Helianthemum songaricum Schrenk

Helianthemum songaricum is easily distinguished from other C Asian species by the spine-tipped branches and stipulate leaves. It was listed as rare by Zhou (in Fu & Jin, China Pl. Red Data Book 1: 218-219. 1992).

Shrubs dwarf, densely branched, cushionlike, 5-12 cm tall. Old branches brown; branchlets opposite or nearly opposite, tightly appressed white pubescent when young, glabrescent, apex spinose. Leaves opposite; stipules subulate or linear-lanceolate, ca. 0.8 mm, longer than petiole, apex acute; petiole short to almost absent; leaf blade simple, lanceolate or narrowly ovate, 5-7(-10) × 1-3 mm, leathery, both surfaces white puberulous, margin entire, often revolute; midrib slightly impressed. Flowers solitary at tips of branches, 1-1.2 cm in diam.; pedicel 0.6-1 cm, white villous. Sepals 5, unequal, abaxially densely white puberulous; outer 2 sepals linear, ca. 2 mm; inner 3 sepals ovate, 5-7 mm, abaxially 3-ridged. Petals yellow or orange-yellow, obovate, ca. 8 mm, base cuneate. Stamens ca. 1/2 as long as petals; anthers yellow. Ovary ca. 1.5 mm, densely puberulous; style ca. 5 mm. Capsule ovoid, 5-8 mm, puberulous. Seeds brown, ovoid, ca. 3 mm, angled, reticulate-striate, sometimes rugose, apex acuminate.

Gansu, Nei Mongol, Xinjiang [C Asia].

Rocky hills and slopes in steppe-desert regions; 1000-1400 m.

Helianthemum ordosicum Y. Z. Zhao et al.

Helianthemum songaricum là một loài thực vật có hoa trong họ Nham mân khôi. Loài này được Schrenk mô tả khoa học đầu tiên năm 1841.