84 



spikes numerous, the stems being sometimes excessively branched 

 above, no good fruit could be found. The plants grows at the 

 head of the Lake in company with Potamogeton lonchites, P. per- 

 foliatus, P. compressus, P. hydridus, P. Claytonii, P. pectinatus 

 and Bidens Beckii." Peck in N. Y. State Mus. Rep't 33: 35. 

 1880. Plants of P. Rohhinsii were found among Dr. Peck's 

 duplicates ; but he does not seem to have saved specimens of any 

 of the other pondweeds observed at Ballston Lake. 



Naias flexilis (Willd.) Rost. & Schmidt. Lakes and slow 

 streams. Lake George, 1876 (Hall); E. Lake George; Glen 

 Lake; Hadlock Pond; South Bay; South Beaver Creek and little 

 pond west of R. W. Bakers, Vaughns; Lake Lauderdale; Clarks 

 Pond, plants rather stout; Battenkill River south of Shushan. 

 The plants are usually sterile; but fine fruiting plants were 

 found in Harris Bay, Lake George, Aug. 28, 1899. 



The following species and varieties of pondweeds have been 

 found in the state of Vermont. Potamogeton epihydrus cayugensis 

 (Wiegand) Bennett; P. alpinus Balbis; P. Faxoni Morong; 

 P. angustifolius connecticutensis (Robbins) Bennett; P. hetero- 

 phyllus, forma terrestris Schlecht.; P.lucens L.; P. hnpleuroides 

 Fernald; P. confervoides Reichb.; P. foliosus Raf.; P. foliosus 

 niagarensis (Tuck.) Morong; P. rutilus Wolfg. ; P. Vasey, 

 Robbins; P. strictifolius Bennett; P. pusillus Sturrockii Bennetti 

 P. pusillus tenuissinms Mert. & Koch; P. filiformis Pers.; and 

 Zannichellia palustris L. Many of these have been found in 

 Lake Champlain and its tributaries: and a more careful survey 

 will probably add several of these to the Lake George region. 

 Hudson Falls, N. Y. 



THE DISCOVERY OF ENDOPHYLLUM SEMPERVIVI 

 (ALB. & SCHW.) deBARY IN NORTH AMERICA 



By George M. Reed 



The writer first observed this interesting rust of Sempervivum 

 in the alpine garden of the Brooklyn Botanic Garden on April 

 21, 1 91 7. One plant of Sempervivum alhernettii was found to be 



