H. W. Rickett’s scientific contributions

... The results of molecular analysis prove this fact, because in dendrogram M2 appear in second cluster near Mentha aquatica (M1), so that indicate the genetic similarity in his structure. The morphological characteristics of the M2 variety correspond for Mentha x piperita, which it is universally agreed to be a hybrid (Harley, 1975). The leaves can be 4-9 cm long and 1.5-4 cm wide with a very short petiole. ...

Reference:

Use Of RAPD Markers For Identification Of Different Varieties In Mentha sp

... The flowers have small and numerous petals with strong pleasant scent. The leaves are divided and made up of two or more discrete leaflets, with large serrate pinna and small intermediate ones [16,17]. Since the plant has a favorable taste and smell, the whole plant parts are used in aromatic products and food industries [18]. ...

Reference:

Filipendula ulmaria (L.) Maxim. (Meadowsweet): a Review of Traditional Uses, Phytochemistry and Pharmacology