. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 894 LAWSONIA ' produ glubrous shnib, with branches spinv or not. Important generic characters are: calyx 4-parted: petals 4: stamens 8: capsule globose, 4-celled, rupturing irregularly. &lba, Lam. Henna Plant. Lvs. opposite,"oval-lanceo- late, entire, short-stalked : fls. panicled. Native to In- dia, t
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 894 LAWSONIA ' produ glubrous shnib, with branches spinv or not. Important generic characters are: calyx 4-parted: petals 4: stamens 8: capsule globose, 4-celled, rupturing irregularly. &lba, Lam. Henna Plant. Lvs. opposite,"oval-lanceo- late, entire, short-stalked : fls. panicled. Native to In- dia, the Orient, N. Afr. Naturalized in West Indies. LAYERING. Figs. 1248-1253. Layering is the pro- cess by which a part of a plant stem in i roots while still attached to and notirWli plant, so that it may be able to n: umIc |,.'inlent growth. The tendency, under ,-ns, to produce roots from the cambium , ,. i |-;irt of the stem is manifested by many ].l:iiii ,. -im . iilh in the tropics. It may be noticed in the spitiis Fi<us culti- vated in the greenhouse, in Epigiea and if 7i us Toxicoden- dron in the woods, in tomato vines in the garden, in grape canes lying on the ground, and frequently in young apple wlun trunk 1., ,< .â¢,,v,]v,l with" earth ith those plants which du not ruul readily Iruiu cuttings. The mode of root-production is essentially the same in either case. The right conditions as to moisture, temperature, food supply, etc., seem to stimulate the formation of one or more growing points in the cambium zone. The multiplying cells force their way through the bark, and if favorable soil contact is secured, supporting roots are soon developed. The same results may come, sometimes more readily, from or near a callus formed in the effort to liial a cut surface. It is wln-n the food sup- ply is ..r tic- cell artinn is s,. slow that the de- tached |,art pcrM, supporting roots could be establislie.
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