BIECH FAMILY. 467 



Type locality : " Native of North America." 

 Herb. Geol. Siirv. Herb. Molir. 



Corylus americana Walt. Fl. Car. 236. 1788. 



Ell. Sk. 2 : 611. Gray, Man. cd. 6, 474. Chap. Fl. 425. 



AUeghenian and Carolinian areas. Ontario to Assiuiboia; New England west to 

 Minnesota, Dakota, Nebraska, and Arkansas, south to New .Jersey, upper district of 

 Carolina and Georgia. 



Alabama: Tennessee Valley. Coosa Valley, dry woods. Claiborne County, 

 (E. A. Smith). Lauderdale County, river hills. Flowers in March; fruit ripe 

 September, October. Not frequent. 



Economic uses: The nuts are edible. 



Type locality : South Carolina. 



Herb. Geol. Surv. Herb. Mohr. 



BETULA L. Sp. PL 2 : 982. 1753. Bikch. 



Aboxit 30 8i>ecies, boreal and temperate zones of Northern Hemisphere, Europe and 

 Asia. North America, 11. Deciduous trees. 



Betula lenta L. Sp. PI. 2 : 983. 1753. Cherry Birch. Mountain Mahogany. 



Betitla ejceha Ait. Hort. Kew. 3 : 337. 1789. 



Ell. Sk. 2 : 617. Gray, Man. ed. 6:471. Chap. Fl. 428. Sargent, Silv. N. A. 9: 50, 

 t. 447. 



Canadian zone, AUeghenian and Carolinian areas, Newfoundland, Ontario; New 

 England to northern Delaware, south along the mountains 3,000 to 5,000 feet to 

 Georgia. 



Alabama : Mountain region. Kocky ridges of greatest elevation. Clay County, 

 Chehawhaw Range, 2,400 feet; shrubby, scarcely over 4 feet high. Winston 

 County, rooky banks Sipsey fork, 1,600 feet; tree of medium size. Very riire. 



Economic uses: On its extreme southern limit of no importance, being of stunted 

 growth. 



Type locality : " Hab. in Virginia, Canada." 



Herb. Geol. Surv. Herb. Mohr. 



Betula nigra L. Sp. PI. 2 : 982. 1753. Black Birch. 



Bctida rubra Michx. f. Hist. Arl). Am. 2 : 142. 1812. 



Ell. Sk. 2: 616. Gray, Man. ed. 6, 472. Chap. Fl. 428. Coulter, Contr. Nat. Herb. 

 2 : 413. Sargent, Silv. N. A. 9 : 61, t. 452. 



AUeghenian to Louisianian area. New England, west to Minnesota, Nebraska, 

 aud eas'^ern Kansas, south to New .Jersey, Florida, and the Gulf States, west to 

 Texas and Arkansas. 



Alabama: Over the State. Of largest dimensions and most fre(iuent on river 

 banks (if Ihe Lower hills, as for exiiniple, on the Mulberry Fork of the Warrior 

 River in lilount C'onnty, and Marriotts Creek in Cullman County. 



Economic uses: Timber tree of lesser value. 



Type locality : " Hab. in Virginia, C;inada." 



Herb. Geol. Surv. Herb. Mohr. 



ALNUS Gaertn. Fruct. 2 : .54, t. 90. 1791. Alder. 



Fourteen 8i>ecies, cooler and temperate regions. Europe, Asia, South America, 

 South Africa. Extratropical South America. North America, 8 species. Deciduous 

 trees. 



Aliius rugosa (Du Roi) Koch, Dendrol. 2 : 635. 1872. 



Iktida ahum rugosa Du Roi. Harbk. 1 : 112. 1771. 



Ahuis acrridaia Willd. Sp. PI. 4 : 336. 1805. 



Ell. Sk. 2 : 567. Gray, Man. ed. 6, 473. Chap. Fl. 429. Coulter, Contr. Nat. Herb. 

 2:413. 



AUeghenian to Louisianian area. New England west to Michigan, south to Flor- 

 ida and the Gulf States, west to eastern Texas and Arkansas. 



Alabama: Throughout the State. Low banks of streams, common. Flowers in 

 February. 



Economic uses: The bark, known as "alder bark," is nsed as a dyestutf, aud in 

 domestic medicine. 



Type locality oi A. mrrnlata: " Hab. a I'ensylvania ad Carolinam." 



Herb. Geol. Surv. Herb. Mohr. 



