438 DR. A. B. EENDLE — SUPPLEMENTARY 



/3. The common European form. Additional localities : — 



France — Seurre, Cote d'Or : Maine {Bouret)^ &c. 



Germany— Lyck and Borono-See, Prussia; Parstein-Sce, Wesen-See, and numerous 



localities in province Brandenburg ; Eiver Schlei, Silesia ; Lake Constance, near 



Wangen [Ziegler). 

 Hungary — Lake Balaton at Keszthely {Borbas). 

 Russia — Lithuania {Besser) ; the following localities at the mouth of the Volga : 



Jablouka, Tandik, Czilikino, and Algari (Korshinsky). 

 Switzerland — Lugano {Schinz). 

 Italy — Venetia (Bigo) ; Palermo {Boss). 



y. A large-fruited form. 



This form seems common in Switzerland and North Italy. I have notes of the 

 follo\\ ing localities : — Lugano, Lake Maggiore, Lake Como, Lake Varese, Verona, 

 Mantua, Lake Bientina. 



The specimens from Lake Maggiore, collected by Magnus and others, approach the 

 common form ; they have the habit with the large patent teeth of the large-fruited 

 form, but the fruit smaller than usual, scarcely 5 mm. long. 



I have also seen specimens from : — 



South Bussia— Mouth of the Volga, near Oli {Korsliinshy), without fruit. 



North Asia — Altai {Bolitow in Herb. Hort. Bot. Vindob.), a grossly dentate specimen 

 with unripe fruit. 



America — Arizona, Santa Cruz Biver (Bringle). 



Var. denticulata, var. nov. 



Sublaxa, internodiis elongatis sparsissime et breviter spinosis ; foliis linearibus, margine 



denticulatis, denticulis lamina) latitudine certe duplo brevioribus, vagina cum 



margine pauci- (1-3- ) denticulata. 

 BrancJies ascending, about 20 cm. long, lower internodes 4 to 5 cm. long, 1 mm. in 

 diameter, becoming gradually shorter above. Leaves ascendo-patent, 1"5 to 3 cm. long, 



1 to 1-3 mm. broad, bearing a few (3 to 5) small dorsal spines and 6 to 12 shallow teeth 

 on each margin, on the oldest leaves the teeth may equal half the leaf- width in length ; 

 sheaths- broad, 3 to 4 mm. long. Eemale specimens only were seen ; ovary with 3 

 stigmas; unripe fruit light brown, rather narrowly ellipsoidal, 3-5 mm. long by less than 

 1*5 mm. in diameter. 



Has the habit of a small example of the luxuriant form of the species, differing, 

 liowever, in its proportionately smaller marginal teeth. 



Central Asia — Semipalatinsk, River Ajaguz (Korshinsky). 

 Specimen communicated by the Botanic Museum of St. Petersburg. 



Var. Zollingeri, var. nov. 



Planta luxurians, internodiis inermibus ; foliis linearibus, planis, subacutis, marginibus 

 cum dentibus parvis frequentibus instructis, dorso inermi ; fructu mediocri. 

 Stems spreading, with short densely leaved branches. Leaves 3 to 4-5 cm. long by 



2 to 2-5 mm. broad, with 12 to 15 marginal teeth on each side, J to i the leaf- width 



