Brunellia species

Böhnert, Tim & Weigend, Maximilian, 2017, Brunellia (Brunelliaceae) in Peru-distribution, a new species and a key, Phytotaxa 329 (2), pp. 101-113 : 104

Key to the Peruvian Brunellia species

1. Leaves pinnate (imparipinnate & paripinnate), rarely simple, if simple then leaves broadly oval, margins crenate ( B. ovalifolia ) (Sect I. Brunellia ) ............................................................................................................................................................................. 2

- Leaves simple (Sect II. Simplicifolia) ........................................................................................................................................… 11

2. Leaves opposite; rarely three per node ............................................................................................................................................. 3

- Leaves three per node, imparipinnate with 3–5 leaflets, rarely undivided ................................................................. 9. B. ovalifolia

3. Calyx 4–7(–8) mm in diam.; endocarp 2–4 mm long ...................................................................................................................... 4

- Calyx 8–16(–17) mm in diam.; endocarp more than 4.5 mm long .................................................................................................. 8

4. Leaflets with (10–)12–17(–18) pairs of secondary veins, margins mostly biserrate or bicrenate ........................... 10. B. sibundoya

- Leaflets with 17–25 pairs of secondary veins, margins serrate or crenate ....................................................................................... 5

5. Branchlets puberulent, soon glabrous ............................................................................................................................................... 6

- Branchlets tomentose or pubescent .................................................................................................................................................. 7

6. Petiole 5–12 cm; blades rigidly chartaceous, brownish, secondary veins 17–22, 4–6 mm apart, with an angle of divergence of 50°–65°, petiolules 1–4 mm long; calyx 4–5 mm diam.; follicles elliptic–ovoid, 2.5–2.8 mm long .................... 11. B. stenoptera

- Petiole 2.5–6.0 cm; blades membranaceous, green beneath with yellowish venation, secondary veins 21–25, 2–5 mm apart, with an angle of divergence of 70°–76°, petiolules 0.5–1.5 mm long; calyx 5.5–6.0 mm diam.; follicles ovoid–rotund, 4 mm long ....... .................................................................................................................................................................................. 3. B. cutervensis

7. Leaves opposite, 5–9 jugate; petiole 6–9 cm long; leaflet elliptic–oblong, sublanceolate, base asymmetrically and acutely cuneate, apex attenuate and acuminate, yellowish–gray tomentose–pubescent beneath, venular reticulum flat; calyx 5.0– 5.5 mm diam. ..... ........................................................................................................................................................................... 5. B. dichapetaloides

- Leaves opposite, 4–6 jugate; petiole 3.5–6.0 cm long; leaflet oblong–lanceolate, base asymmetric and subcordate–rounded, apex acute–acuminate, sparsely brownish patent–tomentulose beneath, venular reticulum slightly prominulous; calyx 7 mm diam. ...... ....................................................................................................................................................................................... 2. B. brunnea

8. Indumentum lanate; leaves opposite, 2–4-jugate, rarely 3-foliolat; leaflets 9–20 cm long and 3–8 cm wide, with 22–27 secondary veins, double or simple crenate–serrate ..................................................................................................................... … 8. B. inermis

- Indumentum of straight or slightly flexuous, spreading or appressed, or acroscopically appressed trichomes, or glabrous; leaves opposite (3–)4–7 jugate, leaflets 4–12 cm long and 1–5 cm wide, with 17–25 pairs of secondary veins, simply serrate or crenate. ........................................................................................................................................................................................................... 9

9. Secondary veins with an angle of divergence of 50°; calyx when expanded 12–17 mm diam. ............................... 4. B. cuzcoensis

- Secondary veins with an angle of divergence of 70°–80°, calyx when expanded 8–9 mm diam. .............................................… 10

10. Leaflets completely glabrous, nitid, with venular reticulum prominent and conspicuous above, prominulous beneath; flowers mostly 5-merous. ................................................................................................................................................. 12. B. weberbaueri

- Leaflets pilose on the main veins above, copiously pubescent with more or less appressed hairs beneath; venular reticulum irregular, impressed at the rugose surface above, slightly prominulous and rather lax beneath; flowers 6-merous ........ 7. B. hexasepala

11. Leaves 5–10 cm long and 2–4 cm wide, leaves elliptic, apex obtuse ......................................................................... 1. B. briquetii

- Leaves 10–20 cm long and 3–8 cm wide, apex acute or shortly acuminate ..............................................................................… 12

12. Leaves usually three per node, only smaller shoots with opposite leaves, lanceolate-ovate, base rounded or truncate ..................... ........................................................................................................................................................................................ 13. B. lobinii

- Leaves opposite, oblanceolate, base long attenuate ......................................................................................................... 5. B. dulcis