Mitreola bullata sp. nov. (Loganiaceae), a new species from Yunnan, China Author Liao, Jun-Jie 0000-0002-5361-7413 South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, China. & 2418621808 @ qq. com; https: // orcid. org / 0000 - 0002 - 5361 - 7413 2418621808@qq.com Author Chen, You-Shen 0000-0002-7729-1075 South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, China. & yschen @ scbg. ac. cn; https: // orcid. org / 0000 - 0002 - 7729 - 1075 yschen@scbg.ac.cn text Phytotaxa 2021 2021-02-24 487 2 181 184 http://dx.doi.org/10.11646/phytotaxa.487.2.10 journal article 4472 10.11646/phytotaxa.487.2.10 deab1dde-e979-4312-9c5a-5e34cecee4e5 1179-3163 5757443 Key to species of Mitreola in China 1. Perennials ...........................................................................................................................................................................................3 - Annuals...............................................................................................................................................................................................2 2. Plants 5–10 cm tall; leaf blade 0.5–2 cm long; stems terete ...................................................................................... M. petiolatoides - Plants 10–50 cm tall; leaf blade 4–7 cm long; stems 4-angled ........................................................................................ M. petiolata 3. Stem 4-angled or acaulescent; leaf petiolate or sessile; inflorescences terminal ...............................................................................8 - Stem terete; leaf petiolate; inflorescences terminal or axillary ..........................................................................................................4 4. Stems erect; stamens inserted at corolla tube base.................................................................................................................... M. liui - Stems erect or creeping; stamens inserted at or near corolla tube middle..........................................................................................5 5. Lateral vein 4–6 pairs; bracts linear .................................................................................................................................. M. pingtaoi - Lateral veins 7–10 pairs; bracts narrowly elliptic or lanceolate.........................................................................................................6 6. Plants 3.0– 8.5 cm tall, leaf blade bullate, veins in abaxial surface purplish red, corolla light purple .................. M. bullata sp. nov. - Plants up to 60 cm tall, leaf blade smooth, veins in abaxial surface green, corolla white .................................................................7 7. Leaf apex acute; stipules triangular; stems erect, nearly terete ............................................................................... M. yangchunensis - Leaf apex acuminate to obtuse; stipules degeneration or reduce to a narrow leaf sheath between petioles; stems creeping branchlets 4-angled when young, becoming terete......................................................................................................................... M. pedicellata 8. Stems conspicuous, creeping; leaves occurring along length of stem or clustered at stem apex, petiole 0.3–1.2 cm long................. ......................................................................................................................................................................................... M. reticulata - Stems inconspicuous; leaves in a basal rosette, sessile ......................................................................................................................9 9. Leaf blade 3.5–7 cm long, apex acute, nerves purple abaxially; capsule horns incurved..................................... M. purpureonervia - Leaf blade 7–30 cm long, apex obtuse to rounded, nerves light green; capsule horns erect ...........................................................10 10. Leaf blade spathulate to oblanceolate; 5–7 veins on each side; stamens inserted at the middle of corolla tube ....... M. spathulifolia - Leaf blade long obovate, rarely oblanceolate, 7–10 veins on each side; stamens inserted at the top of corolla tube M. macrophylla