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418 THE NURSERY-MANUALSchomburgkia. Orrhidacec.Propagated by parting or dividing the stems. See Orchids,page 372.Sciadopitys (Umbrella Pine). P&nceoe.Propagated by seeds and layers. Cuttings of the half-ripenedshoots, taken in summer and inserted in sand, in heat, root readily.Seeds, if obtainable, give best results.Scilla (Squill). Lil,iacea?.Slowly increased by seeds, but usually by bulbels or offsets,taken after the foliage has matured. See Liliactxe, page 349.Scirpus. Cypcracrce.Increased by seeds, suckers and divisions.Scolymus (Spanish Salsify). Con2posiflP.Raised from seed sown in spring where plants are to stand.Scorzonera (Black Salsify). Co~mpositoe.Grown from seeds, sown where the plants are to stand.Scutellaria (Skullcap) S Labiatce.The herbaceous species are increased by seeds and division,and the shrubbx kinds by cuttings of half-ripened shoots in spring.Seaforthia elegans : ,4 rchontophm i.r.Sea-Kale (Cramho nlarifima). Crm+mP.Raised from ;;eetls (globular pods) sown without being shelled,usually in a seed-bed. When the young plants have made three orfour leaves, they should be removed to permanent quarters. Seedlingsshould furnish crops in three years. Increased also by rootcuttings,4 or 5 inches long, taken from well-established plants.These should give plants strong enough for cutting in two years.Sechium (Chayotc). Cucur?&xfw.The entire fruit is planted in early spring ; it contains one largeseed.Sedum (Orpine. Stonecrop). Crassdacece.Handled by seeds, by division of the tufts, by cuttings of stemsor leaves in spring. Pieces of the plant usually grow readily, ascuttings. Some of the kinds produce nffse-ts.Selaginella. Sdaginellacea3.Propagated by spores, as for ferns (which see) and by shortcuttings, inserted in early spring, in riots or pans. The cuttings of