390 DR. A. B. RENDLE— SYSTEMATIC 



Najas monosperma.WiW^. Sp. PI. iv. 331 (1805) ; Pers. Syn. ii. 551 (1807) ; Sturm, Deutschlands Flora, 



Heft41, no. 15 (1821). 

 N. muricata, Thuill. Fl. Paris [ed. 2] 509 (1799). 

 N. spinosa, Buch.-IIam. ex Wall. List, no. 5182. 

 N. polonica, Zalewski in Kosmos, xxi. (189G) 326. 



N.pluvialis, K. Sclmm.in Mart. Fl. Bras. iii. pt. 3, 724 (1894), splialm. ^fluviaiilis, Lam. 

 N. tetrasperma, Willd. Sp. PI. iv. 331 (1805); Pers. Syn. ii. 551 (1807). 

 Itinera Najas, C. C. Gmel. Fl. Bad. iii, 590, t. 3 (1808). 

 /. major, Reichb. Fl. Germ. Exeurs. 150 (1830). 

 Fluvialis Pisana, foliis denticulaiis, J. Bauhin, Hist. iii. 779 (right-hand fig.) (1651) ; Tourn. Hist. 



196 (1698) ; VailJant, Botan. Paris, 54 (1727). 

 Fluvialis species angusto brevique folio undequaque spinis infesta (Flagellum Christi), Cupani, Hort. 



Cath. 241 (1696) ; Ray, Hist. iii. 132 (1706). 

 Fluvialis species folio angusto, ad margines denticulis spinosis inciso, Flagellum Christi dicta, Ray, 



/. C.121. 

 Fluvialis vulgaris latifoUa, A^aillant in Mem. Acad. Roy. Sci. Ann. 1719, 13, t. 1, fig. 2. Male and 

 female flowers are shown on the same plant ; the former hanging from a leaf-sheath at the end of a 

 stalk equal in length to the anther. The ovaries bear two stigmas. 

 Fluvialis angusto longoque folio, Vaillant, /. c. 14. 

 Fluvialis angusto brevique folio, Vaillant, /. c. 

 Fluvialis folliis angustis, dentatis, Vaillant, Bot, Paris, 54 (1727). 



Fluvialis latifolia,fructu obtuso tetraspermo, Micheli, Nov. Plant. Gen. 11, t. 8, fig. 1 (1729), and 

 Fluvialis latifolia, fructu minus ohtuso monospermo, ib. fig. 2. In both figures Micheli represents the 

 plant as monoecious, with long-stalked male flowers. He rightly figures several fruits, but confuses 

 fruit and seed with anther when he describes what is evidently a transverse section of an anther 

 (fig. G) as a fruit Avith four loculi, and the four pollen-sacs (fig. H) as four seeds. 

 Potamogeiton fluviale Sargazo simile lucens, foliis margine dentatis, Piuk. Almag. 304, t. 216, fig. 4 (1696). 

 Plukenet^s plant is in Herb. Sloan, (vol. xcvii. fol. 122), where it is labelled in Plukenet^s handwriting 

 " Fluvialis Pisana, J. B. Tab. 216, f. 4"; Ray, Hist. iii. 121 (1706). 

 Fucus jiuviatilis, aculeatus, undulatus, Tourn. Inst. Herb. i. 569 (1700) ; Mappus, Hist. PI. Alsat. 



113 (1742). 

 Najas fructu monospermo, Haller, Hist. Helvet. i. 238 (1768). 

 Sclerocarpus obliquus, C. A. Weber in Neu. Jahrb. f. Miner. Geol. u. Palaont. ii. 79 (1891). Specimen 



not seen; inserted on the authority of G. Andersson in Bot. Not. 1891, 253. 

 Dioica ; fragilis, late ramosa, internodiis sgepe elongatis, interdum inermibus, interdum 

 spinis paucis vel subnnmerosis armatis ; foliis in vivo rigidis, patentibus linearibus, 

 saepe late-linearibus, interdum oblongo-linearibus, super vaginam plus minus angus- 

 tatis, apice mucronatis, margine dentibus validis patentibus spiniferis armatis, dorso 

 saepe parce spinosis; raginis late rotundatis, inermibus, vel seepe dente singulo 

 vel dentibus paucis utrinque instructis ; squamulis intravaginalibus minutis, sgepius 

 subovatis, apice obliquis vel plus minus oblique truncatis ; floribus solitariis : 

 plantis masculis interdum cum foliis quam in femineis angustioribus, fiore masculo 

 cum spatba in collum apice paucispiniferum desinente circumdato, periantliio 

 bilabiato ad antberam quadrilocularem subsessilem arete applicito ; flore femineo 

 aclilamydeo, ovario subgloboso vel late ellipsoideo, stylo cylindrico in stigmata 

 linearia tria, rarius duo, diviso ; fructu ellipsoideo vel ovoideo, apice subacuto, 

 pericarpio crassiusculo ; seniine ad pericarpium conformante, testa rugulosa dura 

 areolis plurangulis notata. 



