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- W1976297312 abstract "The tropical African genera Rutidea and Nichallea possess secondary pollen presentation, as do many other Rubiaceae, but the style‐stigma complex shows some special features. Style and stigma form one slender structure that terminates in a fusiform to clavate or broadly elliptic to globose head. The stigma consists of two permanently fused stigmatic lobes, a common enough situation within the Rubiaceae, but it is further differentiated into three zones: a narrow stigmatic base, a stigmatic head, and the free tips of the stigmatic lobes. The pollen‐receptive surfaces are highly modified. They are restricted to the adaxial sides of the free stigmatic tips and to the lines of fusion between the stigmatic lobes, visible as two longitudinal furrows on the style‐stigma complex. Compared to the structure of the style‐stigma complex in other genera of the Rubiaceae with permanently fused stigmatic lobes, a major morphological trend can be observed in Rutidea and Nichallea, notably the displacement of the pollen‐receptive surfaces to the lower regions of the stigma, resulting in spatial separation of the pollen‐receptive and pollen‐presenting surfaces of the style‐stigma complex." @default.
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- W1976297312 date "2001-05-01" @default.
- W1976297312 modified "2023-09-24" @default.
- W1976297312 title "Stigma of the African Genera <i>Rutidea</i> and <i>Nichallea</i> (Rubiaceae‐Ixoroideae‐Pavetteae): Highly Modified Receptive Surfaces" @default.
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- W1976297312 doi "https://doi.org/10.1086/320139" @default.
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