136 
SILVA OF NORTH AMERICA. 
SALICACEZ. 
from the Arctic Circle to the northern United States, and from the shores of the Atlantic Ocean to 
British Columbia and California. 
The wood of Salix cordata, var. Mackenzieana, has not been examined. 
Brewer & Watson Bot. Cal. ii. 85; Coulter Man. Rocky Mt. Bot. 
335 ; Watson & Coulter Gray’s Man. ed. 6, 484.— Dudley, Bull. 
Cornell University, ii. 90 (Cayuga Fi.). 
Salix rigida, Muehlenberg, Neue Schrift. Gesell. Nat. Fr. Ber- 
lin, iv. 237, t. 6, £. 4 (1803); Konig & Sims Ann. Bot. ii. 64, t. 5, 
f. 4.— Willdenow, Spec. iv. pt. ii. 667.— Pursh, Fl. Am. Sept. 
ii. 615. — Forbes, Salict. Woburn. 277. — Hooker, Fl. Bor.-Am. 
ii. 149. — Trautvetter, Mém. Sav. Etr. Acad. Sci. St. Pétersbourg, 
iii. 624. — Barratt, Sal. Amer. No. 27.— Torrey, Fl. N. Y. ii. 
212. — Emerson, Trees Mass. 276. 
Salix angustata, Pursh, 1. c. 613 (1814). — Carey, Gray’s Man. 
427. 
Salix Torreyana, Barratt, 1. c. No. 29 (1840). — Emerson, J. c. 
277. 
Salix cordata, var. rigida, Carey, 1. c. (1848). 
Salix cordata, subspec. rigida, Andersson, Svensk. Vetensk. Akad. 
Handl. ser. 4, vi. 158 (Monographia Salicum) (excel. vars. a myri- 
coides, d vestita) (1867). 
Salix cordata, subspec. rigida, a latifolia, Andersson, J. c. 
(1867). 
Salix cordata, subspec. rigida, b angustifolia, Andersson, l. c. 159 
(1867). 
Salix cordata, subspec. angustata, Andersson, J. c. (1867). 
Salix cordata, subspec. angustata discolor, Andersson, l. c. (1867). 
Salix cordata, subspec. angustata viridula, Andersson, l. c. (1867). 
Salix cordata, subspec. angustata vitellina, Andersson, J. c. 
(1867). 
Salix angustata crassa, Andersson, l. c. (1867). 
Salix myricoides, K. Koch, Dendr. ii. pt. i. 579 (in part) (not 
Muehlenberg) (1872). — Koehne, Deutsche Dendr. 98. 
Salix myricoides, a cordata, Dippel, Handb. Laubhoizk. ii. 83, f. 
134 (1892). 
Salix myricoides, b rigida, Dippel, 1. c. (1892). 
Salix myricoides, ec angustata, Dippel, J. c. (1892). 
A form of Salix cordata, the so-called Diamond Willow (Salix 
cordata, var. vestita, in part at least of many authors but not of An- 
dersson), frequently confounded with Salix Missouriensis, is remark- 
able for the arrest of wood growth at the atrophied branchlets, 
causing the presence of large diamond-shaped depressions on the 
stems; it is a tall shrub of the middle Missouri River basin, where 
in South Dakota it is the most characteristic woody plant, its 
peculiar clumps of numerous stems sometimes thirty feet tall 
forming one of the prominent features of the vegetation along the 
borders of streams. In eastern Nebraska, where it is less abun- 
dant, it is called Red Willow. The reddish wood is said to be dur- 
able and used for stakes and fence-posts. (See Williams, Garden 
and Forest, viii. 493.) 
A small and little known arborescent Willow of this group (Sa- 
lix lutea, Nuttall, Sylva, i. 63, t. 19 (1842). Salix cordata, var. lutea, 
Bebb, Garden and Forest, viii. 473 [1895]), of southern Assiniboia 
and northern Montana, is not included in this volume, as it has been 
impossible to obtain sufficient material from which to make the 
plate, which, it is hoped, will appear later. 
EXPLANATION OF THE PLATE. 
Prate CCCCLXXIX. Sarr corpaTA, var. MACKENZIFANA. 
1. A flowering branch of the staminate tree, natural size. 
2. A staminate flower with its scale, front view, enlarged. 
3. A flowering branch of the pistillate tree, natural size. 
4. A fruiting branch, natural size. 
5. A capsule, enlarged. 
