Notes on Potentilla L. (Rosaceae) of Altai. 5. A new intersectional hybrid from Central Altai
Abstract
A new nothospesies of Potentilla, P. × chemalense, from Central Altai is described and illustrated. It is an intersectional hybrid purportedly between P. chrysantha (P. sect. Chrysanthae) and P. tanacetifolia (P. sect. Tana-cetifoliae). The plant was found in the Chemalsky district in the Katun river valley (middle reaches). P. × chemalense grows on steppe-like stony southern-exposed slopes with shrub thickets. The morphological characters of the new nothospecies P. × chemalense are compared with those of related species. P. × chemalense is distinguished from P. chrysantha by pinnate leaves and from P. tanacetifolia by smaller number of pairs of lateral leaflets. The presence in P. × chemalense petiole of terminal leaflet makes it closer to P. tanacetifolia.
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