金钱蒲 jin qian pu

Acorus brevispathus K. M. Liu; A. gramineus var. flavomarginatus K. M. Liu; A. gramineus var. japonicus M. Hotta; A. gramineus var. macrospadiceus Yamamoto; A. gramineus var. pusillus (Siebold) Engler; A. humilis Salisbury; A. latifolius Z. Y. Zhu; A. macrospadiceus (Yamamoto) F. N. Wei & Y. K. Li; A. pusillus Siebold; A. rumphianus S. Y. Hu; A. tatarinowii Schott; A. tatarinowii var. flavomarginatus K. M. Liu; A. xiangyeus Z. Y. Zhu.

Rhizome slender, 5-10 × 0.4-0.6(-0.8) cm, aromatic. Leaves several, dark green, ensiform, (15-)20-45(-55) × (0.3-)0.5-1(-1.4) cm, midrib lacking, apex acuminate. Peduncle compressed triangular, (4-)9-20(-24) cm. Spathe green, leaflike, (8-)10-24(-25) × 0.2-0.4(-0.5) cm. Spadix straight or slightly curved, narrowly cylindric to subcylindric, (3-)4-10(-14) × (0.3-)0.4-0.6(-0.7) cm, densely flowered. Flowers yellowish or yellow-green to somewhat whitish, 1.8-2 mm in diam. seen from above; tepals ± oblong, 1.5-2 × 0.7-1 mm, keeled, membranous, apex rounded or acute; filaments oblong, flat, ca. 1.5 mm, anthers yellow, 0.4-0.5 mm in diam.; pollen grains ca. 15 µm, exine more densely foveolate; gynoecium obconic-cylindric, (2-)2.5-3 × (1.2-)1.8-2 mm, with conic, spongy apex and stigma very small. Infructescence yellowish to yellow-white at maturity, 1-1.5 cm in diam., berries densely arranged. Berry obovoid-globose, few to several seeded, 3-3.5 × 2.2-2.5 mm. Seed ellipsoid, (2-)2.5-3 × (0.8-)1-1.2 mm, with many long (3-4 mm) bristles (longer than seed itself); testa light brown, smooth. Fl. Feb-Jul, fr. Jul-Aug. 2n = 24.

Dense forests, moist rocky stream banks, meadows; below 2600 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Ningxia, Qinghai, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Xizang, Yunnan, Zhejiang [Cambodia, NE India, Japan, Korea, Laos, Myanmar, Philippines, Russia (E Siberia), Thailand, Vietnam].

Acorus gramineus occurs only in diploid populations.