Macrocarpaea (Griseb.) Gilg

Shrubs, subshrubs, rarely herbaceous, rarely epiphytic; branches rounded to quadrangular, longitudinally canaliculate, the internodes short to elongated. Leaves cauline, subsessile to petiolate; the petiole often amplexicaul; the lamina obovate, ovate to lanceolate, acute to cuspidate at the apex, usually cuneate at the base, membranous to coriaceous. Inflorescences terminal and axillary, open cymose, paniculate, or rarely racemose, often few-flowered. Flowers 5-merous; calyx campanulate to subtubular, the lobes imbricate or rarely valvate, usually unequal; corolla white, yellow, greenish, or red, salverform, narrow to broadly campanulate, rarely tubular, the lobes usually unequal, usually ovate; stamens adnate at or near the middle of the corolla tube, generally included, the filaments flattened, the anthers versatile, usually ovate, bilobate at the base; pistil often exserted, the ovary fusiform to pyriform, the style filiform, elongate, the stigma bilobate, often deeply so. Capsules ovoid to fusiform, often beaked by the per-sistent style, septicidally 2-valvate; seeds numerous, minute. Pollen grains in monads, radially symmetrical, isopolar, oblate, spheroidal, the amb rounded-triangular, 41-45 x 46-53 microns, 3-colporate to 3-porate, the colpi relatively short with rounded ends, the colpus membrane granulose, the ora lalongate to lolongate, the pores oval to circular, the diameter of apocolpia (apoporia) 35-36 microns;  exine 3-4 microns thick; sexine thicker than nexine, reticulate, heterobrochate, the lumina 0.5-10 l in diameter, usually rounded, the muri 1-3 ,u wide, supported by one or usually more rows of bacules, of a pilum-or clava-like shape with rounded to truncate apices; nexine generally granulose (M. browallioides).