taxonID	type	description	language	source
03B687E6FFB4FFC396E4FB8DFC2DE666.taxon	materials_examined	Type: — CHINA. Anhui: Qianshan, Mt. Tianzhushan, in moso bamboo plantations, 15 August 2024, X. - X. Zhu, H. Wang & M. - H. Wang s. n. [holotype NPH (herb. no. NPH 3006!)].	en	Chen, Yue, Shen, Yun, Wan, Kai-Yuan, Pan, Bo, Jiang, Kai-Wen (2025): Apios brevis (Fabaceae: Papilionoideae: Phaseoleae), a new species from eastern China. Phytotaxa 725 (2): 205-212, DOI: 10.11646/phytotaxa.725.2.7, URL: https://doi.org/10.11646/phytotaxa.725.2.7
03B687E6FFB4FFC396E4FB8DFC2DE666.taxon	diagnosis	Diagnosis: — Leaves imparipinnate 3 - foliolate; leaflet margins slightly undulate. Inflorescence a short pseudoraceme, 2.2 – 3.0 cm long. Corolla greenish white, bilaterally asymmetric; standard ca. 10 mm long; wing petals ca. 5.0 mm long; keel petals curved to nearly semicircular, ca. 7.5 mm long.	en	Chen, Yue, Shen, Yun, Wan, Kai-Yuan, Pan, Bo, Jiang, Kai-Wen (2025): Apios brevis (Fabaceae: Papilionoideae: Phaseoleae), a new species from eastern China. Phytotaxa 725 (2): 205-212, DOI: 10.11646/phytotaxa.725.2.7, URL: https://doi.org/10.11646/phytotaxa.725.2.7
03B687E6FFB4FFC396E4FB8DFC2DE666.taxon	description	Description: — Slender, herbaceous, twining climbers, deciduous with above-ground parts dying back in winter. Roots slightly thickened, tubers not seen. Branches green to dark purple, striate when dry, sparsely to moderately pubescent with pale, sub-appressed hairs, slightly denser at nodes. Leaves imparipinnate 3 - foliolate. Stipules linear, ca. 1.5 mm, moderately pubescent. Petiole and rachis green to dark purple, slender, hairy as branches but with shorter hairs; petiole 2.6 – 4.0 cm, with a basal pulvinus 2 – 4 mm, somewhat swollen, sparsely hairy; rachis 1.1 – 1.6 cm. Petiolules ca. 2 mm, sparsely pubescent with pale, ± ascending hairs. Stipels not observed. Leaflets thinly chartaceous, ovate-lanceolate; margins slightly undulate; broadly cuneate to sub-truncate at base, acuminate with an acumen at apex; lateral leaflets obviously smaller, asymmetric at base, 3.5 – 4.5 × 2.4 – 2.9 cm, acumen 6 – 8 mm; terminal leaflet 6.0 – 6.6 × 3.5 – 4.0 cm, acumen 1.0 – 1.2 cm; adaxial surface dark green, subglabrous, only sparsely pubescent with pale, ± ascending hairs along midvein; abaxial surface grayish green, subglabrous, only sparsely pubescent with pale, ± ascending hairs along veins; midvein and lateral veins often dark purple abaxially, especially at basal part; lateral veins 4 – 5 pairs, anastomosing; tertiary veins reticulate. Inflorescence a nodose pseudoraceme, axillary, solitary, 2.2 – 3.0 cm; axis striate when dry, sparsely pubescent with pale, sub-appressed hairs; nodes swollen, usually 3 - flowered. Bracts not observed. Pedicels 2 – 3 mm, sparsely pubescent with pale, ± ascending hairs. Bracteoles 2, subtending the calyx, linear, ca. 0.5 mm, brownish when dry, caducous. Flowers ca. 8 mm long. Calyx campanulate, ± bilabiate, upper lip ca. 1.5 × 1.0 mm, lower lip ca. 3.0 × 2.0 mm, or sometimes shallowly 4 - lobed with the lowest lobe the longest; external surface sparsely puberulent, denser along calyx mouth. Corolla greenish white, bilaterally asymmetric, upper half of keel twisted to one side; standard incompletely opening with apex nearly adnate to keel apices, broadly obovate, ca. 10 × 6.8 mm, somewhat hooded, with a pink patch on lower part of inner surface, auriculate ca. 0.5 mm, claw ca. 1.3 mm; wing petals sub-oblong, ca. 5.0 × 2.0 mm, auriculate ca. 1.3 mm, claw ca. 2.0 mm; keel petals curved to nearly semicircular, ca. 7.5 × 2.0 mm, claw ca. 2.5 mm. Stamens (9 + 1) diadelphous, ca. 7.5 mm, sheath of nine fused stamens folded into S-shape; filaments glabrous; anthers dorsifixed, ca. 0.5 mm. Pistil ca. 1.0 cm long; ovary glabrous; style glabrous, coiled toward one side at apex; stigma capitate. Pods linear-falcate, ca. 11.0 × 0.6 cm, valves coriaceous, elastically dehiscent along both sutures when mature, surface glabrous but punctate with raised, scattered dots, brownish when mature, somewhat thickened along both sutures; septa present between seeds, brownish, loose and falling easily. Seeds ellipsoid, smooth, black with brownish yellow mottled patterns, or vice versa, ca. 4.5 × 3.5 × 3.5 mm; hilum oblong, ca. 1.0 mm.	en	Chen, Yue, Shen, Yun, Wan, Kai-Yuan, Pan, Bo, Jiang, Kai-Wen (2025): Apios brevis (Fabaceae: Papilionoideae: Phaseoleae), a new species from eastern China. Phytotaxa 725 (2): 205-212, DOI: 10.11646/phytotaxa.725.2.7, URL: https://doi.org/10.11646/phytotaxa.725.2.7
03B687E6FFB4FFC396E4FB8DFC2DE666.taxon	distribution	Distribution and ecology: — Apios brevis is currently known from Qianshan County, Anhui Province, China, based on herbarium specimen records (Fig. 4). Additionally, according to Dr. Xin-Xin Zhu (pers. comm.), this species has also been observed in Yuexi County, Anhui Province.	en	Chen, Yue, Shen, Yun, Wan, Kai-Yuan, Pan, Bo, Jiang, Kai-Wen (2025): Apios brevis (Fabaceae: Papilionoideae: Phaseoleae), a new species from eastern China. Phytotaxa 725 (2): 205-212, DOI: 10.11646/phytotaxa.725.2.7, URL: https://doi.org/10.11646/phytotaxa.725.2.7
03B687E6FFB4FFC396E4FB8DFC2DE666.taxon	etymology	Etymology: — The specific epithet brevis (Latin: short, small) refers to the short inflorescences of Apios brevis. The standard Chinese name of Apios brevis is here given as DZñ 土圞儿 / DZñ 土圞兒 (duǎn xù tǔ luán ér), which is a direct translation of the scientific name. Taxonomic remarks: — Morphologically, Apios brevis is most like the widely distributed A. fortunei. Both species share greenish-white corollas that are bilaterally asymmetric with the upper part of the keel twisted to one side. However, A. brevis can be distinguished from A. fortunei by its consistently 3 - foliolate leaves (vs. leaves with 3 – 7 leaflets) with slightly undulate leaflet margins (vs. entire leaflets); shortened pseudoracemes 2.2 – 3.0 cm long (vs. pseudoracemes elongate, 6.0 – 22.0 cm) with densely arranged flowers (vs. sparsely arranged flowers); and smaller flowers ca. 0.8 cm long (vs. ca. 1.1 cm long).	en	Chen, Yue, Shen, Yun, Wan, Kai-Yuan, Pan, Bo, Jiang, Kai-Wen (2025): Apios brevis (Fabaceae: Papilionoideae: Phaseoleae), a new species from eastern China. Phytotaxa 725 (2): 205-212, DOI: 10.11646/phytotaxa.725.2.7, URL: https://doi.org/10.11646/phytotaxa.725.2.7
03B687E6FFB4FFC396E4FB8DFC2DE666.taxon	description	Apios brevis also resembles A. chindiana 1 in its slightly undulate leaflet margins; however, A. brevis differs from A. chindiana in its consistently 3 - foliolate leaves (vs. leaves with 3 – 5 leaflets) with generally more chartaceous (thinly chartaceous) leaflets (vs. membranous-chartaceous); shortened pseudoracemes 2.2 – 3.0 cm long (vs. elongated pseudoracemes, 7.2 – 22.0 cm); smaller flowers ca. 0.8 cm long (vs. ca. 1.9 cm long); greenish white corolla that is bilaterally asymmetric with the upper part of the keel twisted to one side (vs. reddish to dull red corolla, bilaterally symmetric); a larger ratio (ca. 0.67) of wing petal length to standard petal length (vs. ca. 0.47); and its stamen sheath folded into S-shape (vs. stamen sheath only slightly twisted toward apex).	en	Chen, Yue, Shen, Yun, Wan, Kai-Yuan, Pan, Bo, Jiang, Kai-Wen (2025): Apios brevis (Fabaceae: Papilionoideae: Phaseoleae), a new species from eastern China. Phytotaxa 725 (2): 205-212, DOI: 10.11646/phytotaxa.725.2.7, URL: https://doi.org/10.11646/phytotaxa.725.2.7
