Sentence:  The flowers [of the "Hoya carnosa"] are produced in umbels on short stems sometimes as many as a dozen on a stem; in the centre of each flower there is, as it were, a drop of thick liquid distilled, which if tasted has the luscious flavor of honey; hence the plant in England and Scotland goes under the name of <WSD>Honey Plant</WSD>; but quite the reverse in this country, where it is called Wax Plant. 
Meaning of the word marked with <WSD> tags:  A plant of the genus "Hoya", especially the (porcelainflower) or waxplant ("Hoya carnosa") from the tendency for excess nectar to drip from its flowers.