Commelina, Linnaeus, 1753
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publication ID |
https://doi.org/ 10.11646/phytotaxa.303.2.1 |
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persistent identifier |
https://treatment.plazi.org/id/03CA87B2-FFE8-F50E-CBEC-85CA93E10E7C |
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treatment provided by |
Felipe |
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scientific name |
Commelina |
| status |
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Key to the species of Commelina View in CoL in Brazil, Guyana, Paraguay, Suriname and Uruguay
Notes: species’ distributions in these four countries are presented inside brackets. Non-native species in the area are marked with an asterisk. Abbreviations: BR: Brazil; GY: Guyana; PY: Paraguay; SR: Suriname; UY: Uruguay.
1. Plants with reddish trichomes on the leaf sheath or at the base of the leaf lamina (sometimes not very conspicuous) .................. 2
– Plants without reddish trichomes ...................................................................................................................................................... 4
2. Leaves ovate. Leaf lamina symmetric or only very slightly asymmetric at the base. Presence of subterraneous cleistogamic flowers [BR, GY, PY, SR, UY] ....................................................................................................................................... * C. benghalensis View in CoL L.
– Leaves elliptic to lanceolate. Leaf lamina conspicuously asymmetric at the base. Absence of subterraneous flowers ................... 3
3. Spathes with margins free to the base. Fruit whitish, indehiscent [BR, GY, PY, SR] ............................................. C. rufipes Seub. View in CoL
– Spathes with margins fused basally. Fruit brownish, dehiscent [BR, GY, PY, SR, UY] .......................................... C. obliqua Vahl View in CoL
4. Spathes with margins free to the base .............................................................................................................................................. 5
– Spathes with margins fused basally .................................................................................................................................................. 7
5. Base of the leaf lamina cordate. Spathes completely glabrous. Flowers white, rarely bluish [BR, GY, PY, UY] .............................. ........................................................................................................................................................ C. platyphylla Klotzsch ex Seub. View in CoL
– Base of the leaf lamina never cordate. Spathes ciliate, rarely glabrous. Flowers blue to purple ..................................................... 6
6. Leaves ovate to elliptic. Staminodes 2, yellow [BR, GY, PY, SR, UY] ............................................................... C. diffusa Burm.f. View in CoL
– Leaves linear-lanceolate. Staminodes 3, white and blue [BR, GY, PY] .............................. C. schomburgkiana Klotzsch ex Seub. View in CoL
7. Petals yellowish. Lateral stamens yellow [BR] ............................................................................. C. catharinensis Hassemer et al. View in CoL
– Petals blue to purple, rarely white. Lateral stamens whitish to purple ............................................................................................. 8
8. Leaf sheath and both faces of blade densely covered with trichomes [BR, PY] ................................................................................. ..................................................................................................................... C. villosa (C.B.Clarke) C.B.Clarke ex Chodat & Hassl. View in CoL
– Leaf sheath and blade glabrous to moderately pilose [BR, GY, PY, SR, UY] ................................................................ C. erecta View in CoL L.
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