388 78. AMENIIFERJE. 



Tribe II. Myricece. 



3. MIEI'CA Linn. Sweet Gale. 



1. M. Gale (L.) ; 1. lanceolate broader upwards serrate, st. 

 shrubby.^. B. 562. Height 34 feet. Bushy. Catkins 

 sessile erect. Fr. with resinous glands. L. fragrant when 

 bruised. Bogs. Sh. V. Bog Myrtle. E. S. I. 



Tribe III. Betulinece. 



4. BET'ULA Linn. Birch. 



1. B. verrucosa (Ehrh.) ; 1. rhomboid-triangular doubly serrate 

 abruptly acuminate, scales of the fern, catkins o-lobed, lateral lobes 



falcate^eflexed 9 fr.o\MMB,te.-Fl.J}an.264Q. Sy..JB.l2Q5. B. 

 alba Koch. B. odorata R. xii. 626. L. usually glabrous often 

 covered with resinous spots above, always having a manifest ten- 

 dency to a rhomboidal form, flat beneath with raised veins above. 

 Young shoots mostly -with resinous tubercles, often very long 

 and pendulous. Stip. ovate-lanceolate, acute, thrice as long as 

 broad, circinate; sides not deflexed. Buds conical. The catkin- 

 scales and the shape of the 1. distinguish this from the next. 

 Rather common. T. IV. V. White Birch. E. S. I. 



2. B. al'ba (L.) ; l.-rhomboid-ovate or cordate unequally ser- 

 rate acute, scales of the fern, catkins 3-lobed, lateral lubes ascending, 

 fr. broadly obovate. Sy. E. B. 1296. R. xii. 623. B. glutinosa 

 (Fr. ) ed. viii. B. pubescens Koch. L. usually glabrous, always 

 more or less ovate, flat above with raised veins beneath. Stip. 

 ovate, blunt, twice as long as broad ; sides deflexed. Buds ovoid. 

 j^sot so elegant a tree as the preceding and often little more than 

 a bush. Twigs sometimes pendulous. /3. B. pubescens (Erhr.) ; 

 1. peduncles and young twigs downy. [\ T ar. parvifolia (Regel) is a 

 northern form with smaller often cuneate-based I. and erect catkins.] 

 Common. T. IV. V. Common Birch. E. S. I. 



3. B. intermedia (Thorn.) ; 1. broadly-rhomboidal acute dentate, 

 catkins erect with 3-lobed scales, the lateral lobes rounded 

 porrect broader than interm. lobe, fr. with margin equalling its 

 breadth. .K. xii. 624. A small tree, 615 ft. high. L. small. 

 Catkins stalked. Glen Callater. S. 



4. B. ndna (L.) : /. roundish crenate glabrous blunt, scales of 

 the fern, catkin digit at e-trifid, lobes equal, fr. orbicular with a 



