中文名（Chinese Name）：千穗谷
学名（Scientific Name）：Amaranthus hypochondriacus Linn.
英文名（English Common Name）：Prince-of-Wales feather
别名（Chinese Common Name）：老枪谷、籽粒苋
异名（Synonym）：Amaranthus hybridus subsp. hypochondriacus (L.) Thell.；Amaranthus hybridus var. hypochondriacus (L.) Robinson；Amaranthus leucocarpus S. Wats.；Amaranthus anardana Buch.-Ham. ex Moq.；Amaranthus atrosanguineus Moq.；Amaranthus bernhardii Moq.；Amaranthus flavus L.；Amaranthus frumentaceus Buch.-Ham. ex Roxb.；Amaranthus hybridus f. hypochondriacus (L.) H.Rob.；Amaranthus hybridus var. erythrostachys Moq.；Amaranthus hybridus var. leucocarpus (S.Watson) Hunz.；Amaranthus hypochondriacus var. macrostachys Moq.；Amaranthus hypochondriacus var. monstrosus Moq.；Amaranthus hypochondriacus var. racemosus Moq.；Amaranthus hypochondriacus var. tortuosus Moq.；Amaranthus leucospermus S.Watson；Amaranthus macrostachyus Mérat ex Moq.；Amaranthus monstrosus Moq.
科属（Family & Genus）：苋科（Amaranthaceae）苋属
形态特征（Description）：一年生草本，高（10-）20-80厘米；茎绿色或紫红色，分枝，无毛或上部微有柔毛。叶片菱状卵形或矩圆状披针形，长3-10厘米，宽1.5-3.5厘米，顶端急尖或短渐尖，具凸尖，基部楔形，全缘或波状缘，无毛，上面常带紫色；叶柄长1-7.5厘米，无毛。圆锥花序顶生，直立，圆柱形，长达25厘米，直径1-2.5厘米，不分枝或分枝，由多数穗状花序形成，侧生穗较短，可达6厘米，花簇在花序上排列极密；苞片及小苞片卵状钻形，长4-5毫米，为花被片长的2倍，绿色或紫红色，背部中脉隆起，成长凸尖；花被片矩圆形，长2-2.5毫米，顶端急尖或渐尖，绿色或紫红色，有1深色中脉，成长凸尖；柱头2-3。胞果近菱状卵形，长3-4毫米，环状横裂，绿色，上部带紫色，超出宿存花被。种子近球形，直径约1毫米，白色，边缘锐。花期7-8月，果期8-9月。
分布（Distribution）：北美原产。
用途（Use）：
引自中国植物志英文版FOC Vol. 5 Page 418
Amaranthus hypochondriacus Linnaeus, Sp. Pl. 2: 991. 1753.
千穗谷 qian sui gu | Amaranthaceae  | Amaranthus
Amaranthus hybridus Linnaeus var. hypochondriacus (Linnaeus) Robinson; A. hybridus subsp. hypochondriacus (Linnaeus) Thellung.
Stem green or purple, 10-80 cm tall, branched, glabrous or slightly pilose. Petiole 1-7.5 cm, glabrous; leaf blade rhombic-ovate or oblong-lanceolate, 3-10 × 1.5-3.5 cm, glabrous, base cuneate, margin entire or undulate, apex acute or acuminate. Complex thyrsoid structures terminal, erect, cylindric, ca. 25 cm, 1-2.5 cm in diam., branched or not, composed of many spikes; lateral spikes short, ca. 6 cm. Bracts green or purple, ovate, subulate, 4-5 mm, ca. 2 × as long as perianth, apex distinctly long pointed. Tepals green or purple, with a dark midvein, oblong, ca. as long as or longer than fruit, apex acute or acuminate. Stigmas 2 or 3. Utricles exceeding perianth, green, tinged purple above, rhomboid-ovoid, 3-4 mm, circumscissile. Seeds white, subglobose, ca. 1 mm in diam. Fl. Jul-Aug, fr. Aug-Sep. 2n = 32.
Cultivated. Hebei, Jilin, Nei Mongol, Sichuan, Xinjiang, Yunnan [native to North America].

（责任编辑：徐晔春）