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9. Merremia Dennstedt, Schluss. Hort. Malab. 34. 1818. emend. Hall.f., Bot. Jahrb. Syst. 16:581.1893, Baker & Rendle in This.-Dyer, Fl. Trop. Afr. 4(2):101.1905, Prain in J. As. Soc. Bengal 74:302.1906, van Ooststroom in van Steenis, Fl. Males. ser. 1,4:439.1953, Verdcourt in Hubbard & Milne-Redhead, Fl. Trop. E. Afr. 48.1963, Austin in Ann. Missouri Bot. Gard. 62:179.1975.


Florida Atlantic University, Boca Raton, Florida, USA

Merremia aegyptia

Credit: S. Hameed

  • Skinneria Choisy
  • Spiranthera Bojer

    Climbers, usually herbaceous, sometimes woody. Leaves entire, lobed or palmately compound with 3-7 leaflets, glabrous or pubescent. Flowers solitary and axillary, in few-flowered dichasia or sub-umbellate. Sepals sub-equal, oblong to elliptic. Corolla campanulate, white or yellow, some with purple centers. Anthers spirally twisted with complete dehiscence, the pollen 3-colpate or rarely pantocolpate. Stigmas globose or bi-globose. Fruit capsular, longitudinally dehiscent by 4-6 valves or irregularly. Seeds glabrous or pubescent.

    Several authors (e.g. Clarke in Hook f., l.c. 196, R.R. Stewart l.c. 574) have included the species of this genus within Ipomoea. There is good basis for keeping these separate (Austin, l.c. 158.) Records indicate 4 species in Pakistan.

    1 Leaves palmately 5-7-lobed to palmately compound. Corolla 1.5-5 cm long   (2)
    + Leaves entire, crenate or at most 3-lobed. Corolla 6-12 mm long   3 Merremia hederacea
    2 (1) Leaves palmately compound, with 5 entire leaflets   1 Merremia aegyptia
    + Leaves palmately 5-7-lobed or sometimes nearly divided to the base, but not palmately compound   (3)
    3 (2) Leaf segments coarsely dentate to crenate to sub-entire. Peduncles hirsute. Sepals 18-25 mm long. Corolla 3-4.5 cm long, white with a red or purple center   2 Merremia dissecta
    + Leaf segments mostly entire. Peduncles glabrous. Sepals 7-8 mm long. Corolla 1.5-3 cm long, cream or yellow   4 Merremia palmata

    Lower Taxa

    Related Synonym(s):


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