1919] SCHNEIDER, NOTES ON AMERICAN WILLOWS. V 31 



South Carolina, AikenCounty: Hamburg, along Savannah River, September 

 24, 1913, J. Tidestrom (No. 6950, st.; M.). Beaufort County: Yemassee, open 

 moist ground, April 22, 1917, C F. Batchelder (fr. im.; stomata superne sparsa). 

 Charleston County: Charleston, in low ground, April 8, 1918, T. G. Harbison 

 (Nos. 1, f., 2, m.; A.; *'small slender tree; bark shallowly furrowed; twigs brittle- 

 jointed"; omnibus partibus juvenilibus tomentosis); in swamp, same date, T, G. 

 Harbison (No. 3, fr. im.; A.; ** small tree; twigs brittle-jointed: bark furrowed but 

 not scaly; omnibus partibus multo magis glabrescentibus quam In no. 1-2; stomata 

 superne in foliis non visa; No. 4, m.; A.; "small tree, twigs brittle-jointed"; agrees 

 well with type; No. 5, m.; A.; "large shrub; twigs brittle-jointed"; ut praecedens; 

 No. 7, m.; A.; ** shrub G ft, tall; bark smooth; twigs brittle-jointed"; ut praecedens); 

 Isle of Palms, May 30, 1902, C. R, Ball (No. 5G, st.; O.; *'12 ft."; stomata superne 

 pauca adnervos, folia ad 13:2.5 cm. magna, petiolis 6-9 mm. longis). Georgetown 

 County: Georgetown, in low ground, April 2C, 1918, T, G. Harbison (No. 5, fr.; A.; 



*'tall shrub; twigs brittle-jointed"). 



North Carolina, Wayne County: Goldsboro, in low ground, June 8, 1918, 

 T. G. Harbison (No. 17, st.; A.; *'small tree"; folia ad 12: 2.G cm. magna, superne 

 stomatibus subnumerosis praedita; stipulae semicordatae plus minusve acutae, 

 intus glanduliferae). Columbus County: swamps, June, 1895, W. W. Ashe (No. 



1325, St.; C; forma incerta). 



Virgixia. Smyth County: about Falls of Holston River, 700 m., June 8, 1892, 

 J. K. Small (fr.; A., C, M.; forma satis ad S. Harhisonii accedens). Norfolk 

 County: borders of Dismal Swamp, May 16, 1877, Th. Morong (m., fr. im.; N.; 

 forma porro observanda, ad S, longipedem accedens, sed folia superne sparse 

 stomatifera). 



The specimens referred by me to S. Harbisonii look, at the first sight, 

 very much like S. longipes (especially var. venulosa). I would have taken 

 them for this species if it were not for the ])rittle-jointed twigs. Besides 

 this the presence of stomata on the upper side of the leaf, and the minute 

 glands on the inner surface of the stipules induced me to describe a new 

 species. After all, however, it seems hardly possible to draw a sharp line 

 between it and S. longipes venulosa wdiich has been collected in almost every 

 locality where S. Harbisonii is found. I first thought that these forms 

 might represent hybrids between S. longipes and S. nigra, a fact that would 

 easily explain the brittle-jointed twigs, the presence of the stomata in the 

 upper surface of the leaves, and of the glands on the stipules. S. riigra is, 

 however, kno\\Ti only from a few of the localities where S. Harbisonii is 

 growing, and this species seems to be the prevailing one in most of the 

 j)laces where it is found. It cannot be regarded as a mere variety of S, 

 longipes on account of the brittleness of the twigs, even if we would lay no 

 stress u]>on the presence of the stomata wliich after all seems to be a rather 

 imi)ortant taxonomic character. S. Harbisonii certainly needs a closer 

 study in the field, and a final statement as to its specific value or hybrid 

 origin can only be made when we have become much better acquainted 

 with those forms of xS. nigra which I have enumerated on p. 8. S. riigra 

 may be more frequent than we have reason to believe now, and if it should 

 be found together with Harbisonii the hybrid origin of this species could 

 be easilv understood. 



I shall be glad to receive material of all the doubtful forms of the 



