igig] SCHNEIDER— AMERICAN WILLOWS 57 



17. S. STOLONiFERA Covillc. — I mentioned {I.e. 137) a new f. 

 subpilosa of which as type may be taken B. E. Fernow's specimen 

 from Glacier Bay, Point Gustavus, June 10, 1899 (Cor.). There 

 are specimens before me from the same bay, Muir Glacier, collected 

 between June 8 and 12, 1899, by F. V. Coville and T. H. Kearney 

 (no. 621, f.; W.). Coville is of the opinion that they, at least 

 partly, represent a hybrid between 5. arctica and S. stolonifera. 

 One of the sheets (no. 373447, W.) looks indeed Hke such a hybrid; 

 the leaves seem not to possess stomata in the upper epidermis and 

 are partly larger, while the flowering aments measure up to 3 : i cm. 

 The other specimen (of sheet no. 376920), however, can hardly be 

 separated from 5. stolonifera except by the tomentose ovaries. The 

 leaves have numerous stomata in the upper epidermis, are of the 

 usual size and shape, and the aments are not larger than in typical 

 stolonifera. This specimen looks to me more like f. subpilosa than 

 like a hybrid. It may be, however, that we have to take all the 

 specimens with more or less pubescent ovaries and fruits for those 

 of hybrid origin, but this does not seem hkely to me. 



18. S. ARCTOPHiLA Cock.— Profcssor T. D. A. Cockerell 

 kindly informed me that he had published in the last edition of 

 Heller's Cat. N. Am. PI. p. 89, 1910, this new name for S. groen- 

 landica Lundstrom but not of Heer (Fl. Foss. Arct. 1:101. pi. 4. 

 figs. 8-10. 1868). I was not aware of this fact, neither had I seen 

 the sheets of this edition of Heller's Catalogue. Besides, Cocker- 

 ell's name is not found in the card index published by the Gray 

 Herbarium. I accept this new name, but there is no definite 

 statement in the international rules as to the priority of names 

 of paleontological plants. Owing to this change I have to propose 

 the following new combination, S. arctophila var. lejocarpa for 

 S. groenlandica var. lejocarpa Lange {I.e. 141). 



1 8a. S. hudsonensis, spec. nov. — S. fullertonensisXS. groen- 

 landica Schneider in Bot. Gaz. 66:342. 1918. — Frutex prostratus 

 habitu S. arctopJiilae, ramis pl.m. subterraneis radicantibus ad 

 5 mm. crassis, ramuHs elongatis repentibus glabris ut in S. arctophila 

 coloratis, gemmis foliisque ut I.e. a me descriptis sed gemmis inter- 

 dum ad 9 mm. longis et foliis angustioribus acutioribus ad 3 . 5 : i . 7 

 cm. latioribus ad 3 . 5 : 2 cm. magnis superne vulgo haud stomatiferis 



