200 DICOTYLEDONS. SAUCING. Alnus. 



38. S. caprea, leaves ovato-elliptical acute serrated and undu- 

 lated at the margin downy beneath, stipules semicordate, ger- 

 mens pedicellate lanceolate-subulate silky, stigmas sessile un- 

 divided, p. 286. Woods. 



39. S. acuminata, " leaves lanceolato-oblong pointed waved 

 slightly toothed downy beneath, stipules kidney-shaped, cap- 

 sules ovate tapering." p. 286.- Moist woods. 



40. S. stipularis, leaves lanceolate very indistinctly crenate white 

 and downy beneath, stipules large semicordate acute, " ger^r 

 mens shortly pedicellate ovate downy, style a little elongated, 

 stigmas long awl-shaped recurved entire, nectary cylindrical." 

 p. 286. Willow -grounds. 



41. S. mollissima, \caves lanceolate obscurely crenate white and 

 covered with silky pubescence beneath, stipules rather small 

 semicordate acute, germens lanceolate-subulate very silky 

 shortly pedicellate, style elongated, stigmas long linear mostly 

 entire, p. 287. Willow-grounds. 



42. S. viminalis, leaves linear lanceolate obscurely crenate white 

 and silky beneath, stipules very small sublanceolate, branches 

 straight and twiggy, germens upon very short footstalks silky 

 lanceolato-subulate, style elongated, stigmas long linear mostly 

 entire. p. 287 . Willow -grounds, &c. 



43. S. alba, leaves elliptical lanceolate regularly glanduloso-scr- 

 rate acute silky beneath often so above, germens ovate-acumi- 

 nate nearly sessile glabrous, stigmas nearly sessile short recurved 

 bifid, scales short pubescent at the margin, p. 287.- Mea- 

 dows and hedges. 



2. POPULUS. 



Dioecious. Catkins cylindrical; scales lacerated. Barren Fl. 

 Anth. 8 30 arising from a turbinate, oblique, entire, single 

 perianth. Fertile Fl. Perianth turbinate (entire)? Stigmas 4, 

 Caps, superior, 2-cclled, 2-valved, many-seeded. Seeds co- 

 mose. 



1. P. alia, leaves roundish cordate lobcd toothed glabrous above 

 downy and very white beneath, fertile catkins ovate, stigmas 

 4. p. 288. Plantations. 



2. P. tremula, leaves nearly orbicular broadly toothed glabrous 

 on both sides, petioles compressed, " stigmas 4, auricled at 

 the base.*' Sm. p. 289. Moist woods. 



3. P. nigra, leaves deltoid acute serrated glabrous on both sides, 

 fertile catkins cylindrical lax, " stigmas 4." Sm. p. 289. 

 Plantations. 



3. ALNUS. 



Monoecious. Barren Fl. with long cylindrical catkins; their 

 scales 3-lobed, 3-fiowered. Perianth 4-partite. Slam. 4. 

 Fertile Fl. with ovate catk'ms; their scales subtrifid with 2 

 flowers. Perianth 6. -Styles 2. Fruit a Nut, compressed. 



