Mitreola Linnaeus 1758
Creators: name: Liao, Jun-Jie
name: Chen, You-Shen
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Loganiaceae
Mitreola

description: 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
description: Published as part of Liao, Jun-Jie & Chen, You-Shen, 2021, Mitreola bullata sp. nov. (Loganiaceae), a new species from Yunnan, China, pp. 181-184 in Phytotaxa 487 (2) on page 183, DOI: 10.11646/phytotaxa.487.2.10, http://zenodo.org/record/5757443