Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 77. Mulberry, Morus alba, p. 224 (Wo). Venation pseudo-palmate as in Populus alba, but thetertiaries run irregularly into an open network. Second-aries straight, or nearly so, not sinuate. Reticulation veryloose and not prominent. In Morus nigra, the Black Mulberry, the leaves also w. ii. 15 226 BLACK MULBERRY vary much in size (9—15 x 7—15 cm.) and shape, but arelarger and rougher than in M. alba; petiole about 1—2cm. long, usually more cordate at the base, ovate-acute orheart-shaped (resembling the Lime), or rarel
Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 77. Mulberry, Morus alba, p. 224 (Wo). Venation pseudo-palmate as in Populus alba, but thetertiaries run irregularly into an open network. Second-aries straight, or nearly so, not sinuate. Reticulation veryloose and not prominent. In Morus nigra, the Black Mulberry, the leaves also w. ii. 15 226 BLACK MULBERRY vary much in size (9—15 x 7—15 cm.) and shape, but arelarger and rougher than in M. alba; petiole about 1—2cm. long, usually more cordate at the base, ovate-acute orheart-shaped (resembling the Lime), or rarely cut to themiddle into 3—5 lobes, which are often again cut, or. Fig. 78. Mulberry, Morus alba, p. 224 (Ett). obtuse and coarsely and unequally serrate. Upper surfaceharsh, scabrous pubescent; lower with short soft hairs, orboth surfaces velvety. Stipulate. Petiole milky, pubes-cent, about i the length of the midrib, hardly leaves hairy beneath. Venation as in M. alba. HAWTHORN : VINE 227 ** Leaves devoid of latex, and glabrous ornearly so. t Leaves small, about 3—6 cm. in diameter,cuneate; lobes crenate, irregular. Shootsthorny. Crataegus Oxycantha. In the case of deeply-lobedleaves the venation is pseudo-palmate, and the leaf appearspalmate, owing to the divergence of the long basalsecondaries from the point of attachment of the petioleinto the larger lobes (see p. 210). tt Leaves large, up to 10—20 cm. in diameter,broad pentagonal or rounded, 3—5-lobed ;shoots not spiny or thorny. 0 Many leaves with opposed tendrils; petiolesolid at the base and the buds exposed; notbearing stellate hairs, but containing needle-like raphides.
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