Linn. (D.cultraius,Thunb. D. purpureus, Lindl). Hyacinth Bean.Tall-twining (often reaching 10-20 ft.): leaflets broad-ovate, rounded below and cuspidate-pointed at the apex, often crinkly:  fls. purple, rather large, 2-4 at the nodes, in a long, erect raceme: pods small (2-3 in. long) and flat, usually smooth. conspicuously tipped with the persistent style; seed black, small. Tropics. B. M. 896. B. R. 10:830. A.G. 14:84. - Cult. in this country as an ornamental climbing bean, but in the tropics the seeds are eaten. Annual. It is easily grown in any good garden soil. Like common beans, it will not endure frost. It is very variable. A form with white fls. and seeds is D. albus, Hort. A form of very large growth, also white-fld. , is D. gigantéus, Hort. (Fig. 731). A perennial form (perhaps a distinct species) is D. lignosus, Linn., the Australian Pea. B.M. 380.