Monteiroa

Key to species of Monteiroa View in CoL

1. Leaves unlobed, lanceolate, oblong, linear-lanceolate, lanceolate-ovate or narrowly elliptic, sometimes subsessile, mainly in fertile stems...................................................................................................................................................................................................2

- Leaves usually 3–5-lobed (rarely unlobed) or triangular, with greater petioles in fertile stems, not subsessile................................6

2. Leaves bullate, with simple (rarely stellate) trichomes at apex of blisters; abaxial surface of leaves stellate-tomentose; epicalyx mainly stellate-tomentose, glabrous at margins ...................................................................................................... Monteiroa bullata View in CoL

- Leaves plain or with veins in grooves but not bullate, indument glabrate, arachnoid or with simple trichomes on the adaxial surface; abaxial surface of leaves glabrous, with sparse stellate trichomes or strigose; epicalyx glabrous or with sparse trichomes, sometimes ciliate at margins...............................................................................................................................................................3

3. Corolla red; petals 5–10 mm long; mericarps 2–3 × 1.2–2 mm, sparsely stellate trichomes apically and on the upper portion of the dorsal surface, stellate branches/arms up to 0.3 mm long......................................................................................... Monteiroa rubra View in CoL

- Corolla pink; petals more than 10 mm long; mericarps 3.5–5 × 3–4 mm, densely stellate-hirsute apically and on the upper portion of the dorsal surface, stellate branches/arms to 1.5 or 2 mm long .....................................................................................................4

4. Plants glabrate or with arachnoid young stems and inflorescences; epicalyx inserted 1–2 mm below the calyx; leaves glabrate or sparsely arachnoid on both surfaces.............................................................................................................. Monteiroa ptarmicifolia View in CoL

- Plants glabrate or with stellate trichomes; epicalyx adnate to the calyx; leaves with stellate trichomes on abaxial surface and glabrate or with simple or bifid trichomes on adaxial surface ...........................................................................................................5

5. Young stems glabrate, trichomes 1 mm long; adaxial surface of leaves usually glabrate, rarely with simple trichomes, usually with flat veins or in slightly grooves; abaxial surface with sparse stellate trichomes, arms/branches of stellate trichomes up to 0.5 mm long......................................................................................................................................................................... Monteiroa dusenii View in CoL

- Young stems densely stellate hirsute, trichomes 1,5– 2 mm long; adaxial surface of leaves with simple or bifid trichomes, with veins in grooves; abaxial surface with stellate trichomes with arms/branches up to 1–1.5 mm long....................... Monteiroa reitzii View in CoL

6. Corolla persistent in fruit; epicalyx bracts 3–4 mm long, shorter than calyx.................................................... Monteiroa glomerata View in CoL

- Corolla early caducous; epicalyx bracts 6–20 mm long, equal or exceeding the calyx.....................................................................7

7. Leaves 2–5 times longer than wide; epicalyx bracts 10 × 2–3 mm....................................................................................................8

- Leaves equal or sub-equal in length and width; epicalyx bracts (9–)1.1–19 × (2–) 4–10 mm...........................................................9

8. Leaves 10–12 × 3,5–4,5 cm, lanceolate or oblong, adaxial surface bullate, with simple or bifid trichomes on blisters ..................... .................................................................................................................................................................................... Monteiroa leitei View in CoL

- Leaves up to 9–10 × 3, 5 cm, triangular, adaxial surface plain, not bullate, with simple trichomes, rarely bifid or stellate................ ................................................................................................................................................................... Monteiroa triangularifolia View in CoL

9. Prostrate or scrambling shrubs; leaves bullate, adaxial surface with simple trichomes; stems stellate-hispid.................................... ...................................................................................................................................................................... Monteiroa catharinensis View in CoL

- Erect, erect-cespitose or scrambling shrubs; leaves adaxial surface with stellate trichomes; stems stellate-incanous or stellate-pubescent ..........................................................................................................................................................................................10

10. Erect-cespitose or scrambling shrubs; stems stellate incanous; calyx 10–19 mm long ................................ Monteiroa hatschbachii View in CoL

- Erect shrubs; stems stellate-pubescent; calyx 6–9 mm long ................................................................................... Monteiroa smithii View in CoL