CHAP. CHI. SALICA^CE.flE. SA^LIX. 1529 



Group vii. Nigra, 



Extra-European Kinds allied to the Kinds of one or all of the three preceding 



Groups. 



Of the willows of Europe Koch has (Comm.) associated the kinds of Mr. 

 Borrer's groups Pentandrae, Fragiles, and A'lbae into one group, which he 

 has named Fragiles ; and he has pointed out and described, as extra- 

 European kinds belonging to it, S. occidental's Bosc, S. nigra Muhl., S. 

 babylonica L., S. octandra Sieber, and S. Humboldtmrca Willd. Mr. 

 Borrer has included S. babylonica L. in his group Fragiles. The rest are 

 here collected in a group by themselves, to which is added S. /igustrina 

 Michx. jun., from the notice by Mr. Forbes, and also by Michaux, that it is 

 similar to S. nigra. 



¥ 28. S. ni^gra Muhlenb. The black, or dark-branched American, Willow. 



Identification. Muhlenb. in Nov. Act. Soc. Nat. Scrut. Berol., 4. p. 237. t. 4. f.5. ; Sims and Konig's 

 Ann. of Bot, 2. 65. ; Willd. Sp. PL, 4. p. 657. ; Michx. N. Amer. Syl., 3. p. 78. ; Pursh Fl. Amer. 

 Sept., 2. p. 614. ; Smith in Rees's Cyclo., No. 11. ; Forbes in Sal. Wob., No. 152. ; Koch Comm., 

 p. 17., note. 



Synonymes. S. caroliniana Michx. Fl. Bor. Amer., 2. p. 226. ; S. pentandra Walt. Fl. Car., 243. ; 

 S. vulgaris Clayt. Fl. Virg. 



The Sexes. Both sexes are noticed in the specific character. Willdenow had seen the male alive, 

 and both sexes in a dried state. 



Engravings. Nov. Act. Soc. Nat. Scrut. Berol., 4. t. 4. f. 5. ; Ann. of Bot., 2. t. 5. f. 5. ; Michx. N. 

 Amer. Syl., 3. 1. 125. f. 1., without flowers ; Sal. Wob., No. 152., the leaf; and fig. 152. in p. 1630. 



Spec. Char., 8(C. Leaves ovate-lanceolate, pointed, serrated, green on both sides, glabrous, except a 

 downy rib and footstalk. Catkins accompanying the leaves, villous. Stamens about 5, bearded at 

 the base. Ovary stalked, ovate-lanceolate, glabrous. Stigmas divided, the length of the style. 

 (Sal. Wob., p. 280.) Catkin upon a seeming peduncle, which is a leafy twiglet. Stalk of the cap- 

 sules 3 — 4 times as long as the gland. Stigmas ovate, emarginate. {Koch Comm., p. 17., note *) 

 Branches of a dark purple colour. Disk of leaf 2 in. or more long. (Willd.) A tree, 20ft. high, 

 with smooth branches, brittle at the base ; a native of North America, from Pennsylvania to Vir- 

 ginia, on the banks of rivers. Introduced in 1811, and flowering in May. Mr. Forbes observes 

 that S. Zigustrina of Michaux differs principally from S. nigra in its larger stipules, which resem- 

 ble, as well as the leaves, those of S. triandra. (Sal. Wob., p. 28.) There are plants in the Hackney 

 and Goldworth arboretums, and at Woburn Abbey. 



*& 29. S. Humboldt ia s na Willd. Humboldt's Willow. 



Identification. Willd. Sp. PL, 4. p. 657 ; Smith in Rees's Cyclo., No. 8. ; Humb. et Bonp. Nov. 

 Gen. et Sp. PL, 2. p. 176.; Forbes in Sal. Wob., No. 8. ; Koch Comm., p. 18., note; Lodd. Cat., 

 ed. 1836. 



The Sexes. Both sexes are figured in Sal. Wob., copied from Humb. et Bonp. Nov. Gen. et Sp. Pi. 

 Koch has noticed (Comm., p. 18., note) that in specimens which he had seen there were andro- 

 gynous catkins mixed with catkins of female flowers. 



Engravings. Humb. et Bonp. Nov. Gen. et Sp. PL, t. 99. and 100. ; Sal. Wob., No. 8. ; and fig. 8. 

 in p. 1604. 



Spec. Char., $c. Leaves linear, acuminated, finely serrated, smooth. Catkins 

 appearing late, after the expansion of the leaves. Flowers polyandrous. 

 Ovary stalked and glabrous. {Willd. Sp. PL, iv. p. 657.) Branches brown, 

 shining, erect, flexible. (Sal. Wob., p. 115.) A native of Peru, and culti- 

 vated in various places in! South America. It was introduced in 1823 ; but, 

 being somewhat tender, it had not, in 1829 (the date of the Salictum Wo- 

 burnense), produced its flowers in England. Mr. Forbes finds, at Woburn, 

 that it requires the protection of a green-house ; but, in the Horticultural 

 Society's Garden, it stood out against a wall for 6 years ; and, though it was 

 killed in the spring of 1836, Mr. Gordon is of opinion that it was not 

 altogether owing to its tenderness. There are plants in the collection of 

 Messrs. Loddiges. 



& ? *£ 30. S. Bonplandz/a^ Humb. et Bonpl. Bonpland's Willow. 



Identification. Humb. et Bonpl. Nov. Gen. et Sp. PI., 2. p. 20. ; Forbes in Sal. Wob., No. 9. 



The Sexes. Both sexes are figured in Sal. Wob., copied from Humb. et Bonp. Nov. Gen. et Sp. PL A 



plant in the Woburn collection had not flowered in 1829. 

 Engravings. Humb. et Bonpl. Nov. Gen. et Sp, PL, t 101, 102. ; Sal. Wob., t. 9. ; and fig. 9. in 



p. 1604. 



