Polygonatum binatifolium, a new species of Polygonatum (Asparagaceae) from Guizhou, China

HENG-XING ZHU; FEI-YI HUANG; HONG-YUAN CHEN; HONG-JING ZHANG; QIAN-LI DAI; SI-RONG YI

doi:10.11646/phytotaxa.549.2.11

Issue: Vol. 549 No. 2: 8 June 2022

Type: Article

Published: 2022-06-08

DOI: 10.11646/phytotaxa.549.2.11

Page range: 247-252

Abstract views: 26

PDF downloaded: 1

Polygonatum binatifolium, a new species of Polygonatum (Asparagaceae) from Guizhou, China

HENG-XING ZHU⁺⁻
FEI-YI HUANG⁺⁻
HONG-YUAN CHEN⁺⁻
HONG-JING ZHANG⁺⁻
QIAN-LI DAI⁺⁻
SI-RONG YI⁺⁻

Chongqing Academy of Forestry, Chongqing 400036, China

Chongqing Three Gorges Medical College, Chongqing404120, China; Chongqing Key Laboratory of Development and Utilization of Genuine Medicinal Materials in Three Gorges Reservoir Area, Chongqing 404120, China

Chongqing Academy of Forestry, Chongqing 400036, China

Chongqing Three Gorges Medical College, Chongqing404120, China; Chongqing Key Laboratory of Development and Utilization of Genuine Medicinal Materials in Three Gorges Reservoir Area, Chongqing 404120, China

Asparagaceae IUCN Polygonateae taxonomy Monocots

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Abstract

Polygonatum binatifolium, from Guizhou, China, is newly described and illustrated. The new species is morphologically most similar to P. cyrtonema in sharing an erect stem, pendulous flowers, glabrous peduncles and pedicels, campanulate, yellowish green perianths, and glabrous, included stamens, but differs by its shorter stems (20–50 cm vs. 50–100 cm), fewer leaves (5–9 vs. 10–15) of which the lowermost two being opposite, fewer flowers (up to 5 vs. up to 14), shorter peduncles (2–5 mm vs. 1–6 cm), shorter filaments (ca. 1.0 mm vs. 3–4 mm) and anthers (1.6–1.9 mm vs. 3.5–4.0 mm), smaller ovary (1.8–2.2 mm vs. 3.0–6.0 mm) and shorter styles (1.5–2.0 mm vs. 1.2–1.5 cm), and smaller berries (5.5–6.5 mm vs. 6–12 mm) and seeds (2.4–3.0 × 2.0–2.4 mm vs. 3.8–5.6 × 2.8–3.6 mm). The species can be categorized as Critically Endangered (CR).

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