Dislocations in web silicon have been observed by x‐ray diffraction microscopy. Numerous sources of dislocations originate in the dendrite and form low‐angle grain boundaries within the web. Dislocations propagating along the growth direction have [01¯1] and [101] or [110] Burgers vectors, and dislocations aligned along the [11¯0] and [101¯] directions are product dislocations of a Lomer‐Cottrell reaction. Interactions between the two sets of dislocations are often observed.