POPTJLUS. BBItTLA. 333 



cordate palmately 5-lobed, stiq. 2 linear hifid crosslihe (yellow). 

 — E. B. 1618. — With suckers. L. generally loted. Male cat- 

 Idn-soales hairy. — Damp woods. T. III. IV. Wliite Poplar. 

 Abele. E. S. 



2. P. canes' cens (Sm.) ; l.-buds downy not viscous, 1. roundish 

 obscurely lobed sparingly cottony and grey beneath, 1. of young 

 shoots cordate-OTate undivided, stig. 2 wedgeshaped 3 — i-lohed 

 (purple). — E. B. 1619. — With suckers. L. not lobed, except 

 occasionally the youngest. Male catkin-scales hairy. — Damp 

 woods. T. III. I V . Gray Poplar. E. 



3. P. trem'ula(lj.); l.-buds glabrous slightly viscous, 1. nearly 

 round acute serrate ^Z^Sj-oms onboth sj(fes,youngl. slightly downy, 

 stig. 2 bifid erect. — E. B. 1909. — A small tree, with suckers. 

 Petioles laterally compressed. Male catkin-scales hairy, pal- 

 mately cut. — Woods. T. IV. Aspen. E. S. I. 



4. P. nigra (L.) ; l.-buds glabrous viscous,!, triangular-rhom- 

 boidal acuminate aevi'&te glabroiis on both sides, catkins lax cylin- 

 drical, stig. 2 roundish 2-lobed. — E. B. 1910. — A large tree, 

 without suckers. ■ Petioles laterally compressed. Young shoots 

 glabrous. Male catkin-scales glabrous. — Damp places and river- 

 banks. T. III. Black Poplar. E. 



Tribe II. Myricece. 

 3. Mtri'ca Linn. Sweet Gale. 



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

 shrubby.—^. B. 562.— Height 3—4 feet. Bushy. Oatkina 

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

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



Tribe III. Betulineee. 

 4. Bei'ula Li7in. Birch. 



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

 abruptly acuminate, scales of the fem. catkins 3-lobed, laterallobes 

 falcate're^exed,tr.6hoyate.—Fl. Dan. 2549. Sy.E.B. 1295. B. 

 alba Koch. B.'odorata K. xii. 626. — L. usually glabrous often 

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

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

 Yoimo- 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- 



