410 BE. A. B. EENDLE— SYSTEMATIC 



Insufficiently known, but apparently near Najas WrigUiana, to which, I think, 

 belong some of the specimens assigned to N. conferta by Schumann. It is distinguished 

 by its narrower, shorter leaves, wdth larger, fewer, and less symmetrical teeth, and longer 

 narrow fruit. 



14. Najas aeguta, H. B. K. (PI. XL. figs. 103, 104.) 



N. arguta, H. B. K. Nov. Gen. & Sp. PL i. 371 (1815) ; Kuiith,Eiium. iii. 113 (1841) : A. Br. in Journ. 

 - Bot. ii. (1864) 277; Magnus, Beitr. p. vi, &c. t. 3. figs. 19-22; K. Schura. in Mart. Fl. Bras. iii. 

 pt. 3, 729 (1894). 

 Var. tenera, A. Br. I. c. 

 N. tenera, Schrad. in Gott. Gelehrfc. Anzeig. ii. (1821) 715. 

 Caulinia teneUa, C. G. Nees in Neuwied, Eeise Bras. ii. 345 (1824). 



" Laete viridis," caulibus gracilibus, ssepe filiformibus, dichotome et diffuse ramosis, 



ramulis ultimis plumosis condensatis ; foliis latiuscule linearibus obtusis vel obtusi- 



usculis laxiter recurvatis, lamina juxta nervum medianum conspicue tessellata plana, 



margine cum denticulis frequentibus sat conspicuis regulariter munito ; vagina late 



rotundata prominule et regulariter denticulata; squamulis intravaginalibus angnste 



linearibus, subacutis ; floribus masculis cum spatha ellipsoidea sub apice in collum 



breve ore spinif erum desinente ; anthera quadriloculari ; ovario nudo lagenif ormi 



superne in stigmata bina et processus 2-3 aculeiferos desinente; '' semine elongato- 



iusiformi, pro rata tenui, utrinque acuminato, seriebus arearum elongatarum plurimis 



exsculpto." 



Apparently a small plant, with a much branched, densely dichotomous plumose habit. 



Leaves about 2 cm. long by 1'25 to 1'5 mm. broad ; margin shallowly dentate, teeth 



patent, about 20 each side, ^ to ^ the leaf-width, consisting of a several-celled triangular 



outgrowth ending in a spine-cell. Sheath 4-5 mm. long, by 4 mm. broad w^hen opened 



out, the broad sloping shoulders shallowly denticulate, the teeth (about 10) becoming 



smaller down the sides, along which they run for about halfway to the base. Intrava- 



ginal scales about '6 mm. long. Male floioer about 1-75 mm. long, the short neck about 



^ the length of the whole. Ovary ending irregularly in a pair of stigmas and 2 to o 



spine-arms. Seed not seen, but according to K. Schumann (in Mart. PI. Bras. /. c.) 



2'5 mm. long, by only "5 mm. in diameter, yellowish. 



Tropical South America— New Granada, " prope Mompot" [H. JB. K. I. c.) ; La 

 Paila (Holton, no. 240) ; Brazil {Spruce, no. 1622) ; Ilhios {Martins) ; Colombia 

 {Lobb). 



§ 3. Euvaginatce. 

 15. Najas minor. All. (PI. XLL figs. 105-115.) 

 N^minor, All. Fl. Pedem. ii. 221 (1785) ; Cham, in Linnjea, iv. (1829) 500; Kunth, Enum. iii. 113 



(1841) ; A. Br. in Journ. Bot. ii. (1864) 277 ; Roth, Tent. FI. Germ. ii. pt. 2, 500 (1793) (the species is 



often quoted as of Roth) ; T. Nees, Gen. PI. Fl. Germ. iii. t. 44, figs. 22-24 (1858) ; Peterm. Deutschl. 



Fl. 539, t. 83. fig. C58 m (1849) ; Schkuhr, Bot. Ilandb. iii. 252, t. 296 (1808) ; Garcke, Fl. Nord u. 



Mitt, Deutschl. 300 (1849), & Illustr. Fl. Deutschl. 566 (1895) ; Pollini, Fl. Veron. iii. 48 (1824) ; 



Bertolini, Fl. Ital. x. 296 (18.54) ; Magnus in Nuov. Giorn. Bot. Ital. ii. (1870) 188; Boiss. Fl. 



Or. V. 28 (1884); Hook. f. Fl. Brit, Ind. vi. 569 (1893) ; Franch. & Savat. Enum. PI. Jap. ii. 13 



(1879). 



