Corispermum pseudofalcatum C. P. Tsien & C. G. Ma

Corispermum pseudofalcatum is closely related to C. falcatum. Additional studies of the variability patterns of these entities would be desirable to clarify their status.

Plants ca. 20 cm tall. Stem erect, terete, sparsely stellate hairy, branched from base; lower branches ascending, upper ones obliquely spreading. Leaves linear, 2-3 cm × ca. 3 mm, fleshy, 1-veined, sparsely stellate hairy, base attenuate, apex acute, mucronate. Spikelike inflorescence terete, crowded; bracts lanceolate to narrowly ovate, 0.6-1.5 cm × 2-3 mm, narrower than utricle, usually 1-veined, base attenuate to rounded, margin membranous on upper bracts, apex acute to acuminate. Perianth segment 1, ovate or oblong-ovate, ca. 1.5 mm, apex rounded, irregularly denticulate. Stamens 1(or 3), ca. 1.5 × as long as perianth. Utricle yellow-green, obovate, 4.5-5 × 3.5-4.5 mm, irregularly rugose abaxially, glabrous, base cordate or subcordate, apex shallowly emarginate; wing yellow-green, ca. 1 mm wide, margin irregularly denticulate; beak ca. 1.5 mm, apex 1/5-1/4 as long as beak. Fl. and fr. Jul-Aug.

* High elevations. Xizang (Xigazê).

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).

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.