Corresponding author: Xiaoguo Xiang (
Academic editor: Alan Paton
Wu Z, Guo Z, Deng C, Li Z, Xiang X (2019)
During our expedition to Xingyi City, Guizhou Province, China in 2017, we collected two populations of
Distribution of
Morphological observations and measurements of the new species were carried out, based on living plants and dry specimens (PE, QNUN and XIN). The photographs were taken in the field. All morphological characters were studied under dissecting microscopes and are described using the terminology presented by
China. Guizhou: Xingyi City, Maling River Valley,
Morphological comparisons between
|
|
|
|
|
---|---|---|---|---|
|
||||
Petiole | 3–6 cm | 0.6–6 cm | 0.5–6.5 cm | 0.5–5.5 cm |
adaxial surface | green, sparsely pubescent | deep green, glabrous | green, glabrous | deep green, glabrous or sparsely pubescent |
abaxial surface | pale green, glabrous | pale green or pale purple, glabrous | pale green or purple, glabrous | pale green, glabrous or sparsely pubescent |
Veins on each side of midrib | 5–9 | 4–10 | 4–8(-9) | 5–6 |
|
||||
Peduncle | 2–3 cm long | 0.2–0.4 cm long | 0.5–6.5 cm long | 2–4(-13) cm long |
Involucre | 2–3 cm in diameter | 1.8–2.3 cm in diameter | 1–2.5 cm in diameter | 1.5–2.2 cm in diameter |
Corolla | 4–5.5 cm long, outside white, glabrous | 3.8–4 cm long; outside pink, sparsely glandular-puberulent | 3.0–4.8 cm long, outside white, pale yellow or pink, sparsely glandular-puberulent | 3.5–4.2 cm long, outside white, sparsely glandular-puberulent |
Tube | 3.5–4.5 cm long | 3–3.1 cm long | 2.3–3.3 cm long | 2.8–3.5 cm long |
Filaments | 1.8–2 cm long | 1.2–1.5 cm long | 1.0–1.3 cm long | 0.8–1.3 cm long |
Anther | ovate-elliptic, 2–3 mm long | subovate, ca. 3 mm long | elliptic, 3–3.2 mm long | elliptic, 3–4 mm long |
Staminodes | 2 | 2 | 2 | 3 |
Pistil | 2–2.5 cm long | ca. 1.5 cm long | 1.7–2.5cm long | 3.2–3.5 cm long |
Capsule | 2–3 cm long | 1.8–2.4 cm long | 1.5–2.5 cm long | 1.5–2.2 cm long |
Perennial herbs. Stems ascending, subterete, 40–100 cm tall, 2–5 mm in diameter, simple, sparsely purple-spotted, glabrous, juicy when fresh, nodes 5–10, not swollen. Leaves opposite, herbaceous; petiole 3–6 cm long, about 2 mm in diameter, almost terete, adaxially valleculate, margin erect and rounded, glabrous, green; leave blade oblong-lanceolate or ovate-lanceolate, 7–15 cm long, 3–5.5 cm wide, apex acuminate, rarely acute, margin repand-crenate, base usually oblique, adaxial surface green, sparsely pubescent, abaxial surface pale green, glabrous; lateral veins 5–9 on each side of midrib. Cymes subterminal, sometimes axillary, 4–8-flowered; peduncle 2–3 cm long, 3–4 mm in diameter glabrous, sparsely purple-spotted; involucre subglobose or broad ovoid, 2–3 cm in diameter, yellow-green, glabrous, apex acute. Pedicel 3–5 mm long, 2–3 mm in diameter, glabrous. Calyx white, 5-parted from the base, lobes equal, ovate-lanceolate, 1.2–1.6 cm × 0.3–0.4 cm, glabrous. Corolla white, with mauve lines and spots inside, 4–5.5 cm long, glabrous. Corolla tube 3.5–4.5 cm long, 1–1.4 cm in diameter at the mouth, 4–5 mm in diameter at the base, purple-spotted at throat, densely glandular-pubescent inside adaxial gibbous side of the tube, inside with a ring of hairs adnate to 7–8 mm above the corolla tube base; limb 2-lipped; adaxial lip 0.8–1.0 cm long, 2-lobed at apex, lobes equal, nearly semi-orbicular, abaxial lip 1–1.2 mm long, 3-parted, lobes subequal, oblong. Stamens 2, anthers fused by adaxial surfaces, adnate to 0.8–1 cm above the corolla base; filaments linear, glabrous, geniculate from the middle, 1.8–2 cm long, about 1 mm wide; anthers ovate-elliptic, glabrous, ca. 2–3 mm long, 2 mm wide, coherent at apex. Staminodes 2, glabrous, adnate to 1.2–1.5 cm above the corolla base, thick, 1.2–1.4 cm long, about 1 mm wide, apex capitellate, separate. Pistil 2–2.5 cm long; ovary linear, 0.7–0.9 cm long, 1.5–2.2 mm in diameter, glabrous; style 1.3–1.6 mm long, glabrous; stigma capitate, about 2 mm in diameter. Capsule linear-lanceolate, 2–3 cm long, 2–4 mm in diameter, glabrous, slightly curved.
Flowering occurs in August to October and fruiting in October to November.
The specific epithet refers to the corolla colour of this new species.
CHINA. Guizhou: Xingyi City, Maling River Valley, ca. 950 m alt., 12 October 2018,
To date,
This study was supported by the National Natural Science Foundation of China (Grant no. 31370227, 31300181, 31670212), Special Funds for Traditional Chinese Medicine Industry (201407003), Major supporting funds for Characteristic subject of Qiannan Normal College for Nationalities (No. QNSY2018XK003) and the Natural Science Foundation of Guizhou Province of China ([2014]2156).