EEA^ISION OF THE GENUS NAJAS. 411 



Var. intermedia, Cesati, Compend. Fl. Ital. 204 (1807). 

 N^alagnensis, Paglia in Att. Soc. Ital. Sci. Nat. s. (1867) 399, non Poll. ; Mase, /. c. xi. (18G8) 0(58. 

 .V. dichotoma, Roxb. Hort. Eeng. 71 (1814) (nomeu), et FJ. lud. iii. 749 (1832). 



N.fragilis, Delile in Descr. Egypte, Hist. Nat. ii. 175 (1813) ; Rostk. & Schmidt, ¥\. Sedin. 382 (1824). 

 N.heteromorpha, Griff, ex Voigt, Hort. Suburb. Calcutt. 091 (1815) (nomen). 

 iV. marina, Linn, Fl, Suec. [ed. 2] 345 (1755) (in part, namely synonym from Micheli). 

 nJ subulata, Thuill. Fl. Paris [ed. 2] 510 (1799). 

 N.ternata, Roxb. ex Griff. Not. iii. 183 (1851) ct Ic. PL Asiat. t. 252 (1851), may belong- to this 



species. 

 Caulinia fragilis, Willd. in Mem. Acad. Roy. Sci. Berl. 1798, 88, t. 1. fig. 2, et Sp. PI. iv. 182 (1805) ; 



Poir. III. Gen. iii. 396, t. 799. fig. 2 (1833) ; Amici in Mem. Matem. c Fis. Soc. Ital. Sci. Modena, 



xix. (1823) (Fisica) 235, t. 8; T. Nees, Gen. PI. Fl. Germ. iii. t. 45, figs. 1-11 (1858); Nocca 



& Balb. Fl. Ticin. ii. 103 (1821); Parlat. Fl, Ital. iii. 664 (1858). 

 C. gracilis, Pouzolz, Fl. du Gard, ii. 135 (1862) non Willd. 

 Cj, indica, "Wall, List, no. 5183. 

 (7. minor, Coss, & Germ. Fl. Paris, 575 (1845). 

 Fluvialis minor, Pers. Syn. ii. 530 (1807) . 

 Itinera minor, C. C. Gmel. Fl. Bad. iii. 592, t. iv. (1808). 



Fluvialis Pisana,foliis denticulatis, J. Bauliin^ Hist. iii. 779 (left-hand fig.) (1651). 

 Fluvialis minor, foliis angustissimis, denticulatis, deorsum refiexis, fructu acuto, tenuiori, nionospermo, 



Micheli, Nov. PI, Gen. 11, t. 8. fig. 3 (1729) (syn. exclus.). 



There seerns some confusion as to the plant described and figured as Caulinia intermedia, 

 Nocca & Balb. PL Ticin. ii. 163, t. 15. The authors state that it is the C. alagnemisy 

 Poll., i. e. N. graminea, and the description of the marginal teeth as very minute, often 

 visible only by help of a lens, points to this species, and the " vai^iimla utrinque uniden- 

 tata " may refer to the characteristic auricles. I liave adopted this view. Cesati (Comp. 

 Fl. Ital. 204), however, makes it synonymous witli his ^Y. minor var. intermedia and 

 N. alagnensis, Mase ; while Magnus, in his account of the Italian species of Najas (hi 

 Nuov. Giorn. Ital. ii. 188) cites it with similar synonymy as N. minor forma intermedia 

 (Balbis), " folia valde elongata, erectiuscula ; planta robustior. Talis occurrit in aquis 

 profimdioribus." Schumann also refers to it (in Mart. EL Bras. iii. pi. 3, 726, footnote) 

 as belonging to N. minor. 



A plant from Padua (Zuccarini), with leaves reaching 2*5 cm. long and -75 mm. broad, 

 represents, 1 think, this form, to which N. alagnensis of Paglia and of Mase probably 

 refers. 



Monoica, fragilis, valde ramosa, internodiis brevibus vel plus minus elongatis, inermibus ; 

 foliis e vagina lata linearibus, superne angustatis, falcate recurvatis, margine cum 

 dentibus patentibus e basi lata spiniferis, laminae latitudinem rarius a^quantibus, 

 instructa, foliis in plantis laxioribus subflaccidis plus minus elongatis nee recurvatis ; 

 vaginis truncate rotundatis, siepe asymmetricis, cum dentibus subprominentibus 

 superne marginatis, rarius plus minus auriculatis ; squamulis intravaginalibus 

 angusto-linearibus vel lineari-subulatis obtusis;y/o^v7'^^s> solitariis, masculis sessilibus, 

 spatha ellipsoidea, in coUum breviter cylindraceum sub ore spinuliferuui desinente, 

 perianthio apice bilabiate, ad antheram unilocularem arete applicito ; flore femineo 

 achlamydeo, ovario ellipsoideo, stylo longo cyhndrico, apice in stigmata bina diviso 



SECOND SERIES. — BOTANY, VOL. V. 3 B 



