LINDMAN, AMERICAN SPECIES OF TRICHOMANES SM. 



21 



Tr. quercifolium, Tr. Kraussii, is by him (]). 27) said to be a 

 form of »Tr. pusillum Sw.», — this latter described as in 

 Hook, and Bak. Synopsis (but not 2if(siUiim Herb. Swartzl). 

 Sadebeck, in Engler und Prantl, Die natürlichen Pflanzen- 

 familien, I: 4, p. 105, has quite excluded Tr. quercifolium from 

 the South American flora; where we should expect to find 

 this sjDecies, he has placed Tr. pusillum>; (non Sw.!) including 

 two forms: :vTr. quercifo- 

 lium Hook, et Grev.» from 

 South Africa, and vTr. pin- 

 natinervum Jenm.» from 

 South America. 



I am convinced that we 

 have to deal here with a 

 widely distributed South 

 American fern, which is by 

 no means to be confounded 

 with Swartz's Tr. pusillnm 

 (see my fig. 20 and 21 be- 

 low!), and which corresponds 

 exactly with the above men- 

 tioned illustrations of quer- 

 cifolium, montanum, and Jio- 

 hinsoni. There is conse- 

 quently not the least doubt 

 that the first name querci- 

 folium must be restored. 

 The first illustration, in 

 Hook, et Grev., t. 115, is 



not the best, and is evi- Fig. 9. Trichomnnes qucnifolium Hook. 



1 ,1 I'.ii J 1 et Grev.. upper half of a sterile frond from 



dently a little too large; Para-uay, Exi.ed. 1. Re-nell. n. A. 2207 

 but the next, Hooker's (X 5); B cells from the margin of an 



m J. ,1 involucre of Regnell's specimen in the itre- 



.Tr. montanum, accurately .^ding illustration fig. 8, C (x 90). 



reproduces the most typical 



form of this species; and the excellent drawing of »Tr. 

 Robinsoni», quoted above as a synonym, is one more proof 

 of its general appearance and, on an enlarged scale, of its 

 venation and the shape of its involucre. 



By the aid of these illustrations 1 have classified the 

 specimens of the Herb. Stockholm, viz. plants from Mexico 

 (Liebmann), Columbia (Moritz), North Brazil (Poeppig), Minas 



