igig] SCHNEIDER— AMERICAN WILLOWS 37 



tifera vel amenta fructifera majora et fructus 

 8-10 mm. longi peclicellis glandulam ad duplo 

 superantibus. 



Folia superne haud stomatifera."* 



Fructus pedicello subnullo vel brevi glandu- 

 lam haud superante suffulti, 6-8(-io) mm. 

 longi; amenta sub anthesi 1-2.5:0.7 cm., 

 fructifera ad 3-5 : i . 2-1 . 5 cm. magna pl.m. 

 densa; folia (var. atra excepta) tantum | ad 

 2^plo longiora quam lata, elliptica, ovalia, 

 obovato-elliptica, obovato-oblonga, vel ovato- 

 elliptica, apice pl.m. obtusa vel breviter 

 acuta, basi obtusa vel late cuneata ad sub- 

 cordata, 3:2 vel 3.5:2.5 vel 4.5:2-2.3 ad 

 6:2.8 cm. magna, novella pubescentia (mini- 

 mis infimis exceptis) pl.m. villosa induta, 

 superne glabrescentia, rarius adulta utrinque 



glaberrima 26. S. cordifolia 



Fructus pedicello glandulam vulgo \ ad 2plo 

 superante instructi, 7-8(-9) mm. longi; 

 amenta sub anthesi 2-4:0.8-1 cm., fructifera 

 3 . 5-7 : 1 . 5 cm. magna, basi saepe satis laxi- 

 flora; folia vulgo 2^ ad ultra 4plo longiora 

 quam lata, lanceolata, oblanceolata, elliptico- 

 oblonga, obovato-oblonga vel obovato- 

 elliptica, apice obtusa vel vulgo acuta vel fere 

 breviter acuminata, basi obtusa vel subito 

 sensimve cuneata, mediocra 4.5:2 ad 5:1.5 

 vel 7:2.3 cm. magna, novella pubescentia 

 satis sericea induta, superne paullo vel 

 omnino glabrescentia, subtus saepe glabriora 



25. 5. glaucae varietates 

 Folia superne stomatifera, ceterum ut in vol. 66, 

 p. 349 descripta 27. S. anamesa 



t Owing to the variability of the nos. 24-26 and our insufficient knowledge of the 

 Greenland forms I cannot avoid using this anatomical character in distinguishing 

 S. anamesa from the other two species. But S. anamesa is apparently a species met 

 with only in Greenland, and therefore the arrangement of the key wUl not be incon- 

 venient to most of the students of American willows. 



