Eugenia (sect. Schizocalomyrtus) Mattos 2005
Creators: name: Giaretta, Augusto
name: Lucas, Eve
name: Sano, Paulo Takeo
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Myrtales
Myrtaceae
Eugenia

description: Key to the species of Eugenia sect. Schizocalomyrtus
1. Stamens curved in the bud in longitudinal section (Figure 2B); staminal whorls extend to two-thirds of the bud length and deeply tearing at anthesis; fruits densely puberulent and crowned by the remnants of the hypanthium with scars left from stamen insertion ............................................................................................................................................... 5. Eugenia longohypanthiata
- Stamens straight in the bud in longitudinal section; staminal whorls flat (Figure 1C) and not tearing at anthesis or less often tearing slightly; fruits glabrous or sometimes densely puberulent and crowned by the reminiscence of the calyx lobes ........................... 2
2. Calyx lobes apparently free but fused at the base to ca. 1 mm long; fruit crowned by the calyx that tears longitudinally by 1 mm long ..................................................................................................................................................................... 2. Eugenia arvensis
- Calyx lobes partially fused to at least 2 mm to completely closed (Figure 2D, E); fruits crowned by the calyx that tears evidently, longitudinally or transversely ........................................................................................................................................................... 3
3. Calyx lobes tearing transversely resulting in a calyptra-like structure (Figure 2F); fruits usually crowned by the calyx that opens via a calyptra-like structure .............................................................................................................................................................. 4
- Calyx lobes tearing longitudinally resulting in 3–4 lobes; fruits crowned by 3–4 calyx lobes ........................................................ 5
4. Inflorescence thyrsoid, terminal or subterminal; bud closed at the tip leaving an apiculum; bracteoles deciduous after anthesis; ovary with 3–5 ovules per locule ................................................................................................................. 4. Eugenia guanabarina
- Inflorescence fasciculiform, terminal or axillary; bud partially fused and nearly closed leaving four vestigial free lobes at the tip (Figure 2E); bracteoles persistent after anthesis; ovary with 9–15 ovules per locule ............................... 6. Eugenia neoriedeliana
5. Leaves dense puberulent abaxially, persistent; the innermost intramarginal vein 4.5–10 mm from the margin; bud tears irregularly at anthesis in 3–4 lobes; fruits 30–45 mm diam. and crowned by the remnant of the irregular calyx lobes ...................................... ...................................................................................................................................................................... 10. Eugenia vattimoana
- Leaves glabrous, pubescent or tomentose abaxially, glabrescent; the innermost intramarginal vein 1.5–5 mm from the margin; bud tears regularly at anthesis in 4 lobes; fruits 7–20 mm diam. and crowned by the remnant of the regular calyx lobes .................... 6
6. Leaves with 5–7 secondary veins, petioles 1.5–5 mm long; bracteoles persistent in the fruit; fruit red when ripe ............................ ..................................................................................................................................................................... 8. Eugenia subterminalis
- Leaves with 9–22 secondary veins, petioles 5–18 mm long; bracteoles deciduous before or after anthesis; fruit artropurpureum or yellowish when ripe .......................................................................................................................................................................... 7
7. Bud glabrous outside, calyx lobes equal in size ............................................................................................................................... 8
- Bud puberulent outside, pubescent or tomentose, calyx lobes two unequal pairs in size ................................................................ 9
8. Young leaves glabrous; buds 5–7 × 4–6.5 mm, calyx lobes 2.5–4 × 2.5–3 mm; staminal whorl 4–5 mm diam., rounded ................ .......................................................................................................................................................................... 3. Eugenia dichasiata
- Young leaves with trichomes 0.2–0.4 mm long, appressed, glabrescent; buds 9–11 × 8–9 mm, calyx lobes 4–8 × 4–9 mm; staminal whorl 9–10 mm diam., squared .................................................................................................................... 7. Eugenia paradisiaca
9. Leaves with secondary veins 11–22 per side; inflorescence rachis 3–30 mm, pubescent, up to one rachis per axil; buds 6–8 × 4.5–7 mm, staminal whorl 4.5 mm diam.; fruits ellipsoid, yellowish when ripe .... ..................................................... 1. Eugenia acutata
- Leaves with secondary veins 9–12 per side; inflorescence rachis 0.5–5 mm, puberulent or tomentose, up to two rachises sharing the same axil; buds 3–5 × 2.5–5 mm, staminal whorl 3 mm diam.; fruits globose, artropurpureo when ripe .................................... ............................................................................................................................................................... 9. Eugenia tenuipedunculata
description: Published as part of Giaretta, Augusto, Lucas, Eve & Sano, Paulo Takeo, 2021, Taxonomic monograph of Eugenia sect. Schizocalomyrtus (Myrtaceae: Myrteae), a group within Eugenia with unusual flowers, pp. 135-177 in Phytotaxa 524 (3) on page 138, DOI: 10.11646/phytotaxa.524.3.1, http://zenodo.org/record/5649288