Hegelmai er April 7, 186T - # - 



the Cörus classicus mentioned in the description ( Staten- 



Island), Lemna perpusilla is according to my opinion not only one 

 of these L.Torreyi , but should be specifically separated f ro mL.mi- 



belong of the received numbers the f ollowing^ : 1) Staten Island 

 (Torr), 2) Wayne ,Pennsylv. (Austin) 3)Western Missouri" (Broadhead)) 

 k) ponds on the hüls about St. Louis (Pendler 5)Pennsylv. near the 

 Leikawaxen (??? E.D.) River (Austin) 6) Cuba (Whright N.3215) • • 

 I do not put much valua on a dif f erentiation of a var« tr i nervi s, . 

 one sees the 3 nerves always with proper treatment. Of more impact 

 is an other difference; there are forms with many and forms withr 

 few rib¥bed seeds (40 - 50; 1^- - 16 ribs) i • var multi - and pauci - 

 costata mihi; I can find this difference only throuprh exactingr, 



4 ^' dissection, externally the forms are so similar,that 



despite the strikinsr difference mm certainly no specific distin- 

 guishing fact can be based on it.. The pauci costata seems to be the 

 more southerly fomr; and I saw her fist - and that in the herba - 

 rium of Karsten - from Venezuela; and Karsten x^anted to name her 

 in a letter L . Hegelmai eri , while I intend to describe them, as saidf 

 already as D. paucieostata or L. perpusilla« . To this belongs also the 

 kind from Cuba and - the one from St. Louis (Fendler) • . To the L.mul- 

 ticostata belong the other kinds from the Union* . Anyhow, ,thi s L.per- 

 pusilla i has the good trait, in contrast to the others.to produce 

 industrialiy fruits« 



KTöw, as to the perpusilla enberlida Aust. and gibba americana ,, 

 I confess, that despite carefull dissection, I cannot distinguish 

 her from our L. minor . The first is in any case no pe^pusillai, the 

 latter no gibba« If specific characteri stics should not be present«, 

 which have escaped me until now,, then I must pull the forms belon- 



