First growth, such as of feathers or sprouts and buds, often becomes confused until balance and natural positioning is achieved by the organism due to environment or the growth process and subsequent thickening of the stem. Meaning of MUSHROOM may relate to the soft undersides of the fungi, the gills or lamellae of agarics, from where spores are released, or simply due to the shapes of some mushrooms resembling those of some ears. Mushrooms also grow relatively fast, and most remain relatively soft while alive. Many mushrooms are「internally divided」into major portions of a root-like system, a stem, and cap, and the cap also is internally divided by gills.
Frankly, as MUSHROOM these elements may be referring primarily to 'shrooms, as「emerging stems that promote balance and adjust one's positioning」in the Universe that were used and traded as medicinal by shamans and not in micro-doses to be sure…at first, the experience may be CONFUSING, but soft and downy feelings follow soon thereafter:
「Mushrooms with psychoactive properties have long played a role in various native medicine traditions in cultures all around the world. They have been used as sacrament in rituals aimed at mental and physical healing, and to facilitate visionary states. One such ritual is the velada ceremony. A practitioner of traditional mushroom use is the shaman or curandera (priest-healer). Psilocybin mushrooms possess psychedelic properties. Commonly known as 'magic mushrooms' or 'shrooms, they are openly available in smart shops in many parts of the world, or on the black market in those countries that have outlawed their sale. Psilocybin mushrooms have been reported as facilitating profound and life-changing insights often described as mystical experiences. Recent scientific work has supported these claims, as well as the long-lasting effects of such induced spiritual experiences. Psilocybin, a naturally occurring chemical in certain psychedelic mushrooms such as Psilocybe cubensis, is being studied for its ability to help people suffering from psychological disorders, such as obsessive-compulsive disorder. Minute amounts have been reported to stop cluster and migraine headaches. A double-blind study, done by the Johns Hopkins Hospital, showed psychedelic mushrooms could provide people an experience with substantial personal meaning and spiritual significance. In the study, one-third of the subjects reported ingestion of psychedelic mushrooms was the single most spiritually significant event of their lives. Over two-thirds reported it among their five most meaningful and spiritually significant events. On the other hand, one-third of the subjects reported extreme anxiety. However, the anxiety went away after a short period of time.」
[ https://en.wikipedia.org/wiki/Mushroom 2013-08-28 ]
First confusing, then downy, for a life-altering, position and balance adjusting experience.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: confused; fluffy; luxuriant growth
Japanese EDRDG: mushroom
Unihan extended: soft, downy; buds, sprouts