Broad-Leaved Maple 



641 



finely toothed all around, hairy when very yoiing 

 but at maturity smooth ab(Jve, paler and nearly 

 smooth beneath, the short lobes long-pointed. 

 The flowers are borne in long nodding stalked ra- 

 cemes at the ends of the branches, the sterile and 

 fertile ones usually ia different clusters but on the 

 same plant; the narrow yellow-green sepals are 

 about as long as the obovate or spatulate bright 

 yellow bluntish petals; the stamens of the sterile 

 flowers are nearly as long as the petals, those of 

 the fertile flowers very short. The widely diver- 

 gent samaras are smooth, 2 to 2.5 cm. long, the 

 wing 8 to 10 mm. wide. 



The tree is of great beauty and adapted to 

 lawn and park planting in shaded situations; its 

 wood is light brown, with a specific gravity of 

 0.52. It is also called Striped dogwood. Whistle 

 wood and Pigeon wood. 



Fig. 589. — Striped Maple. 



3. BROAD-LEAVED MAPLE — Acer macrophyUum Pursh 



A forest tree of the Pacific coast, attaining a height of at least 32 meters and 

 a trunk diameter of about i meter, and ranging from southern Alaska to southern 



California, and known also as White 

 maple. 



The furrowed brown bark is scaly 

 and rather thick. The twigs are quite 

 smooth, at first light green, red in the 

 winter and subsequently gray. When 

 unfolding, the leaves are densely hairy, 

 but soon become smooth above, and 

 at maturity have only a few hairs in 

 tufts at the axils of the veins beneath; 

 they are nearly orbicular in outline, 

 or somewhat wider than long, the 

 petiole often as long as the blade, the 

 latter deeply 5-lobed, or sometimes 3- 

 lobed, cordate at the base, rather 

 leathery and 2 to 3 dm. across when 

 fully grown, dark green and somewhat 

 Fig. 590. - Broad-Leaved Maple. gaining above; paler and with the veins 



very prominent beneath, the pointed lobes wavy-margined, coarsely toothed, or 

 again lobed. The flowers are in long, drooping racemes at the ends of the 



