土桂皮，中药名。为樟科樟属植物钝叶桂Cinnamomumbejolghota（Buch.-Ham.）Sweet和大叶桂CinnamomuminersReinw.exBl.的树皮。植物钝叶桂，分布于我国云南南部、广东南部，锡金、印度、孟加拉、缅甸、老挝、越南也有；植物大叶桂，分布于我国云南南部、广西西南部（龙津）及西藏东南部（墨脱），斯里兰卡、印度、缅甸经中南半岛和马来西亚至印度尼西亚也有。具有祛风散寒，温经活血，止痛之功效。主治风寒痹痛，腰痛，经闭，痛经，跌打肿痛，胃脘寒痛，腹痛，虚寒泄泻，外用治外伤出血，蛇咬伤。
Tu-gui-pi, name of Chinese Medicinal Material. It is the bark of Cinnamomum bejolghota (Buch.-Ham.) Sweet and Cinnamomum iners Reinw.ex Bl., both belonging to the genus Cinnamomum in the family Lauraceae. Cinnamomum bejolghota is distributed in the southern part of Yunnan and Guangdong in China, as well as in Sikkim, India, Bangladesh, Myanmar, Laos, and Vietnam. Cinnamomum iners is distributed in the southern part of Yunnan, the southwestern part of Guangxi (Longjin), and the southeastern part of Tibet (Mêdog) in China, as well as in Sri Lanka, India, Myanmar, and through the Indochina Peninsula and Malaysia to Indonesia. It has the functions of dispelling wind and cold, warming the meridians and promoting blood circulation, and relieving pain. It is used to treat wind-cold arthralgia, lumbago, menstrual disorders, dysmenorrhea, bruises, stomach pain, abdominal pain, cold diarrhea, and externally for traumatic bleeding and snake bites.

功效作用 功能
Efficacy, function.

祛风散寒，温经活血，止痛。主治
Dispel wind, scatter cold, warm the meridians, promote blood circulation, and relieve pain. Mainly used for治疗.

风寒痹痛，腰痛，经闭，痛经，跌打肿痛，胃脘寒痛，腹痛，虚寒泄泻，外用治外伤出血，蛇咬伤。用法用量
Wind-cold bi pain, lower back pain, menstrual blockage, dysmenorrhea, bruises and swelling, epigastric cold pain, abdominal pain, deficiency-cold diarrhea, external application for external bleeding, snake bites. Dosage and administration.

内服：煎汤，5～10g；研末，1～1.5g。外用：适量，研末撒或调敷。相关论述
Internal use: Decoction, 5-10g; Powder, 1-1.5g. External use: Proper amount, sprinkle or apply the powder. Related discussions.

广州部队《常用中草药手册》：“祛风散寒，行气止痛，主治胃寒疼痛，虚寒泄泻，风湿骨痛，腰肌劳损，肾虚阳痿，经闭，蛇咬伤。”加工炮制 采收加工
Guangzhou Military's "Handbook of Commonly Used Chinese Herbal Medicines": "Dispelling wind, dispersing cold, promoting qi circulation, relieving pain, mainly used for treating stomach cold pain, deficiency-cold diarrhea, rheumatic bone pain, lumbar muscle strain, kidney deficiency impotence, menstrual disorders, and snake bites." Processing and preparation: harvesting and processing.

四时均可采收，剥取树皮，洗净，阴干。药材鉴别 药材性状
The bark can be harvested at any time of the year, peeled, washed, and dried in the shade. Identification of medicinal materials and their characteristics.

呈板状片块。表面棕色或灰褐色。皮孔点状或纵向长圆形，老树皮常有灰绿色地衣斑；内面棕色或深棕色。气香，味甜微辣。植物学信息 植物种属
The herb appears as flat, plate-like pieces with a brown or grey-brown surface. The skin pores are dot-like or longitudinally oval, and old bark may have gray-green lichen spots. The inner side is brown or dark brown. It has a fragrant smell, with a sweet and slightly spicy taste. Botanical information about the plant species.

樟科樟属植物钝叶桂和大叶桂。形态特征
Cinnamomum camphora and Cinnamomum macrophyllum are plants in the Lauraceae family. They have the following morphological characteristics:

1、钝叶桂，小至大乔木，高5～25米，胸径达30厘米；树皮青绿色，有香气。枝条常对生，粗壮，小枝圆柱形或钝四棱形，干时红褐色，初时被微柔毛，后变无毛。芽小，卵珠形，芽鳞密被绢状毛。叶近对生，椭圆状长圆形，长12～30厘米，宽4～9厘米，先端钝、急尖或渐尖，基部近圆形或渐狭，硬革质，上面绿色，光亮，下面淡绿或黄绿色，多少带白色，两面极无毛，三出脉或离基三出脉，侧脉自叶基0.5～1.5厘米处生出，斜伸，与中脉直贯叶端，在上面略凹陷或凸起，下面明显凸起，横脉及细脉在上面不明显，下面稍明显，呈网状，叶柄粗壮，长1～1.5厘米，腹平背凸。圆锥花序生于枝条上部叶腋内，长13～16厘米，多花密集，多分枝，分枝长约3厘米，总梗长7～11厘米，与各级序轴略被灰色短柔毛。花黄色，长达6毫米；花梗长4～6毫米，被灰色短柔毛。花被筒短，倒锥形，长约1毫米；花被裂片6，卵状长圆形，长5毫米，宽2.5毫米，先端锐尖，两面被灰色短柔毛但顶端近无毛。能育雄蕊9，第一、二轮雄蕊长约3.5毫米，花药卵圆状长圆形，与花丝近等长，药室内向，花丝无腺体，第三轮雄蕊长约3.7毫米，花药较狭长，长圆形，长约1.7毫米，花丝扁平，长达2毫米，近基部有一对具长柄的圆状肾形腺体。退化雄蕊3，位于最内轮，明显，长3毫米，箭头状正三角形，具长柄。子房长圆形，长1.5毫米，花柱细长，长达3毫米，柱头盘状。果椭圆形，长1.3厘米，宽8毫米，鲜时绿色；果托黄带紫红，稍增大，倒圆锥形，顶端宽达7毫米，具齿裂，齿顶端截平；果梗紫色，略增粗。花期3～4月，果期5～7月。2、大叶桂，乔木，高达20米，胸径20厘米。枝条常对生，粗壮，小枝圆柱形或钝四棱形，干时黑褐色，初时密被微柔毛，后渐变无毛。芽小，卵珠形，鳞片密被绢状毛。叶近对生，卵圆形或椭圆形，长12～35厘米，宽5.5～8.5厘米，先端钝或微凹，基部宽楔形至近圆形，硬革质，上面绿色，光亮，无毛，下面黄绿色，晦暗，初密被短柔毛，后毛被渐脱落但老时仍不完全脱落，三出脉或离基三出脉，侧脉自叶基0～10毫米处生出且直贯叶端，中脉及侧脉两面凸起，横脉及细脉两面稍明显或上面不明显下面隐约可见；叶柄粗壮，长1～3厘米，红褐色，多少密被短柔毛。圆锥花序腋生或近顶生，1～3出，长6～26厘米，多分枝，分枝长1～2.5（6）厘米，末端为3～7花的聚伞花序，总梗长3～10（15）厘米，与各级序轴密被短柔毛。花淡绿色，长4～5（6）毫米；花梗长2.5～5毫米，密被灰色短柔毛。花被内外两面密被灰色短柔毛，花被筒倒锥形，长1～2毫米，花被裂片6，外轮卵圆状长圆形，长4毫米，宽2毫米，内轮长圆形，较狭，长约4毫米，宽1.5毫米，先端均锐尖。能育雄蕊9，花丝均被柔毛，第一、二轮雄蕊长3毫米，花药卵圆状长圆形，与花丝近等长，4室，内向，第三轮雄蕊长3.6毫米，花药长圆形，较狭，长约1.5毫米，比花丝稍短，花丝近基部有一对圆状肾形腺体。退化雄蕊3，位于最内轮，明显，长2.3毫米，箭头状三角形，具长柄。子房卵球形，长1.5毫米，花柱纤细，长约3毫米，柱头盘状扁平，具圆裂片。果卵球形，先端具小突尖，长9～10（12）毫米，宽约7毫米，鲜时淡绿色或绿色；果托倒圆锥形或碗形，稍增大，宽达8毫米，顶端有稍增大或开张的宿存花被片，果梗略增粗。花期3～4月，果期5～6月。分布区域

1. Cinnamomum camphora, a large evergreen tree, can grow up to 5-25 meters tall with a trunk diameter of up to 30 centimeters. The bark is greenish-blue and fragrant. The branches are often opposite, thick and stout, with small branches that are cylindrical or bluntly quadrangular. When mature, the branches are reddish-brown, initially covered with fine hairs that later become hairless. The buds are small, ovate, and covered with silky hairs. The leaves are nearly opposite, elliptic to oblong, 12-30 centimeters long and 4-9 centimeters wide, with a blunt, acute, or gradually pointed apex, and a nearly round or gradually narrowed base. They are leathery, shiny green on the upper surface, and pale green or yellowish-green on the lower surface, sometimes with white patches. The leaves are hairless on both sides, with three main veins or basal three main veins. The leaf veins are reticulate, with the lateral veins arising 0.5-1.5 centimeters from the leaf base, slanting and extending towards the leaf tip. The petioles are stout, 1-1.5 centimeters long, flat on the ventral side and convex on the dorsal side. The cone-shaped inflorescences are borne in the upper leaf axils, 13-16 centimeters long, densely flowered, with many branches. The flowers are yellow, up to 6 millimeters long, with grayish silky-hairy pedicels. The flowers have a short tubular calyx, inverted conical in shape, about 1 millimeter long, with 6 oblong-elliptic lobes, 5 millimeters long and 2.5 millimeters wide, and hairy on both sides except near the tip. There are 9 fertile stamens, with the first and second whorls about 3.5 millimeters long, anthers oblong-elliptic, about as long as the filaments, introrse, and without glands on the filaments. The third whorl of stamens is about 3.7 millimeters long, with narrower anthers, about 1.7 millimeters long, and flattened filaments, up to 2 millimeters long, with a pair of stalked rounded kidney-shaped glands near the base. There are 3 sterile stamens in the innermost whorl, distinct, 3 millimeters long, arrowhead-shaped, and with a long stalk. The ovary is oblong, 1.5 millimeters long, with a slender style up to 3 millimeters long and a disc-shaped stigma. The fruit is ellipsoid, 1.3 centimeters long and 8 millimeters wide, green when fresh; the fruit receptacle is yellow with purple-red tinges, slightly enlarged, inverted conical, up to 7 millimeters wide at the apex, with toothed lobes, and a slightly thickened purple fruit stalk. The flowering period is from March to April, and the fruiting period is from May to July.2. Cinnamomum porrectum, a tall tree that can grow up to 20 meters tall with a trunk diameter of 20 centimeters. The branches are often opposite, thick and stout, with small branches that are cylindrical or bluntly quadrangular. When mature, the branches are dark brown, initially densely covered with fine hairs that gradually become hairless. The buds are small, ovate, and covered with silky hairs. The leaves are nearly opposite, ovate or elliptic, 12-35 centimeters long and 5.5-8.5 centimeters wide, with a blunt or slightly concave apex, and a wide wedge-shaped to nearly round base. They are leathery, shiny green on the upper surface, hairless, and yellowish-green on the lower surface, initially densely covered with short hairs that later fall off but remain incompletely shed in old leaves. The leaves have three main veins or basal three main veins, with lateral veins arising 0-10 millimeters from the leaf base and extending directly to the leaf tip. The midrib and lateral veins are raised on both sides, with the reticulate veins and fine veins slightly visible on the lower surface and faintly visible on the upper surface. The petioles are stout, 1-3 centimeters long, reddish-brown, and somewhat densely covered with short hairs. The umbel inflorescences are axillary or near the apex, 1-3 per node, 6-26 centimeters long, with many branches. The branches are 1-2.5 (6) centimeters long, ending in umbels of 3-7 flowers, with a total peduncle length of 3-10 (15) centimeters, densely covered with short hairs on all levels. The flowers are pale green, 4-5 (6) millimeters long, with pedicels 2.5-5 millimeters long, densely covered with grayish short hairs. The calyx of the flower is densely covered with short gray hairs on both sides, with an inverted conical tube 1-2 millimeters long, and 6 lobes, the outer whorl oblong-elliptic, 4 millimeters long and 2 millimeters wide, and the inner whorl elongated oval, narrower, about 4 millimeters long and 1.5 millimeters wide, with sharp tips. There are 9 fertile stamens, with hairy filaments, the first and second whorls are 3 millimeters long, anthers oblong-elliptic, about as long as the filaments, 4-loculed, introrse, the third whorl of stamens is about 3.6 millimeters long, anthers elongated oval, narrower, about 1.5 millimeters long, slightly shorter than the filaments, with a pair of rounded kidney-shaped glands near the base of the filaments. There are 3 sterile stamens in the innermost whorl, distinct, 2.3 millimeters long, arrowhead-shaped triangular, with a long stalk. The ovary is ovoid, 1.5 millimeters long, with a slender style about 3 millimeters long and a disc-shaped flattened stigma with rounded lobes. The fruit is ovoid, with a small pointed tip at the apex, 9-10 (12) millimeters long and about 7 millimeters wide, pale green or green when fresh; the fruit receptacle is inverted conical or bowl-shaped, slightly enlarged, up to 8 millimeters wide, with slightly enlarged or spreading persistent floral bracts at the apex, and a slightly thickened fruit stalk. The flowering period is from March to April, and the fruiting period is from May to June. Distribution area.

1、钝叶桂，分布于我国云南南部、广东南部，锡金、印度、孟加拉、缅甸、老挝、越南也有。2、大叶桂，分布于我国云南南部、广西西南部（龙津）及西藏东南部（墨脱），斯里兰卡、印度、缅甸经中南半岛和马来西亚至印度尼西亚也有。生长环境

1. Cinnamomum obtusifolium is distributed in the southern part of Yunnan and Guangdong provinces in China, as well as in Sikkim, India, Bangladesh, Myanmar, Laos, and Vietnam.2. Cinnamomum macrophyllum is found in the southern part of Yunnan province, southwestern Guangxi (Longjin), and southeastern Tibet (Motuo) in China, as well as in Sri Lanka, India, Myanmar through the Indochina Peninsula, and Malaysia to Indonesia. Habitat.

1、钝叶桂，生于山坡、沟谷的疏林或密林中，海拔600～1780米。2、大叶桂，生于山谷路旁、疏林或密林中，海拔140～1000米。

1. Bluntleaf laurel grows in sparse forests or dense forests on mountain slopes, valleys, and ravines, at altitudes of 600 to 1780 meters.2. Largeleaf laurel grows on the roadside of mountain valleys, in sparse forests or dense forests, at altitudes of 140 to 1000 meters.