single leave from top) Photo: Juerg Plodeck (Basel, May 2023), © Copyright Juerg Plodeck 2023 [ click on image for full image ] |
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P. rotundiloba (Flower) Photo: Juerg Plodeck (Basel, May 2023), © Copyright Juerg Plodeck 2023 [ click on image for full image ] |
P. rotundiloba (Fruit / Seeds) Photo: Juerg Plodeck (Basel, May 2023), © Copyright Juerg Plodeck 2023 [ click on image for full image ] |