EEVISION OF THE GENIJS NAJAS. 427 



rounded or bluntish auricles one-fiftli to one -sixth its length, bearing a few (5 to 7) spines, 

 especially on the outer edge. Intravaginal scales narrow linear, tapering, scarcely '5 mm 

 long. Male flower before elongation 6 mm. long; female 1 mm. long. iS'<?6'c? ellipsoidal- 

 oblong, 1*15 to 1*5 mm. long, plainly marked with 20 to 25 rows of areolae, which are 

 more or less quadrate about the middle, becoming 5- to 6-gonal and less regular towards 

 the ends. 



India— Bengal {Griffith, no. 5609/6). 



'hVKKKB.— {Griffith, no. 5609/1, in part) ; Pegu {Kurz, nos. 3192, 3310). 



Var. ANGTJSTiroLiA, var. nov. (PL XLII. fig. 202.) 



Planta debilis, foliis quam in specie angustioribus, apice subsetaceis, denticulis marginalibus 

 magis conspicuis ; fructu minore. 



Habit weak, effuse ; leaves (when dried) flexuose, generally 1'5 to 2 cm. long and 

 •2 to '3 mm. broad ; spines raised on slmllow triangular outgrowths of the margin, 

 forming teeth distinguishable by the naked eye, and on the narrower leaves reaching one- 

 fourth to one-third the leaf-Avidth. Seed scarcely exceeding 1 mm. long, closely 

 resembling that of var. 7iiinor, but smaller. 



Malaya — Singapore, Garden Lake {Ridley, no. 8916) ; Borneo, Bangarmassing 

 {Motley). 



The Bornean plant has rather shorter leaves (scarcely 1*5 cm. long) and somewhat more 

 prominently denticulate leaf-teeth than the specimen from Singapore, but the seeds 

 conform. 



Species dubice vel excludenda. 



Najas luicrophylla, Beichb- El. Germ. Excurs. 813 (1832) = C«?*^m«« mycrophylla, 

 ^ Nocca & Balb. 

 JS'aJas? ohmluta, Blanco, PL Pilip. [ed. 2] 460 (1815), ib. (Naves) gran. ed. iii. 60 



(1879). 

 " Caulis erectus, bipalmaris, ad digitum grossus, supra planus, infra rotundo-striatus. 



Polia alterna, alata, alte plurilobulata, lobulis subulatis rotundisque, aut potius 



convoluta, 5- vel pluri-secta. Plores monoici," &c. 

 In op. cit. (gran, ed.) Nov. App. 332 (1880) this is placed as a synonym of a fern, Cerato- 

 pteris thalictroides, Brongn. 



Najas p)aliistriSy Blanco, PL Pilip. 660 (1837) ; Kunth, Enum. iii. 590 (1811). 



N. lobata, Blanco, PL Pilip. [ed. 2] 459 (1845), ib. (Naves) gran. ed. iii. 65 (1879). The 

 description in PL Pilip. [ed. 2] 459 is word for word that of N. paliistris in the first 

 edition. The only change is in the specific name. 



•' Caulis rotundus, ramosus. Polia alterna, linearia, margine denticulata, basi obtuse 

 biauriculata, amiculis amplexicaulibus. Kamusculi axillares foliis alternis vere 

 aucti; ideoque folia semper alterna. Plores monoici, pauci, notabiles. Masculi 

 axillares, solitarii, involucello spatha^formi, monophyllo, lateraliter dehiscente 

 instruct!. Cal. involucellum superans, cylindricus, limbo in 2 labia ovata et 

 divergentia diviso. Stam. 1, filam. crasso. Anth. 1, calycis fauce brevier, 



SECOND SERIES. — BOTANY VOL. V. 3 T 



