[719] Heer, Ueber d. Flachs, p. 25.
[720] Sordelli, Notizie sull. Staz. di Lagozza, 1880.
[721] Vol. xvi. sect. 1, p. 30.
[722] De Bunge, Bull. Soc. Bot. de Fr., 1860, p. 30.
[723] Ledebour, Flora Rossica, iii. p. 634.
[724] Bunge found hemp in the north of China, but among rubbish (Enum. No. 338).
[725] Seringe, Description et Culture des Mûriers.
[726] Bureau, in De Candolle, Prodromus, xvii. p. 238.
[727] Brandis, Forest Flora of North-West and Central India, 1874, p. 408. This variety has black fruit, like that of Morus nigra.
[728] Bureau, ibid., from the specimens of several travellers.