POl'VtVS, 



325 



damaecena, 16. 



Davalliana, 17. 



deeipieus, 3. 

 Doniana, 19. 



ferruginea, 11. 



Porbiana, 8. 



Forsteriana, 16. 

 fragilis, 3. 



fusoa, 20. 



glauca,, 28. 

 G-rahami, 27. 

 hasfcata, 23*. 



Helix, 7. 

 herbaoea, 29. 



hirta, 16, 



Hoffmanniana, 6. 

 kolosericea, 11. 



incubaoea, 20. 



iatrieata, 9. 



LambSrtlana, 7. 

 lanata, 24. 

 lanceolata, 5, 

 Lapponumj 23. 



laurina, 17. 



laxiflora, 17. 

 malifolia, 23*. 

 Meyeriana, 2. 

 Myrainites, 26. 

 nigricans, 16. 



nitens, 17. 



oleifolia, 13. 

 parvifolia, 20. 

 pentandra, 1. 

 petiolaris, 6*. 



petraia, 16. 



phiUyreifolia, 17. 

 phylieifolia, 17. 

 procumbens, 26. 



propinqua, 17. 



proetrata, 20.- 



prunifolia, 22. 

 purpurea, 7. 



radicans, 17. 



ramulosa, 7. 

 repens, 20. 

 reticulata, 28. 



retnsa, 26*, 27. 

 rosmarinifolia, 18. 

 rubra, 8. 



rugosa, 11. 



rupeetris, 16. 



EusBelliana, 3. 

 Saithiana, 11. 



sphaoelata., 16. 



stipulariB, 9. 

 etipularis, 10. 



Stuartiana, 23* 



tenuifolia, 17. 



tenuior, 17. 



tetrapla, 17. 

 triandra, 6. 

 undulata, 5. 



VacciniifoUa, 23/ 



Tenulosa, 22. 

 f iminalis, 9. 

 mridis, 3. 



vitellina, 4. 



Weigeliana, 17. 



Woolgariana, 7j 



2. Pop'tjlits Liwrl. Poplar. 



1. P. ttl'ha (L.) ; l.-buds downy, 1. roundisli-cordate angularly 

 toothed cottony and snowy lohite beneath, 1. of the young shoote 

 cordate palmately 5-lobed, stiff. 2 linear bifid crosslike (yellow). 

 — K B. 1618, — With suckers. L. generally lobed. Male cat- 

 kin-scales hairy. — Damp Woods. T. III. IV. White Poplar. 

 Abele. E. S. 



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

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

 shoots cordate-ovate undivided, stig. 2 wedgeshaped 3 — i-lobed 

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

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

 woods. T. IHi IV. Gray Poplar. E. 



3. P. tr&m'ula (L.) ; 1, -buds glabrous slightly viscous, 1. nearly 

 round acute serrate glabroiis on both sides, young 1. slightly downy, 

 stig. 2 bifid erect. — E. B. 1009. — A small tree, with suckers. 

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

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



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

 boidal acuminate serrate glciircms on both sides, catkins lax cylin- 

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

 without suckers. Petioles laterally compressed. Young shoots 



