LXX 



iisqiie brevem adnotationem descriptionemque adderet. Ex praefa- 

 tione haec de Forbesii sententia nos edocent: „Tiie genus is divi- 

 ded into Osiers, Willows and Sallows. — But hitherto no Botanist 

 has been successful in loging down any good plan for their natural 

 arrangement. — The size and form of the leaves being also so liable 

 to change, by soil, situation, or other circumstances, especially on 

 young plants, is another inconvenience not easily surmounted. In the 

 discrimination of the specific distinctions I have found the most con- 

 stant and best characteristic marks in the germen, as being either 

 sessile or stalked, downy or smooth ; also in the length of the style 

 and stigmas." Exceptis extraeuropaeis et paucis prorsus dubiis de- 

 scriptae sunt iconibusque illustratae 122 formae, quarum plurimae 

 satis bene agnosci et ad nomina nostra revocari potuerunt. Occur- 

 runt ibi S. nigricanSy S. phylicifolia, S. Lapponumy 'S. Arhuscula, S. repens 

 aliaeque sub multis nominibus, praeterea magnus numerus earum, quas 

 nos ad hybridas relegavimus. Ex huius libri iconibus, comparatis cum 

 speciminibus vivis, quae e Woburn Abbey accepta in arboreto horti bo- 

 tanici regii berolinensis coluntur, quorumque bonam partem ipse colui, 

 et cum descriptionibus Smithii, de multis Smithii nominibus certiores 

 facti sumus. Praeterea autem ducis de Bedford collectio formas non- 

 nullas helveticas servavit, quae vel Seringii atque Schleicheri oculos 

 effugerant. Sequitur recensio iconum. Optimis!, dubiis? additum est. 

 S. purpurea 1. 3. S. triandra 15. 16. 17. 18. S. pruinosa 25. 

 S. daphnoides 26. S. fragilis 27. 29. 30. S. pentandra 32. 34.! 

 S. hastata 35.? 36. S. Weigeliana 38.? 39.? 44.? 45. 46. 51.! 52.? 

 54.? S. nigricans 53.? 97.? 101.? 102.? 103. 104. 105.? 106.? 

 107.? 108. 109? 110. 111. 112.? 113. 115.? S. Arbuscula 57.! 

 58.! 59. 138.! S. Myrsinites 60.! S. herbacea 62.! S. polaris 63. 

 S. retusa 64. 65.! 139. S. caesia 66.! S. reticulata 67.! S. glauca 

 68. 74. S. Lapponum 70.? 72.? 73. 75.? 77.? S. lanata 71. S. 

 repens 78. 79. 82. 83. 84. 86. S. incana 89. 90. S. grandifolia 

 98.? S. cinerea 120. 126. S. caprea 122. S. aurita 124. 125.? 

 S. Calodendron 131. S. viminalis 133. S. holosericea 135. S. alba 

 136. 137. vitellina 20. — S. purpurea-viminalis 5. 6. S. triandra- 

 viminalis Trevirani 7. S. alba-fragilis 19. 28. S. purpurea-cinerea 

 43. S. nigricans-phylicifolia 49.? S. purpurea-repens 85. S. vimi- 

 nalis^repens 87. S. incana-purpurea 88.? S. incana-caprea 91.? 

 S incana-repens 93. S. aurita-incana 96. S. cinerea-nigricans 100. 

 117.! S. caprea-nigricans 106.? 114.? 118. S. aurita-nigricans 119. 



