Alnus

(al'nus.) (Bot.) A gen. of deciduous trees, 0. Betulaceæ, which delights on the banks of rivers, and whose flowers have no petals. A. Can a dens is, A. glauca,A.lac in i at a(Fig. 20), and A. undulata, belong to N. America. Aloe,(al'o.) [Gr.] (Bot.) A gen. of succulent herbaceous plants, O. Liliaceæ, growing in warm countries. They have fleshy leaves, with ajuice of intense bitterne . Several species, among which the most extensive is A. socotrina, yield the well-known drug so useful as a purgative. Fig. 20. ALNUS LAC IN I AT A. See A GAVE. [s. 22]