";s:4:"text";s:3659:" [e] Soon after that, in 1794, Carl Peter Thunberg collected and described Magnolia obovata from Japan and at roughly the same time Magnolia kobus was also first collected.[23]. The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. My Magnolia's Leaves Developed Black Spots, Turned Brown and Fell Off. The bark and flower buds of M. officinalis have long been used in traditional Chinese medicine, where they are known as hou po (厚朴). Larger species can grow 80 feet in height. Magnolias are spreading, evergreen or deciduous trees or shrubs, characterised by large fragrant flowers which may be bowl-shaped or star-shaped, in shades of white, pink, purple, green or yellow. The "bumps" in this case turn out to be a false alarm. [8][9][10][11][12][13] Magnolol[14] and honokiol[15] activate the nuclear receptor peroxisome proliferator-activated receptor gamma. Magnolia contains the American evergreen species M. grandiflora, which is of horticultural importance, especially in the southeastern United States, and M. virginiana, the type species. Barbara Gillette is a Master Gardener, Herbalist, beekeeper, and journalist with decades of experience propagating and growing fruits, vegetables, herbs, and ornamentals. In parts of England, the petals of M. grandiflora are pickled and used as a spicy condiment. Q.-- There's a Black Coating on My Specimen, and Ants Are Running All Over It. View the picture in this FAQ to see what caused one reader to worry; armed with this knowledge, you won't make the same mistake (there's plenty else to worry about without enduring false alarms, right?). Magnolias generally like acidic soil, and if you have neutral or alkaline soil, you can heavily amend it with peat moss to lower the pH before planting. The Spruce uses cookies to provide you with a great user experience. Q.-- I Have a Southern Magnolia. Southern magnolias are one of the grand trees of the South. For example, Flora of China offers two choices: a large genus Magnolia which includes about 300 species, everything in the Magnoliaceae except Liriodendron (tulip tree), or 16 different genera, some of them recently split out or re-recognized, each of which contains up to 50 species. Slightly fragrant, the large blooms may last up to 4 weeks. Kobus magnolia is one of the parent species (Stella magnolia is the other) that together produce the Loebner magnolia. Magnolias are somewhat unique among flowering trees and shrubs in their tolerance for shady conditions. He was at least responsible for the taxonomic part of Johann Jacob Dillenius's Hortus Elthamensis[20] and of Mark Catesby's Natural History of Carolina, Florida and the Bahama Islands.