Populus tremuloides

Made from the aspen bark — the whispering tree of the northern woods, its bark carrying the same salicin as the willow, the family that gave the world aspirin.

SourceWoody plantTrees & shrubs

The whole picture, in one breath

Think of a bladder that irritates the night: frequent urging and dribbling, the night restlessness of the proving, the dull, heavy state, and the books' great aspen remedy — the whispering tree whose bark shares the willow's gift. The night-irritated bladder: that is Populus tremuloides.

The substance, in plain words

The trembling aspen is the whispering tree of the northern woods, its leaves quaking on their flattened stalks — and its bark carries salicin, the same natural aspirin-family compound as the willow, the chemistry that gave the world the analgesic age. The proving gave the aspen the urinary portrait.

The traditional picture Classical sources

The inner state

The body

Modalities (worse and better factors)

Worse from ⬇Better from ⬇
cold damp weather; night; the least excitement.rest; warmth; quiet.

Where it acts (organ affinities)

Bladder and urinary tract, general vitality, sleep.

Where the classical picture comes from

The whispering tree's proving gave the night-irritated bladder; Populus became the classical remedy of the urinary urging — the aspen's salicin-bearing bark serving the bladder it was said to quiet.

The substance in real medicine Pharmacology

What this section is: the pharmacology and toxicology of the source substance. It is not clinical evidence that a homeopathic preparation of it treats any condition. What controlled trials do and do not show is set out on the Evidence page.

The aspens and willows genuinely share the salicin chemistry — the natural aspirin family, the same lineage that produced salicin, salicylic acid and finally aspirin, the most-used drug in history. The bladder it portrayed is now urology's; the family's chemistry is the foundation of the analgesic age.

Look-alikes (how the classical authors told it apart)

RemedyLooks similar because…Tells it apart because…
Equisetum hyemaleBladder irritationEquisetum is the tender, touch-me-not bladder; Populus the night-irritated one.
PetroselinumUrinary urgingPetroselinum's urge is sudden and irresistible; Populus' the night dribbling.
Salicylicum acidumThe salicin familySal-acid is the rheumatism and ringing of the same chemistry; Populus the bladder.
Sabal serrulataUrinary difficultySabal is the enlarged prostate; Populus the irritated bladder itself.
Safety. Urinary frequency with pain, blood or fever needs testing; persistent night urinary symptoms deserve review.
Compiled by Dr. Sohil Momin, BHMS · Open Materia Medica