POPCLUS. 
307 
glauca, 26. 
hastata, 26. 
Helix, 8. 
herbacea, 31. 
hirta. 17. 
Hoffmanniana, G. 
holosrricea, 12. 
incubacea, 2.3. 
intricata, 10. 
Lambertiana, 8. 
lanata, 27. 
lanceolata. 5. 
Lapponum, 26. 
lam-ina, 18. 
laxiflora, 19. 
mall folia, 27. 
Meyeriana, 2. 
JIvrsinites, 28. 
nigricans, 17. 
nitens, 19. 
oleifolia, 14. 
parvifoUa, 23. 
pentandra. 1. 
petiolaris, 6. 
petra'a, 17. 
pliilI\Teifolia, 19. 
phylicifolia, 19. 
procumbens, 29. 
propinqua, 18. 
prostrata, 23. 
pnmifolia, 25. 
purpurea, 8. 
radicans, 19. 
ramulosa, 8. 
repens, 23. 
reticulata, 30. 
retusa. 30. 
rosmarinifolia, 20. 
rubra, 9. 
rugosa, 12. 
rujjestris, 17. 
Russelliana, 3. 
Smithiana, 12. 
sphacehita, 16. 
stipularis, 10. 11. 
Stuartiana, 26. 
tenuifolia, 18. 
tenuior, 18. 
tetrapla 19. 
triandra, 6. 
undulata, b. 
vacciniifolia, 25. 
venulosa. 25. 
Timinalis, 10. 
vitellina, 4. 
Weigeliana, 19. 
Woolgariana, 8. 
2. Pop'uLrs Linn. Poplar. 
1. P. al'ba (L.) ; l.-buds do-svny, 1. roundish-cordate angularly 
toothed cottony and snoici/ wliite boieath, 1. of the young shoots 
cordate palmately 5-lobed, stiff. 2 linear bifid crosslike (yellow). 
— E.B.1618. — With suckers. L. generaUy lobed. Male catkin- 
Scales hairy. — Damp woods. T. III. IV. White Poplar. Abele. 
E. S. I. 
2. P. canes' cens (Sm.) ; l.-buds downy not viscous, 1. roundish 
obscurely lobed sparingly cottony and gray beneath, 1. of young 
shoots cordate-ovate undi\ided, diy. 2 loedgeshaped 3 — i-lobed 
(purple). — B.P. 1619. — With suckei-s. L. not lobed, except 
occasionally the voungest. Male catkin-scales hairy. — Damp 
woods. T." m. IV. Gray Poplar. E. 
3. P. trem'ula (L.); l.-buds glabrous slightly viscou.s, 1. nearly 
round acute serrate glabrous on both sides, young 1. slightly 
downy, stig. 2 bifid erect. — JS. B. 1909. — A small tree, with 
suckers. Petioles laterally conipressed. Male catkin-scales 
hairy, palmately cut. — ^^Voods. T. IV. Aspen. E. S. L 
4. P. nigra (L.); l.-buds glabrous viscous, 1. triangular-rhom- 
boidal acuminate sen-ate glabrous on both sides, catkins lax cylin- 
drical, stig. 2 roundish 2-lobed. — JE. B. 1910.-— large tree, with- 
out suckers. Petioles laterally compressed. Young shoots gla- 
brous. Male catkin-scales glabrous. — Damp places and river- 
banks. T. in. Black Pojjlar. E. 
