DIOECIA. DIANDRIA. 23 i 



scales. Corolla none. JS'*cctariferous glands at 

 the base of the stamina. Slamina I to 6. Fem. 

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

 cd, 2-vaIved. Seeds woolly. 



Larg-e or small trees or shrubs, rarely suffruticose or 

 sublu'vbaceuus; aments axillary and terminal. 



Species. 1. S. vinunaUs. Introduced. 2. Candida. 3. 

 JMuJdenbergiana. 4. tristis. 5. recurvata, Ph. 6. repens. 

 7' reticulata. 8 vcstita, Ph. 9. Uva 7irsi, Ph. 10. cor- 

 difolia, Ph. 11. obovatayTu. Scarcely distinct frorn S.ves- 

 tita of the same, ;«nd both are pro!)ably varieties of .S". are- 

 naria? 12. planifolia. 13. pedicellaris. 14. rosmaritnfolia. 

 IS.fuscata, Pk. 16. conifera. 1?. myricoides. 18. disco- 

 lor, also probably S. prinoides, Ph? 19. louqifulia. S. an- 

 gustata, Ph. The most abundant species on the lowest 

 alluvial formations of tiie Missouri and Missisippi, proba- 

 bl}- extending' to the' sources of tliose rivers. Obs. Leaves 

 of the young- plants, afier tb.e cu'yledones, subplnnatifiJ. 

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

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

 Missisippi. 22- Incida, S3, rigida. (S. cordata, Mich.) 

 24. cordata. 25. grisea. 26. petiolaris. "27. alba. 23. ri- 

 tellina. These 2 last cultivated, or introduced. 29. myr. 

 sinites. 30. herbacea. 



This g-enus containing probably more than 130 species 

 is chiefly confined to the northern parts of Europe and 

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

 cies are as }et described to be indig-enous tothe Southern 

 hen)isphere, namely 1 in Peru, fS. Humboldtiana ) 1 in 

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

 cronate leaves. 



81. FRAXINUS. i. (Ash.) 



Cilix none, or 4-parted. Corolla none, or of 

 4 petals. Fisiil 1, Samara I -seeded, the wing- 

 lanceolate. 



Trees with opposite, unequally piuualed leaves; flowers 

 paniculate, arising from distinct buds producd in the ax- 

 ill i, of preceding leaves? hermaphrudite and female flow- 

 ers on distinct plants. 



SrEciEs. 1. F. sambiici folia- 2- cjiiadrangulata. {WXyie 

 Ash.) Tlie chips cornmLuiicafing a pal^ bhiecjlt)u:- tothe 

 valcr in which they are steep.>d. 3. epiptera. 4. acnmi- 

 natu. 5. caroU)iiana. 6. phitycarpa. 7- pubescens. 8. 



