584 



emarginatis, septem — iiovemnerviis, versus basim sensim attenuatis, 

 supra scabrido - puberulis, laete viridibus, subtus villosrs, albicanti- 

 bus, anguste lamellato - nervosis , nervis in aream semiorbicularem 

 confluentibus: petiulo compresso, lato , utrinque prominente- nervoso, 

 ongissime viiloso. 



Folia 1 — iVa poll, longa, apice ^A — 1 poll, basi Vs poll. !«*«• 

 Petioli exteriores V4 poll, longi. 



In iDundatis Brasiliae (Gardner n. 3 171. Herb. Vindob.)- 



15. P. Schleideniana Kl. Foliis obovatis, apice rotundatis, 

 leviter emarginatis, septem — iiovemnerviis, supra saturate viridibus, 

 minutissime furfuraceis, subtus glaucis, puberulis, nervis plica e form 1- 

 bus, satis elevalis in aream brevem basilarem contiuentibus; stoloni- 

 bus adpresse pubescentibus. 



Folia H/^ poll. *Jonga, infra apieem pollicem, basi 4 — 5 lin. lata. 



P. spathulata Schleideo in Otto et Dietrich Gartens, v. 

 VI, p. 20, n. 7 (excl. synon. et diagn.). 



In aquis stagnantibus prope Estero reg. calid. Mex* (Scbiede 

 n. 842. Berlandier.) 



16. P. Texensis Kl. Foliis elongalo-obovatis, 5 — 9-nerviis, 

 apice rotundatis, levissime emarginatis, infenie cuoeato-attftiuat'Sj 

 supra laete viridibus, sparsim puberulis, subtus glaucescenti-albican- 

 tibus, nervis magis prominentibus, acie fuscescentibus, in aream ooo 

 vatam coniluentibus; perigooii squama foeminei minuta, obcordaU; 

 stolonibus glabris, laevibus. ,, 



Folia 2 — 5 poll, longa, infra apicem 1 —2 poll., basi Va- /* 

 poll, lata 



P. Turpini C. Koch in Mohl et S chlecbtendal bot Zei- 

 tuug V. 10, p. 577. I 



Id aquis stagnantibus Texas (Lindbeimer Hb. Berol. I««»* 

 Hb. Al. B ran nil). 



17. P. spathulata Mx. Foliis obovato-orbicularibus, fo* ' 

 datoobtusis, in petiolum abrupte angustatis], quinque — septeinner ^^ 

 area destitutis, utrinque glaucescentibus, nervoso -prominentibua,^^^^ 



pra dense et minutissime furfuraceis, subtus puberulis; ^^^^^^ ^|j,gj 

 subtus fuscesceiitibus; stolonibus ut videtur coinplanatis, uniUt*^* 

 pubescentibus. 



Folia iy<i poll. loDga, IV4 poll, in diametro. Pl^fi 



Michaux Flora boreali americ. vol. II. p. 162. ?«'*•" 

 Am. sept. V. 1. p. 268. . ^uiac 



In aquis stagnantibus Carolinae, Novo- Aureiiani, Henv 

 (Poeppig et alii). , par- 



Drei dieser Abhandlung beigegebene Steintafein sind ae ^^^ 

 stellong der Vegetationsverhaltnisse, der Biutheotheile und d^ 

 tomie von Pistia Texensis gewidmet. 



Redacteur and Verleger: Dr. Furnrohrin Re^entbarf. 



