《中国植物志》|| 唇形科 LABIATAE ||百里香属 Thymus Linn. ||地椒 Thymus quinquecostatus Čelak.

11.地椒（广群芳谱引本草）
Thymus quinquecostatus Celak. in Osterr. Bot. Zeitschr 39: 263. 1889; Ronn. in Act. Hort. Gothob. 9: 99. 1934; Kitagawa., Lineam. Fl. Mansh. 389. 1939.
半灌木。茎斜上升或近水平伸展；不育枝从茎基部或直接从根茎长出，通常比花枝少，疏被向下弯曲的疏柔毛；花枝多数，彼此靠近，高3-15厘米，从茎上或茎的基部长出，直立或上升，具有多数节间，节间最多可达15个，通常比叶短，稀有与之相等或比叶长，在基部的先出叶通常脱落，花序以下密被向下弯曲的疏柔毛，毛在花枝下部较短而变疏。叶长圆状椭圆形或长圆状披针形，稀有卵圆形或卵状披针形，长7-13毫米，宽1.5-3（4.5)毫米，稀有长达2厘米，宽8毫米，先端钝或锐尖，基部渐狭成短柄，全缘，边外卷，沿边缘下1/2处或仅在基部具长缘毛，近革质，两面无毛，侧脉2（3）对，粗，在下面突起上面明显，腺点小且多而密，明显；苞叶同形，边缘在下部1/2被长缘毛。花序头状或稍伸长成长圆状的头状花序；花梗长达4毫米，密被向下弯曲的短柔毛。花萼管状钟形，长5-6毫米，上面无毛，下面被平展的疏柔毛，上唇稍长或近相等于下唇，上唇的齿披针形，近等于全唇1/2长或稍短，被缘毛或近无缘毛。花冠长6.5-7毫米，冠筒比花萼短。花期8月。
产山东，辽宁，河北，河南，山西；生于山坡，海边低丘上，海拔600-900米。朝鲜，日本也有。模式标本采自山东。

《Flora of China》|| Lamiaceae || Thymus ||地椒 Thymus quinquecostatus

11. Thymus quinquecostatus Celakovsky, Oesterr. Bot. Z. 39: 263. 1889.

地椒 di jiao

Stems obliquely ascending to subhorizontally spreading; vegetative shoots ± fewer than fertile branches, sparsely retrorse pilose; fertile branches numerous, crowded, 3-15 cm, erect to ascending, densely retrorse pilose below inflorescences, base sparsely fine pilose, internodes to 15, usually shorter than leaves. Leaves oblong-elliptic or oblong-lanceolate, rarely ovate to ovate-lanceolate, 0.7-1.3(-2) cm × 1.5-3(-8) mm, ± leathery, glabrous, densely glandular, base attenuate, margin entire, revolute, ciliate on lower half or only at base, apex obtuse to acute. Inflorescences capitate, sometimes oblong; floral leaves similar to stem leaves; bractlets usually deciduous. Pedicel to 4 mm. Calyx tubular-campanulate, 5-6 mm, base spreading pilose, apex glabrous; upper lip subequal to longer than lower lip, teeth lanceolate, to ca. 1/2 as long as lower lip, sometimes ciliate. Corolla 6.5-7 mm, tube shorter than calyx. Fl. Aug.

Gravelly areas, hills, riverbanks, rocky crevices, beaches, seashore dunes; 0-3500 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Shaanxi, Shandong, Shanxi [Japan, Korea, Russia]