1920 J 



KE 



25 



leaf represented by him in his fig, 150 is finely glandular-serrate. Barratt 

 mentions a forma monstrosa with partly united filaments which he calls 

 var. monadelphia of which I have seen the type. Torrey (1843) gives a good 

 description and figure of typical S. tristis under the correct name. Anders- 

 son (1858) cites Gray's manual, and has a var. microphylla which is nothing 

 but the type- In 1867 he does not mention this variety, but he has three 

 other forms: glabrata, minor and longiflora. The first seems to belong to 

 S. humilis; the second which he called nivea in 18G8, 1 take to be S. candiday 

 while the third is probably typical 5. tristis. 



As I have already pointed out under S. humilis it is doubtful if S. tristis can 

 be kept as a distinct species or considered a variety of S. humilis, Griggs 

 who holds the latter view makes the following statement: "A depauperate 

 form of S. hiimilis with which it is connected by many intermediates. It 

 may be described as smaller and hairier throughout. It is quite low (to 

 6 dm.) with smaller leaves (to 5 cm. long) more strongly gray tomentose, and 

 catkins sometimes scarcely 5 mm. long. This can hardly be regarded as a 

 distinct species. There is not a single constant character by which the two 

 differ and what differences there are, are such as would be likely to be caused 

 by differences in environment. Such forms should be considered as va- 

 rieties rather than as species." 



I have seen specimens of S. tristis from the following states and Counties: 

 Massachusetts (Middlesex, Hampshire, Norfolk, Essex, Worcester, 

 Plymouth, Bristol and Barnstable Counties), Rhode Island, Connecticut 

 (New London and Middlesex Counties), New Jersey (Gloucester, Cumber- 

 land, Camden, Middlesex and Salem Counties), New York (Suffolk, Queens, 

 Nassau and King's Counties), Delaware (New Castle County), Pennsyl- 

 vania (Chester, Lancaster and Luzerne Counties), Virginia (Fairfax County), 

 District of Columbia, North Carolina (Rowan and Macon Counties), Ken- 

 tucky (Webster and Edmonson Counties), Tennessee (Robertson and Coffee 

 Counties), Florida (Leon County), Indiana (Vermilion, Cass and White 

 Counties), Illinois (Winnebago and Hancock Counties), Wisconsin (Sauk 

 County), Missouri (St. Louis, Phelps, Jasper and Atchison Counties), 

 Nebraska (Brown and Custer Counties), Mississippi (Kemper County; an 



humilis?), Iowa (Hamilton, Boone, Harrison, Johnson, Floyd and Story 



Counties). 



Vienna, April, 1920. 



A PHYTOGEOGRAPHICAL SKETCH OF THE LIGNEOUS 



FLORA OF FORMOSA 



E. H. Wilson 



The island of Formosa is off the east coast of China and is situated between 

 21° 45' N. latitude and between 119° 18' and 122° 6' E. longitude. It is 

 oblong in shape and about 244 miles long and in the widest part is 75.6 mik s 

 broad; at the extreme south its breadth is only 7.3 miles while in the extreme 



