Phyteuma atropurpureum Hoppe Phyteuma halleri subsp. nigrum (F.W.Schmidt) Arcang. Phyteuma nigrum f. interruptum Rich.Schulz Phyteuma nigrum f. latibracteatum Rich.Schulz Phyteuma nigrum f. longibracteatum Rich.Schulz Phyteuma nigrum f. vulgare Rich.Schulz Phyteuma nigrum var. acuminatum Rich.Schulz Phyteuma nigrum var. coeruleum Rich.Schulz Phyteuma nigrum var. integrifolium Rich.Schulz Phyteuma spicatum subsp. nigrum (F.W.Schmidt) Rouy Phyteuma spicatum var. atropurpureum (Hoppe) Steud. Phyteuma spicatum var. caerulescens Godr. Phyteuma spicatum var. nigrum (F.W.Schmidt) Kuntze Phyteuma spicatum var. violaceum Klett & Richt.
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Referensi
POWO (2024). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; https://powo.science.kew.org/."
IPNI (2024). "International Plant Names Index. Published on the Internet http://www.ipni.org, The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries, and Australian National Herbarium"
