420 DB. A. B. RENDLE — SYSTEMATIC 



Australia— Cavera Is., Gulf of Carpentaria {E. Brown, 1803); Richmond, New 

 South Wales [Caley, 1803 & 1804); Nepean Kiver (Woolls); Port Mackay, 

 Queensland [Tyson). 



25. Najas Browniana, sp. nor. (PI. XLII. figs. 163-167.) 



*' Herba aquatica graveolens odore Charce vulgaris " * ; caulibus debilibus ramosis, 



internodiis filiformibus ; foliis tenuissimis, margine saepe involuto denticulis minutis 



distantibus instructo ; vagina anguste cylindrica, breviter et late auriculata, auriculis 



obtusis subproniinenter paucispinosis ; squamulis intravaginalibus subulatis ; 



florihvs in ramulis brevibus aggregatis, niasculis breviter pedicellatis solitariis, spatha 



suboblonga in coUum breve cum ore obliquo spinifero desinente, ovario nudo ; stylo 



superne attenuato in stigmata longa duo diviso ; semine ellipsoideo, testa in areolis 



quadrilateralibus numerosis subirregulariter lineata. 



Shoots 15 cm. long, copiously branching ; internodes 1 cm. long or less. Leaves 



1*5 to 2 cm. long by one-sixth of a millimetre or less in breadth, very weak, filiform, 



often with incurved margins for the greater part of their length; margins wdth 10 to 15 



slightly projecting subascending spines, often broken off or absent, except in the upper 



part ; apex ending in a sharp spine. Sheaths 1'6 mm. long. Intravaginal scales about 



'5 mm. long. Young leaves very delicate, transparent and flat. 



Floicers : several crowded together on short lateral shoots ; male flowers few, apparently 

 solitary near the top of the shoot, 12 mm. long ; spatlie Avith a short cylindrical neck 

 with an irregular spinuliferous mouth ; anther enclosed in the perianth, shortly stalked, 

 ellipsoidal-oblong ; female flowers : several close together at successive nodes, about 

 1-75 mm. long, consisting of a short ellipsoidal ovary passing into a tapering style ; 

 stigmas subequal or sometimes unequal. Frtiit -with a thin pericarp crowned with the 

 withered style, and conforming closely to the ellipsoidal seed. Seed 1*5 mm. long by 

 ■4 to '5 mm. in diameter ; raphe prominent ; testa with about 25 rows of somewhat 

 irregular four-sided areolae, rather longer than broad in the middle of the seed. The 

 areolae are larger and more irregular tlian in K tenuifolia, and the seed is smaller 

 and proportionately broader. 



:N'orth Australia — Cavern Is., Gulf of Carpentaria [li. J3rown, Jan. li, 1803). 



26. Kajas Leichhardtii, Magnus. (PI. XLII. figs. 168-171.) 

 N. Leichhardtii, Magnus, Beitr. 46, t. viii. figs. 1-8 (1870). 



Foliis in parte inferiore crassiusculis superne, planis, flexuosis, margine cum dentibus 

 prominentibus instructa ; vagina angusta valde auriculata ; squamulis intravaginali- 

 bus subulatis ; florihus solitariis, mascuKs cum spatha ellipsoidea in collum longum 

 ore spinosura desinente, anthera quadriloculari ; ovario undo, anguste ovali, stylo 



in stigmata duo diviso; fruotu 



A fragment consisting of a shoot 12 cm. long, with a few short branches ; internodes 

 diminishing from 3-5 cm. to 7 cm., -5 mm. in width. Leaves I'S to 25 cm. long by '2 



* R. Brown, MS. iu Herb. Mus. Brit. 



