Pseudocodon petiolatus D. Y. Hong & Q. Wang, 2015

Wang, Qiang & Hong, De-Yuan, 2015, Taxonomic revision of the genus Pseudocodon (Campanulaceae) based on character analysis and molecular phylogeny, Phytotaxa 204 (1), pp. 49-64 : 62-63

7. Pseudocodon petiolatus D. Y. Hong & Q. Wang , sp. nov. Fig. 5 .

Type:— CHINA. Sichuan, Muli, 913 Farm , Zhamin , 2600 m, thickets, 23 August 1983, Qinghai-Xizang Exped. 13331 (holotype PE [No. 1280549 ]; isotype PE [No. 1280611 ]) .

Herbs perennial, glabrous throughout except for ciliate filaments. Roots more or less carrot-shaped, longer than 15 cm, 1.3 cm in diameter. Stems twining, slender, over 1 m long. Leaves alternate; petiole 1.5–2.5 cm long; leaf blade cordate to ovate, base cordate, truncate to rounded, apex obtuse to acute, 2–3.5 cm long, 1.5–2.5 cm wide, margin entire to shallowly crenulate. Flowers solitary, terminal on main stem. Hypanthium obtriangular; calyx lobes 5, strongly reflexed even at anthesis, linear-lanceolate, entire, 7–9 mm long, 3–3.5 mm wide. Corolla blue, 5-lobed to near base, rotate; corolla lobes elliptic, ca 2 cm long, 1 cm wide. Stamens free; filaments 4 mm long, basal part strongly dilated into triangular, ciliate; anthers 4 mm long. Ovary inferior; style glabrous, ca 2 mm long; stigma 3-fid, stigma lobes elliptic-oblong, ca 4 mm long, 2.5 mm wide. Fruit unknown.

Pseudocodon petiolatus differs distinctly from all other species of the genus in having elongate roots, long petioles, strongly reflexed calyx lobes, and large stigma lobes.

Distribution:—Endemic to China: SW Sichuan.

Figures

FIGURE 5. Pseudocodon petiolatus D. Y. Hong & Q. Wang. 1, plant. 2, root. 3, stamens & ovary. The illustration was drawn by Ai-Li Li.