（《唐本草》）
【释名】独摇。
宗 曰∶木身似杨微白，故曰白杨，非如粉之白也。
时珍曰∶郑樵《通志》言∶白杨，一名高飞，与 杨同名。今俗通呼 杨为白杨，且白
杨亦因风独摇，故得同名也。
【集解】恭曰∶白杨取叶圆大、蒂小，无风自动者。
藏器曰∶白杨，北土极多，人种墟墓间，树大皮白。其无风自动者，乃
颂曰∶今处处有之，北土尤多。株甚高硕，叶圆如梨叶，皮白色，木似杨，采无时。崔
豹《古今注》云∶“白杨叶圆，青杨叶长”，是也。
宗 曰∶陕西甚多，永、耀间居人修盖，多此木也。其根易生，斫木时碎札入土即生根，
故易繁植，土地所宜尔。风才至，叶如大雨声。谓无风自动，则无此事。但风微时，其叶孤
绝处，则往往独摇，以其蒂细长，叶重大，势使然也。
时珍曰∶白杨木高硕。叶圆似梨而肥大有尖，面青而光，背甚白色，有锯齿。木肌细白
，性坚直，用为梁 ，终不挠曲。与 杨乃一类二种也，治病之功，大抵仿佛。嫩叶亦可救
荒，老叶可作酒曲料。
木皮
【修治】 曰∶凡使，铜刀刮去粗皮蒸之，从巳至未。以布袋盛，挂屋东角，待干用。
【气味】苦，寒，无毒。大明曰∶酸，冷。
【主治】毒风香港脚肿，四肢缓弱不随，毒瓦斯游 在皮肤中，痰癖等，酒渍服之（《唐本》）。
去风痹宿血，折伤，血沥在骨肉间，痛不可忍，及皮肤风瘙肿，杂五木为汤，浸损处
治扑损瘀血，并煎酒服。煎膏，可续筋骨（大明）。煎汤日饮，
煎浆水入盐含漱，治口疮。煎水酿酒，消瘿气（时珍）。
【附方】旧一，新一。
妊娠下痢∶白杨皮一斤，水一斗，煮取二升，分三服。（《千金方》）
项下瘿气∶秫米三斗炊熟，取圆叶白杨皮十两，勿令见风，切，水五升，煮取二升，渍
曲末五两，如常酿酒。每旦一盏，日再服。
枝
【主治】消腹痛，治吻疮（时珍）。
【附方】旧二，新一。
口吻烂疮∶白杨嫩枝，铁上烧灰，和脂敷之。（《外台秘要》）。
腹满癖坚如石，积年不损者∶《必效方》∶用白杨木东南枝（去粗皮，辟风细锉）五升。
熬
黄，以酒五升淋讫，用绢袋盛滓，还纳酒中，密封再宿。每服一合，日三服。（《外台秘要》）。
面色不白∶白杨皮十八两，桃花一两，白瓜子仁三两，为末。每服方寸匕，日三服。五十日，
面及手足皆白。（《圣济总录》）
叶
【主治】龋齿，煎水含漱。又治骨疽久发，骨从中出，频捣敷之（时珍）。
(From *Tang Bencao*)
[Nomenclature] Alias "Duyao" (Solely Shaking).
Su Song stated: The trunk resembles that of a poplar but is slightly white, hence the name Baiyang (White Poplar), not white like powder.
Li Shizhen stated: Zheng Qiao in *Tongzhi* mentioned: Baiyang (White Poplar), also known as Gaofei, shares the same name as [Certain] Yang. Currently, the common people generally refer to [Certain] Yang as Baiyang (White Poplar), and Baiyang (White Poplar) also earns this shared name because it shakes alone in the wind.
[Collection and Explanation] Su Gong stated: Select leaves that are round and large, with small petioles, which move automatically without wind.
Chen Zangqi stated: Baiyang (White Poplar) is extremely abundant in the northern regions; people plant it among tombs, where the trees grow large with white bark. Those that move without wind are...
Su Song stated: It is found everywhere now, especially in the north. The plants are very tall and robust, with leaves round like pear leaves, white bark, and wood resembling poplar. Collection has no fixed time. Cui Bao's *Gujin Zhu* states: "Baiyang (White Poplar) leaves are round, Qingyang (Green Poplar) leaves are long," which is correct.
Su Song stated: Shaanxi has many of them; residents between Yong and Yao often use this wood for repairs. Its roots sprout easily; when chopping the tree, broken branches falling into the soil take root, making it easy to propagate abundantly. This is due to the suitability of the land. When the wind arrives, the leaves make a sound like heavy rain. To say they move without wind is incorrect. However, when the wind is slight, leaves at isolated positions often shake alone, because their petioles are slender and long, and the leaves are heavy, causing this by necessity of their form.
Li Shizhen stated: The Baiyang (White Poplar) tree is tall and robust. The leaves are round like pear leaves, thick and large with pointed tips, green and glossy on the front, very white on the back, with serrated edges. The wood texture is fine and white, with a firm and straight nature; used as beams, they never bend or twist. It belongs to the same category as [Certain] Yang but is a different species; its therapeutic efficacy is largely similar. Young leaves can also be used to survive famine, and old leaves can serve as ingredients for yeast.
Bark
[Preparation] Lei Xiao stated: Whenever used, scrape off the rough bark with a copper knife, then steam it from Si hour to Wei hour. Place in a cloth bag, hang it in the east corner of the house, wait until dry, and then use.
[Flavor and Toxicity] Bitter, Cold, Non-toxic. Ma Zhi stated: Sour, Cold.
[Indications] Toxic wind causing Hongjiaojiao (Gouty swelling/foot swelling), flaccidity and weakness of the four limbs with loss of voluntary movement, toxic qi wandering within the skin, phlegm accumulation, etc. Soak in wine and take orally (*Tang Bencao*).
Expel wind-bi (wind-pain syndrome) and old blood stasis, treat fractures and injuries, blood exuding between bone and flesh causing unbearable pain, as well as skin wind-rash and swelling. Decoct with five types of woods and soak the affected area. Treat traumatic bruising and blood stasis, and decoct with wine for oral administration. Decoct into an ointment to knit bones and tendons (Ma Zhi). Decoct and drink daily.
Decoct with fermented grain water, add salt, and gargle to treat mouth ulcers. Decoct to brew wine to eliminate Yingqi (goiter/qi stagnation) (Li Shizhen).
[Attached Prescriptions] One old prescription, one new prescription.
Dysentery during pregnancy: Baiyangpi (White Poplar Bark) 1 jin, water 1 dou, boil to obtain 2 sheng, divide into three doses (*Qianjin Fang*).
Neck Goiter: Cooked Shumi (Millet) 3 dou, take round-leaf Baiyangpi (White Poplar Bark) 10 liang, avoid exposure to wind, chop, add 5 sheng of water, boil to obtain 2 sheng, soak 5 liang of yeast powder, brew as usual wine. Take one cup every morning, twice a day.
Branches
[Indications] Relieve abdominal pain, treat lip sores (Li Shizhen).
[Attached Prescriptions] Two old prescriptions, one new prescription.
Ulcerated Lip Sores: Burn tender Baiyang (White Poplar) branches on iron until ash, mix with fat/lard and apply externally (*Waitai Miyao*).
Abdominal fullness, hard masses like stones persisting for years: *Bixiao Fang*: Use Southeast-facing branches of Baiyangmu (White Poplar Wood) (remove rough bark, finely chop avoiding wind direction) 5 sheng. Stir-fry until yellow, pour 5 sheng of wine over it, place the dregs in a silk bag, return to the wine, seal tightly and leave overnight. Take 1 he each time, three times a day (*Waitai Miyao*).
Pale complexion: Baiyangpi (White Poplar Bark) 18 liang, Taohua (Peach Blossom) 1 liang, Baiguazi Ren (White Melon Seed Kernel) 3 liang, grind into powder. Take one fangcunbi (square-inch spoonful) each time, three times a day. After fifty days, the face and hands/feet will become white (*Shengji Zonglu*).
Leaves
[Indications] Dental caries, decoct water and gargle. Also treats chronic bone abscess where bone protrudes; frequently pound and apply topically (Li Shizhen).