龙老根，中药材名。本品为唇形科植物子宫草的根。拉丁植物名：Skapanthusoreophilus(Diels)C.Y.WuetH.W.Li[PlectranthusoreophilusDiels]采收和储藏：8-10月采收，洗净，晒干。功能主治为：调经。主月经不调。
Long-lao-gen, name of Chinese Medicinal Material. Root of Plectranthusoreophilus) is the root of the Labiatae plant Plectranthusoreophilus Diels. It is harvested from August to October, washed, and dried in the sun. It is used to regulate menstruation, especially for irregular menstruation.

功效作用 功能
The efficacy and functions.

调经。主治
Regulating menstruation. Used to treat

主月经不调。用法用量
Irregular menstruation. Dosage and administration.

内服：煎汤，6-15g。化学成分
Internal administration: Decoction, 6-15g. Chemical composition

全草含二萜醌类成分：16-乙酰氧基-7-O-乙酰基-浩米酮(16-acetoxy-7-O-acetylhorminone)，16-乙酰氧基-7α-甲氧基总状土木香醌(16-acetoxy-7α-methoxyroyleanone）。植物学信息 形态特征
The whole plant contains diterpenoid quinone components: 16-acetoxy-7-O-acetylhorminone and 16-acetoxy-7α-methoxyroyleanone. Botanical information and morphological characteristics.

子宫草，多年生草本。根茎细长，末端呈疙瘩状；茎单一，纤细，高15-25cm，具四槽，密被具节微柔毛。叶常4-6片呈密莲座状，阔卵圆形或菱状卵圆形，长3-6cm，宽2-3.5cm，先端钝，基部阔楔形，下延成具宽翅的假柄，边缘在基部以上具圆齿，两面密被灰白或棕色具节糙伏毛，下面尚密布褐色腺点，茎上的叶仅一对，细小，卵圆状披针形。聚伞花序3-5花，疏离，排成狭圆锥花序，花梗、总梗及育轴均密被腺短柔毛；苞片小，紫红至淡紫蓝色，狭卵圆形或披针形，小苞片线形；花萼宽钟形，长约2mm，宽达3mm，外面密被腺微柔毛及棕色腺点，呈3/2式二唇形，上唇较短，具3齿，下唇较长大，具2齿，齿均卵状三角形，先端具胼胝体，果时花萼增大；花冠紫蓝色，下倾，长达8mm，外被小疏柔毛，散布棕色腺点，冠筒长约4mm，基部上方浅囊状，至喉部略收缩，冠檐二唇形，外反；雄蕊4，二强，外对花丝基部宽大的外侧有疏柔毛丛；花柱丝状，先端2浅裂；花盘杯状，前方微隆起。小坚果圆球形，径约1mm，浅黄色，光滑。花期7-8月，果期9-10月。分布区域
Umbilicus rupestris, a perennial herb. The rhizome is slender and elongated, with nodules at the end; the stem is solitary, slender, 15-25cm tall, with four ridges, densely covered with soft hairs at the nodes. The leaves are usually 4-6, arranged in a dense rosette, broadly ovate or rhombic-ovate, 3-6cm long, 2-3.5cm wide, obtuse at the apex, broadly cuneate at the base, extending downward into a broad-winged false petiole, with rounded teeth above the base on the margin, densely covered with gray-white or brownish rough hairs on both surfaces, and densely dotted with brown glandular spots on the lower surface. The leaves on the stem are only a pair, small, ovate-lanceolate. The umbel inflorescence has 3-5 flowers, sparse, arranged in a narrow conical inflorescence, with the pedicels, peduncles, and pedicels covered with short glandular hairs; the bracts are small, purple-red to pale purple-blue, narrowly ovate or lanceolate, and the bracteoles are linear. The calyx is broadly campanulate, about 2mm long and 3mm wide, densely covered with short glandular hairs and brown glandular spots on the outside, bilabiate in a 3/2 ratio, with the upper lip shorter, with 3 teeth, and the lower lip larger, with 2 teeth, both teeth ovate-triangular, with a tubercle at the apex, enlarging when fruiting. The corolla is purple-blue, pendulous, up to 8mm long, sparsely covered with small soft hairs and scattered brown glandular spots on the outside, with a corolla tube about 4mm long, shallowly sac-like above the base, slightly constricted at the throat, bilabiate with the outer lip reflexed; stamens 4, didynamous, with sparse hairs at the base of the outer side of the filaments; style filiform, with 2 shallow lobes at the apex; disc cup-shaped, slightly raised in front. The small nut is spherical, about 1mm in diameter, light yellow, and smooth. Flowering period is from July to August, and fruiting period is from September to October. Distribution area: [not provided]

资源分布：分布于云南西北部。生长环境
Distribution: Found in the northwest of Yunnan Province, China. Habitat.

生态环境：生于松林下或林缘草坡。
Ecological environment: It grows under the pine forest or on the grassy slopes at the edge of the forest.