Corispermum pseudofalcatum Tsien & C.G.Ma in Kung & al., Acta Phytotax. Sin. 16(1): 119 (1978)

Sukhorukov, Alexander P., Liu, Pei-Liang & Kushunina, Maria, 2019, Taxonomic revision of Chenopodiaceae in Himalaya and Tibet, PhytoKeys 116, pp. 1-141 : 87

5. Corispermum pseudofalcatum Tsien & C.G.Ma in Kung & al., Acta Phytotax. Sin. 16(1): 119 (1978)

Holotype.

CHINA, Xizang, vicinity of Xigazê (Rikaze), farmland edge, 3800 m a.s.l., [without exact date] 1960, Fu Guo-Xun 789 (PE00934050!).

Description.

Annual to 20 cm, branched at base, (almost) glabrous. Leaves lanceolate, oblanceolate or oblong, 10.0-30.0 × 3.0-5.0 mm, continuously turning into imbricate bracts. Inflorescence elongated. Bracts lanceolate, appressed to the stem or obliquely orientated, not or slightly recurved, completely covering the fruit. Fruit 4.5-5.5 mm long, glabrous but with scattered warts and tanniniferous pigments, apically emarginate (Fig. 33F ), thick (0.7-1.0 mm). Wing clearly visible (0.70)0.90-1.40 mm, denticulate, narrowly triangular in cross-section. Pericarp detachments not detected. Sclereids in medium fruit part with 1-2 inner layers (orientated parallel to the fruit axis).

Habitat.

Screes and sandy riverbeds; 3000-4200 m a.s.l.

Phenology.

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

Distribution.

This species is known only from the type locality (Fig. 35 ). Both morphological and carpological characters as well as its record in South Tibet indicate its affinity to C. lhasaense .

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 35. Distribution map of Corispermum dutreuilii var. dutreuilii (circles), C. pseudofalcatum (star) and C. lhasaense (triangle).