MONCEC. TRIAND. 259 



. 2. CALLITRICHE. 



2. C. aquatica (Water Slartvort) . Ligfitf. p. 70 (C. verna and 

 C. autunmalis). E. B. t. 722. 



HAB. Ditches, pools, and slow streams, abundant. Fl. Apr. Oct. 

 G r 



Stem filiform, branched, varying much in length according to the 

 depth of the water,, and almost equally so in the form of the leaves. 

 Generally the superior leaves, which float on the surface, are spa- 

 thulate and crowded j the lower linear, all opposite. From the ax- 

 ils of the upper ones appear the, mostly,, monoecious Jlowers. Peri- 

 anth single, of 2, lanceolate, concavo-carinate, incurved, white, 

 membranous leaflets. Sterile Jl.. with only one long filament, ter- 

 minated by a nearly spherical, yellow anther, opening vertically. 

 Fertile Ji. with a small germen, terminated by two, long, curved 

 styles. 



3. ZOSTERA. 



3. Z. marina (common Grass-wrack), leaves entire somewhat 3- 

 nerved, stem roundish. Liglitj. p. 530. E. B. t. 467. PLok. 

 i?i Fl. Lond. with ajlgure. 



HAB. Marine ditches, and thrown up by the tide on the sea-shore, 

 common. Fl. Aug. (Light/.). (Apr. and May in England.) 7/ . 



Stems very various in length, as are the long linear, obtuse, more or 

 less faintly 3 -nerved leaves, which have long sheathing bases. Spa- 

 diT linear, arising from a sheathing portion of the leaf, which thus 

 forms the spatha. Flowers all on one side of the spadix, quite de- 

 stitute of perianth, in two rows. Pistils and anthers alternate, gene- 

 rally two anthers and then 1 pistil; both ovate, or oblongo-ovate, 

 the former tipped with a bipartite, long, filiform style. Both are 

 green. Anthers bursting irregularly. Used in some northern parts 

 ef Europe for bedding, and said to be excellent for packing glass- 

 bottles and other brittle ware. 



2. TRIANDRIA. 



4. TYPHA. 



1. T. lutifolia (great Cat's-tail or Reed-Mace), leaves linear 

 nearly plane, sterile and fertile catkins close together. Lightf. 

 p. 588. E. B.I. 1455. 



HAB. Borders of ponds and lakes in several places. Loch-end, near 

 Edinb. Bog on the banks of the Clyde 2 m. from Hamilton, Hopk. 

 Fl. July. I} . 



Culnut 3* -6 f. high. Leaves very long, sometimes an inch broad. Cat- 

 kins very long, close together ; fertile one greenish brown j sterile 

 ones yellow with 1 or 2 largish membranous bracteas. 



2. T. angiistijolia (lesser Cat's-tait or Reed-Mace,) leaves li- 

 near convex below, sterile and fertile catkins a little distant 

 from each other. E. B. t. 1456. 



HAB. Loch of Lindore, Fifcshire, abundantly, D, Don. Fl. July. I/ , 



s 2 



