606 



MEDICAL BOTANY. 



2. A. picea, Lindley. — Leaves numerous, linear, acute or emarginate, spreading, glau- 

 cous beneath. Strobiles long, cylindrical. Bracts much narrower than the scales of the 

 strobiles, with a long, subulate point. 



Lindley, Pen. Cyclop, i. 29, Fl. Med. 554 ; A. pectinata, De Candolle, 

 Fl. Fr. ii. 275 ; Finns picea, Linn., Sp. Fl. 1420 ; Lambert, Fin. t. 30; 

 Ficea pectinata, Loudon, Arboret. 2339. 



Common Names. — Silver Pine ; Silver Fir. 



A native of the mountains of the middle and south of Europe. It affords 

 the " Strasburgh turpentine." 



3. A. canadensis, Michaux. — Leaves solitary, flat, serrulated, somewhat distichous. 

 Strobiles ovate, terminal, scarcely longer than the leaf. 



Michaux, N. A. Syl. iii. 185;- Finns canadensis, Willdenow, Sp. Fl. iv. 

 505 ; Barton, Flor. Phil. Prod. ii. ; Lambert, Pin. t. 45 ; Lindley, Pen. 

 Cyclop, i. 30. > 



Common Name. — Hemlock Spruce. 



Fig. 269. 



Abundant in the Northern, 

 and in elevated situations in the 

 Middle States. It is a very 

 large tree, and affords the 

 " Hemlock gum or pitch." 

 The bark is astringent, and 

 used in tanning. 



4. A. excelsa, De Candolle. — 

 Leaves scattered, somewhat 4-cor- 

 nered, mucronate. Strobiles cylin- 

 drical, pendulous, with blunt, undu- 

 lated, slightly-toothed scales. 



De Candolle, Fl. Franc. 

 iii. 375 ; Lindley, Pen. Cy- 

 clop, i. 31 ; Pinus abies, Linn., 

 Sp. PI. 1421 ; Willdenow, Sp. 

 PI. iv. 506 ; Stephenson and 

 Churchill, ii. 75. 



Common Names. — Norway 

 Pine ; Norway Spruce Fir. 



One of the largest of the 

 European trees ; it is found in 

 various parts of Europe and 

 northern Asia. It yields some 

 of the " Burgundy Pitch" of the 

 shops. This product is also 

 obtained from A. picea. 



A. excelsft. 



5. A. nigra, Michaux. — Leaves 

 spreading equally round the branch, short, quadrangular. Strobiles ovate-oblong, obtuse, 

 with ragged, rounded scales. 



Michaux, Arb. Forest, i. t. 11 ; Lindley, Pen. Cyclop, i. 32 ; Pinus nigra 

 and rubra, Lambert, Pin. t. 37,38 ; P. denticulata, Michaux, Fl. Bor. Am. 

 Cmnmon Names. — Black Spruce ; Double Spruce. 



A large tree, found in the most northern parts of this continent, and extend- 



