1706 CXLVIII. NAIADEiE. [TrifflocJdn, 



1. T. Striata (channelled), Ruiz, et Par. Fl. Per. et Chil. iii. 72 ; Bent/i. FL ■ 

 Aiistr. vii. 166. Eootstock small, stoloniferous. Leaves from narrow-linear and 

 about 1 line broad to almost filiform, very variable in length but almost always 

 shorter than the scape. Scape from 2 or 3in. to nearly 1ft. high, flowering 

 from below the middle. Flowers shortly pedicellate, often very numerous. 

 Outer perianth-segments broadly ovate, about f line long, the inner ones smaller 

 and narrower or almost wanting. Perfect anthers 3 at the base of the outer 

 segments, those at the base of the inner segments fleshy and without pollen or 

 deficient and some flowers occasionally without any anthers. Fruits orbicular or 

 nearly so, 1 to IJ line long, with 6 prominent angles or ribs, 3 larger ones being 

 perfect carpels, laterally compressed with 1 or 3 dorsal ribs and falling off at 

 maturity, leaving 3 thin empty carpels united to the central axis and having then 

 the appearance of the dissepiments of a 3-celled 6agsnle,r-F. v. M. Fragm. vi. 

 88 ; T. dccipiem, E. Br. Prod. 348 ; T. /ilifolium, Sieb. in Spreng. Syst. Cur. 

 Post. 142, also of Hook. Ic. PI. t. 579 ; T. triandrwn, Mich. Fl. Bor. Amer. i.. 

 208, Hook. f. Fl. Tasm. ii. 40 ; T. montendcnse, Spreng. Syst. ii. 145, Seub. in 

 Mart. Fl. Bras. iii. part i. t. 12. 



Hab.: Moreton Island, M'Gillivray; Brisbane Eiver, F. v. Mueller. 



The larger speoimenB with 3 prominent staminodia have usually broader leaves than the 

 others. — lienth. 



The species is widely spread over extratropical South America and is also in North America 

 and in New Zealand. 



2. T. centrocarpa (fruit spurred). Hook. Ic. Fl. t. 728 ; Benth. Fl. Austr. 

 vii. 167. A dwarf slender plant usually densely tufted. Badical leaves subulate, 

 often all under Jin. rarely rather above lin. long. Scapes usually 1 to 2in. long,, 

 or in luxuriant specimens twice as much, very slender, bearing fruits from below 

 the middle. Flowers minute, in a short dense inconspicuous spike, which soon 

 elongates so as to occupy half the scape. Perianth-segments from broadly ovate- 

 acute to lanceolate and acuminate, J to j line long, from scarcely exceeding to- 

 twice as long as the anthers, the lower flowers often with only 1 anther-bearing 

 segment and 2 lateral empty ones, the others with 3 or rarely 6 segments, all 

 anther-bearing, but the majority of the numerous specimens seen were in fruit 

 with the perianth and stamens fallen away. Fruit linear, usually about 2 lines 

 but varying from 1 to 8 lines long, with 3 perfect cells, ti'unciitie at the top and 

 obtuse or more or less 3-toothed with the 3 stigmas, each perfect carpel 3-ribbed 

 on the back, the lateral ribs with either a prominent angle or a tooth or spur at 

 the base, the 3 barren carpels sometimes as thin as in T. striata, sometimes as 

 thick as the perfect ones but solid inside, and in some small specimens only one 

 seed ripens in the whole fruit.— Hook, f . Fl. Tasm. ii. 40 ; Endl. in PI. Preiss. 

 ii. 54 ; T. namim, F. v. M. in Trans. Vict. Inst. 1855, 135, and in Hook. Kew. 

 Journ. viii. 832, Fragm. vi. 82. 



Hab.: Queensland, F. v. Mueller. 



The fruits in this species are exceedingly variable in size and position. In the rare form; 



ine to 2 lines long. — 



,, . „ exaggerated idea of 



the spur even of the single specimen drawn.— Bentft. 

 Hab. : Queensland, F. v. M. 



8. T. procera (tall), 7?. Br. Prod. 348; Benth. Fl. Austr. vii. 168. 

 "Wanna," Oape Bedford, "Anamum," Musgrave Eiver; Both. Eoot-fibres 

 swollen into ovoid or oblong tubers. Leaves from a terete base; linear, flat, i to 

 above |in. broad, often several feet long when grown in deep water, the upper- 

 portion floating on the surface. Scapes 1 to several feet high, the terminal spike 

 from 2 or 3in. to above 1ft. long. Flowers very numerous, nearly sessile. 

 Perianth-segments 6 or rarely fewer, orbicular and H to 2 lines diameter or 

 narrower and not longer than the anthers. Carpels 6 or rarely fewer, united' to 



