Species

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Total: 244

species valid

Philadelphus palaeophilus Cockerell Bull. Amer. Mus. Nat. Hist., 24(Article 4): 92. 7 Feb 1908

species valid

Phragmites laramianus Cockerell Torreya, 9(7): 141. 1 Jul 1909

species valid

Pinus sturgisii Cockerell Amer. J. Sci., Series 4, 26(156): 538. Dec 1908

species valid

Pinus wheeleri Cockerell Bull. Amer. Mus. Nat. Hist., 24(Article 4): 78. 7 Feb 1908

species valid

Planera lingualis Knowlt., Cockerell in Knowlt. Bull. U.S. Geol. Surv., 1919, (696): 464. 13 Feb 1920

species valid

Planera myricifolia (Lesq.) Cockerell Bull. Amer. Mus. Nat. Hist., 24(Article 4): 87. 7 Feb 1908

species valid

Populus crassa (Lesq.) Cockerell Bull. Amer. Mus. Nat. Hist., 24(Article 4): 83. 7 Feb 1908

species valid

Populus cyclomorpha Knowlt., Cockerell in Knowlt. Bull. U.S. Geol. Surv., 1919, (696): 487. 13 Feb 1920

species valid

Populus dakotana Cockerell Bull. Torrey Bot. Club, 33(5): 312. 13 Jun 1906

species valid

Populus daturifolia (Ward) Cockerell Bull. Amer. Mus. Nat. Hist., 24(Article 4): 83. 7 Feb 1908

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