58 Mr. Schweinitz o-n the Genus Viola. 



The following species, no longer labor under the diffi- 

 culties of the former. Nevertheless several of them re- 

 quire close examination, in order to be properly distinguish 

 ed, This is the case between the two V. cucullata and ob- 

 liqua, and again between villosa and cordifolia, so much so, 

 that Mr. Nuttall thinks them the same. My observations 

 upon the two former have led me to conceive, that they 

 ought to be distinguished ; as likewise the two latter, where 

 however, I am not perfectly acquainted with cordifolia, 

 having seen only dry specimens. The characteristics I 

 have to propose, have been formed upon very often repeat- 

 ed examinations of hundreds of individuals, and will I be- 

 lieve be found to hold good in most instances; though pos- 

 sibly single plants may occur, of so indefinite an appear- 

 ance, that it may be difficult to determine them. But this 

 happens in almost every Genus which has a number of 

 Species. 



6. Species. V. ovata. Nuttall. 



Pursch. FI. p. 173. n. 9 primu/aefolia exclus. Synoiu 

 Willdenow. 



Muhl. Cat. p. 27. n. 12 ciliata by Specimens; altogeth- 

 er the same. 



JVuttallp. 148. n. 4. 



Although Mr. Elliott cites Pursch to his primulaefolia h 

 is clear that he describes the true Linnean one and not the 

 present species. 



Mw-York Cat. p. 28. n. 6. 



V. acaulis : Foliis oblique ovatis, acuminatis, basi sub- 

 cordatis in petiolos decurrentibus, eosque alatos reddenti- 

 bus, crenatis, ad basin saepe lacerato-dentatis, utrinque 

 pubescentibus (rarius aetate provectiori glabriusculis.) 

 Petiolis brevioribus, statu juniori brevissimis, pilosis. Sti- 

 pulis radicalibus lato-lanceolatis, oblique acuminato-truncatis, 

 in truncatura denlatis, ceterum ciliatis, uncialibus, petiolum 

 basi amplectentibus. Foliis nervosis. 



Floribus maxime rjutantibus, majusculis, pulchre coeru- 

 leis. Pe^aZ/s obovalis ; binis lateralibus longiuscule albo- 

 barbatis et subvenosis ; infimo purpureo-venoso, barba 

 sparsa : superioribus nudis. Cornu aut nectario obtuso. 

 Calycis laciniis subreflexis, pilosis, oblongo-lanceolatis, 

 postice elongatis attenuati^. Stigmate recurve subrostrato, 

 non depresso. 



