134 BOTANICAL GAZETTE [AUGUST 
amentis parvis); head of Allen’s ravine, August 8-15, 1905, Collins and Fernald 
(fr. im.; G.); north slope of same mountain, on hornblende schist, July 26, 
1906, Fernald and Collins (no. 500, m. paratype; G.; so1*, f.; G.; 503, 503%, f. 
adult., 505, f. type; G.); July 20, 1906, Fernald and Collins (no. 506, fr.; G.); 
on wet serpentine slopes, July 23, 1906, Fernald and Collins (no. 510%, m.; 
514, fr.; G.).—British CoLumsra: Selkirk Mountains, Rogers Pass, alt. 
1350 ny July 31, 1890, J. Macoun (no. 18°, f.; N.); Asulkan Valley, Glacier, 
alt. 1590 m., J. G. Jack, August 14, 1904 (fr.; A., G.); same place and date, 
A. Rehder (fr.; A.; both specimens identical with those like no. 506 from 
Gaspé).—ALBERTA: Lake Agnes near Laggan, August 11, 1904, A. Rehder 
(m., f.; A.; forma incerta quamvis ad S. petrophilam spectans); slopes of 
ravine on Mt. Aylmer, alt. 2250 m., August 4, 1899, W. C. McCailla (no. 2248, 
m., f.; Cor.); mountains above Lake Louise, alt. 1800-2400 m., July 21, 1907, 
F. K. Butters and E. W. D. Holway (no. 262, f.; N.; forma quasi ad S. petro- 
philam transiens sed foliis magis quam in hac specie discoloribus); Lake 
Louise, July 22, 1904, J. Macoun (no. 68883 O., fr.; N.); Fitzhugh Mountain, 
near teapes Park, August 1917, J. M. Wise Tobe: 95379, 95397; 95398, 
95401 O., fr., m.). 
This peculiar variety differs from the type chiefly in its less pubescent, 
mostly much more elongated, and yellowish twigs, in its almost glabrous 
young leaves, and in its aments which, on an average, are longer and thinner, 
at least much more loosely flowered toward the base. It is, apparently, 
closely connected with var. kophophylla, which as a whole has firmer leaves 
and denser and shorter catkins, but in its glabrous character comes nearer to 
var. araioclada than to the typical anglorum. See also my remarks under the 
following form. 
S. ANGLORUM var. antiplasta,° nov. var.—Frutex habitu ramu- 
lisque ut in var. araioclada; folia adulta chartacea, anguste ovalia, 
elliptico-oblonga, anguste obovato-oblonga, interdum oblanceolata, 
rarius elliptica vel obovato-elliptica, utrinque pl. m. acuta, raro 
rotundata, saepe apice breviter plicato-acuminata, vulgo 1.5~ 
2.5 cm. longa et vix ultra 1 cm. lata, maxima ad 3:1.3-1-5 
(rarius 1.8) cm. magna, integerrima vel interdum basim versus 
obsolete parce denticulata, superne subtusque ut in var. araioclada 
sed nervis lateralibus vulgo ut in petrophila angulo acutiore a costa 
abeuntibus et magis versus apicem currentibus; petioli graciles, 
2-8 mm. longi, vulgo sparse pilosi; amenta cylindrica, sub anthesi 
satis brevia et tenuia, vulgo sublaxiflora, ramulos laterales in mas- 
culis vix ad 1 cm. longos ceterum ut in araioclada terminantia, 
§ Derived from dvrirdacros, similar. 
