裸柱橐吾 luo zhu tuo wu

Stem erect, ca. 30 cm tall, robust, hollow, sparsely arachnoid-pubescent. Petiole as long as leaf blade, unwinged, base sheathed; leaf blade dark green, ovate-cordate, ca. 16 × 12 cm, abaxially shortly brown pilose, adaxially sparsely pubescent, pinnately veined, abaxially with tenuous prominent reticulate veins, margin dentate, apex acute, or rounded in narrow basal leaves. Distal stem leaves smaller, transversely elliptic, margin dentate, apex entirely long caudate-mucronate. Synflorescence initially racemose, clustered, ca. 8 cm, pubescent; leaflike bracts linear; peduncles ca. 2 mm. Capitula numerous; supplementary bracts filiform. Involucre campanulate, ca. 8 mm, outside and margin shortly pilose; phyllaries 5, in 2 rows, oblong-lanceolate, apex acute; inner phyllaries membranous at margin. Outer florets female, 1 or 2, corolla absent; style naked. Tubular florets 5. Pappus white, shorter than tubular corolla. Fl. Jul, fr. Aug.

● Scrub; ca. 3600 m. SE Xizang (Nangxian).