Sentence:  There existed only one specimen of this sacred tree in all Mexico, at least to the knowledge of the Mexicans; ... In spite, however, of the firmest convictions of the indivisibility of this tree — the Manitas, as it is commonly called — it has been propagated by cuttings, some of which are at this moment thriving in some of the larger <WSD>stoves</WSD> of our modern collectors. 
Meaning of the word marked with <WSD> tags:  A hothouse (heated greenhouse).