Final answer:
The material of the scarf Alexis put on Patrick cannot be determined from the provided text, as the relevant details are not given.
Step-by-step explanation:
The question asks about the material of a scarf featured in a literary work. Although the text provided discusses a black scarf used to wrap a heavy bundle, it does not specify the material it is made from. However, examining the context of La Parisienne, there is mention of an elaborately woven dress but not of a scarf. The dress involves intricate weaving, which suggests that textile production and materials could be important in this context, but this does not provide a definitive answer about the scarf's material. Therefore, based on the information provided, it is impossible to determine the material of the scarf Alexis put on Patrick without further details from the source text.