Parr 3, 1908] PLATANACEAE 229 
6. Platanus occidentalis L. Sp. Pl. 999. 1753. 
Platanus lobata Moench, Meth. 358. 1794. 
Platanus hybridus Brot. Fl. Lusit. 2: 487. 1804. 
Platanus vulgaris angulosa Spach, Ann, Sci. Nat. II. 15: 293. 1841. 
Platanus occidentalis hispanica Wesmael, Mém. Soc. Sci. Hainaut III. 1: 12.f.5. 1867. 
Platanus occidentalis lobata Bommer, Les Platanes 17. 7. 5,6. 1869. 
A tall tree, reaching 50 m. in height; bark thin, smooth, exfoliating in thin plates, or 
rough on the old trunks; twigs glabrous; young foliage covered with a white deciduous 
tomentum, becoming glabrous or nearly so at maturity; leaves 15-25 cm. long and wide, 
broadly deltoid, truncate at the base, 3-5-nerved, 3-lobed or with faint additional lateral 
lobes, with broad or obscure sinuses, sharply serrate with coarse acuminate teeth; lobes 
shallow, abruptly acuminate, the middle one much broader than long; petioles pubescent ; 
stipules foliaceous, sharply serrate or lobed; fruiting peduncles 8-15 cm. long; mature 
heads 2.5-3 cm. in diameter; achene 7-8 mm. long, about equaled by the subtending hairs, 
glabrous or nearly so at the tip, truncate and tipped with a persistent style, about 1 mm. 
long. 
TYPE LOCALITY: North America. i 
DISTRIBUTION : New Hampshire to Ontario and Nebraska, south to Florida and Texas. 
ILLUSTRATIONS: Catesby, Nat. Hist. Car. #1. 56; Wangenh. Nordam. Holz. p/. 13, f, 31; Du- 
ham. Arb. & Arbust. 2: 1.2, Abbot, Insectsof Georgia fl. 55 ; Michx. f. Hist. Arb. Am. 3: Al. 3 ; 
Michx. f. N. Am. Sylva fl. 63; Wats. Dendr. 2: f/. 100; Audubon, Birds p/. 206 ; Sargent, Silva 
N. Am. pl. 326, 327 ; Sargent, Man. f. 271; Dippel, Handb. Laubh. 3: /. 252 ; J. E. Rogers, Tree 
Book opp. 279; Britt. & Brown, Ill. Fl. f. 7881; Newhall, Trees NE. Am. f 26; Koehne, Deuts. 
Dendr. /. 40, A; Britton, N. Am. Trees /. 364, 365. 
