34 MoRACEAE. 
Morus. Mulberry. 
(Family Moraceae). 
Trees with rather scanty milky 
sap: deciduous. Twigs moderate 
or rather slender, rounded: pith 
moderate, round, continuous. Buds 
sessile, solitary or collaterally 
multiplied, ovoid, oblique, with 3 
or mostly a half-dozen 2-ranked 
thin scales, the end-bud lacking. 
Leaf-scars alternate, round or half- 
round or _ obtusely' triangular, 
somewhat raised: bundle-traces 
numerous and scattered or in an 
ellipse or more or less definitely 
aggregated into 3: stipule-scars 
narrow, the one below the bud 
larger. 
Mulberry twigs are frequently 
mistaken for those of linden when 
carelessly observed. Apart from 
their browner color they differ in 
their milky sap and in their more 
numerous dry and thin bud-scales. 
1. Buds triangular-ovoid, short and closely appressed. 2. 
Buds more elongated (6-8 mm.) and somewhat spreading. 4. 
2. Bud-scales uniformly colored. (White m.) (1).. M. alba. 
Bud-seales brown-margined. 3. 
3. Not weeping. (Tartarian m.). (2). M. alba tatarica. 
Weeping, usually grafted as a standard. M. alba pendula. 
4. Bud-seales white-margined. M. acidosa. 
Bud-seales dark-margined. 5. 
5. Twigs often downy above. (Red mulberry). (3). M. rubra. 
Twigs glabrous. (Black mulberry). M. nigra. 
