506 



ON SEEDLINGS 



about 5'2o mm. long ; cotyledons linear, suddenly pointed, subacute, 

 a little longer and slightly broader than the radicle ; radicle cylin- 

 drical, obtuse, at the opposite end of the seed from the hilum. 



Seedling (fig. 653). 



Hypocotyl erect, terete, slender, pale green, glabrous, about 

 1-1 cm. above the soil. 



Cotyledons narrowly spathulate, obtuse, entire, tapered to the 

 base, glabrous, opaque-green, distinctly one-nerved, 8*5 mm, long, 

 2-5 mm. at the widest. 



Stem woody, erect, terete, glabrous or 

 slightly glandular below the leaves ; 1st inter- 

 node about '5 mm. long ; 2nd and 3rd each 

 about 1 mm. 



Leaves simple, cauline, alternate, stipulate, 

 petiolate, glandular-pubescent at the margins 

 and midrib (in young specimens) ; petioles 

 channelled above ; stipules small in the seed- 

 ling, surrounding the base of the petiole, to 

 which they are adnate, but in the adult stage 

 of the tree they are of considerable size, cup- 

 like and deciduous. 

 Xo. 1. Reduced to a short petiole, and glandular-pubescent. 

 No. 2. Spathulate-cuneate, bluntly tridentate at the upper end, 

 alternately penninerved, with the nerves ascending and the larger 

 ones running directly into the teeth. 

 No. 3. Similar but larger. 



In Platanus occidentalis, L., the cotyledons are narrow, lance- 

 olate with a prominent midrib, 1*2 cm. long, 2 mm, wide, acute, 

 sessile, and shining green above. 1 



The first leaves are alternate, entire, elongated-oval, serrate 

 with shortly pointed teeth, with midrib and lateral nerves. 



FIG. 653. 



Platanus orient alit. 

 Nat. size. 



JUGLAXDE.E. 



Benth. et Hook. Gen. PL iii. 397. 



Fruit and Seed. The ovary is inferior and one-celled 

 with a solitary, basal, erect, orthotropous ovule. The fruit 

 is drupaceous or rarely nut-like and dry, sometimes \vith the 

 1 Vide Tubeuf, 1. c., p. 116, fig. 153. 



