522 ON SEEDLINGS 



segments ; slender nerves run from the base of the lamina near the 

 outer edge more than half way towards the apex; petiole short, 

 deeply grooved above, convex 011 the back, glabrous, about 2-25 mm. 

 long ; lamina 1-5-1-8 cm. long, 2'3-2'5 cm. wide between the tips 

 of the outer segments. 



Stem erect, terete, glabrous or thinly pubescent, green, ulti- 

 mately woody ; 1st internode 2'25 mm. long. 



Leaves compound, cauline, alternate, exstipulate, petiolate, im- 

 paripinnate, penninerved ; leaflets serrate, numerous. 



No. 1. Oblong or lanceolate, obtuse or acute, rather distantly 

 serrate, simple, sessile or subsessile, glabrous or nearly so, alternately 

 penninerved, with a nerve running into each serrature. 



Nos. 2-5. With more elongated petioles, lanceolate, acuminate, 

 larger, but otherwise similar to the first. 



MYRICACE.E. 



Benth. et Hook. Gen. PL iii. 400. 



Fruit and Seed. The ovary is one-celled with a solitary, 

 basal, erect, orthotropous ovule. The fruit is small, globose 

 or ovoid, with a fleshy or succulent exocarp and a bony endo- 

 carp. The seed is erect and exalbuminous with a membranous 

 testa. The embryo is straight, with fleshy plano-convex coty- 

 ledons and a short superior radicle, the whole conforming in 

 shape to that of the seed. 



Seedling. Myrica californica (fig. 663) may serve as a 

 type of the Order. The cotyledons are spathulate-obovate, 

 tapered to the base, with several slender, ascending nerves on 

 each side of the midrib, best seen when fading. The first leaf 

 is small and cuneate, followed by three which are cuneate or 

 rhomboid, trifid and serrate. The fifth and sixth are narrowly 

 ovate ; and the seventh to the tenth inclusive are oblong and 

 acute. The primary leaves as well as the cotyledons bear a 

 strong resemblance to those of Crataegus Oxyacantha, but they 

 are covered with oily or resinous glands. The roots are 

 plentifully supplied with small tuberous processes. 



