BIOECIA. DIANDRIA. 23 1 



scales. Corolla iiojie. »^'*edanferous glands at 

 the base of tlie stamina. Slam'uia I to 6. Fem. 

 Flower as the male. Style hifid. Capsule 1-cell- 

 ed, 2-valve(l. Seeds woolly. 



Large or small trees or shrubs, rarely sufFruticose or 

 sublitrbaceous; uments axillary and terminal. 



Species. 1. S. viminalis. liuroduced 2. Candida. 3. 

 Muhlenberg'iana. 4. tristis. 5 recnrvaXa, Pn. 6. repens. 

 7. reticulaia. 8 vestitu, Ph. 9. Uva iirsi. Ph. 10. cor- 

 difoliUyPii. 11. obovata, Ph. Scarcely distinct from 5'. tjjs- 

 tiia of the same, and both are probably varieties of S- arc- 

 nariaP 12. planifoUa. 13. pedicellaris. 14. rosmarimfolia. 

 IS.fuscuta, Ph. \^. coidfera. 1?. myricoides. i8. disco' 

 lor, also probably S. prinoidea, Pn? 19. lonq-ifolia. S. an- 

 gustata, Ph. The most abundant species on the lowest 

 alluvial formations ottiie Misso\'.ri and Missisippi, proba- 

 bly extendinj:^ to tlie sources of those rivers. Obs. Leaves 

 of the young- plants, after tlie cotyledones, siibpinnatinj. 



20. babylonica. (Weeping Willow.) CJeneraliy cultivated. 



21. nigra, v. v. On the banks of the Missouri and tho 

 Missisippi. 22- hicida, 23. rigida. (^S. corduta, .Mich.) 

 24. cordata. 25. grisea. 26, petiolaris. 27. alba. 2d. vi- 

 teUina. These 2 last cultivated, or introduced. 29. vvjr^ 

 sinites. 30. herbacea. 



This g-enus coniaining probably more than 130 species 

 is chiefly confined to the northern pTirts of i'.urope and 

 America; many of the species are alpine. Only 4 spe- 

 cies are as yet described to be indigenous to the Sou'hcrn 

 lienusphere, namely 1 in Peru, fS. HumboJdtiana) 1 in 

 India, and 2 species at the Cape of Good Hope with mu- 

 cronate leaves. 



81. FRAXINUS. X. (Ash.) 



Cilix none, or 4 -parted. CorGlla none, or ai* 

 4 petals. Fistil 1. Samara 1 -seeded, the wing 

 lanceolate. 



Trees wiih opposite, unequally pinnated leaves; flowers 

 paniculate, arising from disiinct buds produced in the ax- 

 il! s of preceding leaves? hermaphrodite and female flow- 

 ers on distinct plants. 



Species. 1. P. sambucifolia. 2- guadrargndata. (Blue 

 Ash.) The chips communicating a pale blue colour to the 

 water in which they are steeped. 3. epiptera. 4. aciimi' 

 nata. 5. caroliiiiima. 6. plafycarpa. 7. pnbescens. 8. 



