7914.000 Thunbergia Retz.

Key to species

1Plants erect2
1Plants climbing or trailing6
2Leaves markedly rough to the touch; flowers cream to yellowThunbergia huillensis
2Leaves smooth or very slightly rough to the touch; flowers various colours3
3Leaves irregularly serrate with long (> 5 cm) petioles; flowers usually white, less often blue; E onlyThunbergia petersiana
3Leaves very shortly stalked or sessile4
4Small (c. 35 cm) annual herb, rare, recorded from W Zimbabwe; flower colour unknownThunbergia annua
4Plant not a small annual herb5
5Leaves lanceolate to narrowly elliptic; widespread distributionThunbergia oblongifolia
5Leaves ovate; confined to E onlyThunbergia natalensis
6Flowers blueThunbergia crispa
6Flowers white, cream, yellow or orange7
7Petioles strongly winged8
7Petioles not or only slightly winged9
8Flowers with a dark "eye"; most common in division E, scarce elsewhereThunbergia alata
8Flowers without a dark "eye"; recorded only from divisions N and WThunbergia reticulata
9Leaves markedly rough to the touchThunbergia dregeana
9Leaves smooth or very slightly rough to the touchThunbergia subalata

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-23

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2023). Flora of Zimbabwe: Thunbergia: Key to species.
https://www.zimbabweflora.co.zw/speciesdata/species-key.php?genus_id=1323, retrieved 31 January 2023

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