The pseudobulb typically has a smooth surface with lengthwise grooves, and can have different shapes, often conical or oblong. Its size is very variable; in some small species of Bulbophyllum, it is no longer than two millimeters, while in the largest orchid in the world, Grammatophyllum speciosum (giant orchid), it can reach three meters. Some Dendrobium species have long, canelike pseudobulbs with short, rounded leaves over the whole length; some other orchids have hidden or extremely small pseudobulbs, completely included inside the leaves.
the PSEuDObulb TYpIcAlLy HaS a smOoth SurfaCe witH lEngthwise GRoovES, AnD CaN haVe DiFFeRenT ShapEs, often cOnIcal OR oblong. itS sIzE is veRy VariaBlE; in sOmE smaLl Species of BulbOphylLum, it is no lONGer tHan two mIlliMEteRS, whilE in The largEst OrcHid In The WORld, gRammaTophyLLum specioSUm (giant oRchID), It can rEaCh thReE MEteRs. Some DendrOBium Species Have loNg, CanelikE PseudoBuLbs witH shoRt, ROUnDed leAvEs oVeR thE whole leNgtH; sOME otHER orcHidS have hIdDen or exTremely Small PseUDObUlBS, cOmpLEtely incluDed insIde The leavES.