Corispermum falcatum Iljin, Izv. Glavn. Bot. Sada SSSR 28: 644 (1929)

Sukhorukov, Alexander P., Liu, Pei-Liang & Kushunina, Maria, 2019, Taxonomic revision of Chenopodiaceae in Himalaya and Tibet, PhytoKeys 116, pp. 1-141 : 82-83

1. Corispermum falcatum Iljin, Izv. Glavn. Bot. Sada SSSR 28: 644 (1929)

Lectotype

(Sukhorukov, designated here): [CHINA] Tibet, Gyangtse, Jul-Sep 1904, H.J. Walton s.n. (K000898762! isolectotypes E00317867! P04931276! clastotypes G! LE01013342!).

Note.

Iljin (1929) indicates two type specimens ("Kew [K] and Vienna Univ. [WU]") in the protologue. We did not find the material in WU and thus select a lectotype in herbarium K with additional authentic material in other herbaria.

Description.

Annual up to 40 cm, slightly pubescent. Leaves lanceolate, oblanceolate or narrowly oblong, often recurved, up to 3.0 × 0.5 cm. Inflorescence elongated, with many flowers. Bracts usually recurved, sickle-shaped, not completely covering the fruit. Fruits 3.5-4.0 × 3.0 mm, glabrous but sometimes with dark-brown cells and scattered warts (Fig. 33A ); fruit margin emarginate at the top. Wing 0.45-0.60 mm, denticulate or crisp, narrowly triangular in cross-section. Sclereids in the medium fruit part consist of 1-2 cell layers orientated parallel to the fruit axis.

Habitat.

Screes and sandy riverbeds; 3500-4800 m a.s.l.

Phenology.

Flowering: July-September; fruiting: August-October.

Distribution.

See Fig. 34 .

Specimens examined.

CHINA: Xizang: Ngari Prefecture: Gar (Gaer) County, 4250 m a.s.l., 29 Jul 1976, Qinghai-Tibet Team 76-8613 (PE00540486); Gar (Gaer) County, nr Shiquanhe river, 4250-4300 m a.s.l., 6 Aug 1976, Qinghai-Tibet Team Vegetation Group 13429 (PE00540478); Xigazê Prefecture: Gyangtse, 28°96'N, 88°8'E, 12 Jul 1953, P.C. Isoong 5692 (PE00540346); Raka Tsangpo valley, 4760 m a.s.l., 29°30'N, 86°17'E, 2 Sep 2003, G. & S. Miehe 03-062-10 (E00190600); Lhasa City: Namtso lake, 30°52'N, 91°03'E, 4720 m a.s.l., 2 Sep 2005, Nölling & Hanspach NX05-194-02 (herb. Miehe);

General distribution.

Tibet.

Figures

Figure 33. SEM micrographs of Corispermum fruits: A C. falcatum B C. nanum C C. pamiricum D C. dutreuilii var. montanum E C. dutreuilii var. dutreuilii F C. pseudofalcatum. Magnification: 30 x.

Figure 34. Distribution map of Corispermum falcatum (circles), C. nanum (stars), C. pamiricum (squares) and C. dutreuilii var. montanum (triangles).