LXXIX. CERATOPHYLLACE^. 



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middle. Styles 2, subulate. Stigmas punctiform. Fruit 4- 

 celled, 4-lobed ; the lobes 1 -seeded, indehiscent, laterally com- 

 pressed, cohering at the axis, otherwise free. Seeds attached 

 by the middle. Embryo in the axis of fleshy albumen ; radicle 

 superior, long; cotyledons short, semiterete. — Small aquatic her- 

 baceous plants, with opposite^ simple^ entire leaves. 



1. Callitriche Linn. Water Star wort. 



Char, that of the Order. — N"ame : KaXoc^ beautiful and S-pt?, 

 rptx^c, hair; its stems being long and slender, and resembling 



hairs. 



1. C. verna L. (vernal TF.) ; fructiferous peduncles very short 

 with 2 falcate bracteas at their base, fruit regularly tetragonal, 

 each lobe keeled or slightly winged at the back. — a. lobes of 

 the fruit bluntly keeled. C. aquatica E. B. t. 722. — j3. lobes 

 of the fruit slightly winged at the back. C. platycarpa Kutz. : 

 E.B.S.t286^. 



Ditches, pools, and slow streams, abundant. 0. 4 — 9. — This 

 varies much, as do almost all aquatic plants, in its foliage. Upper 

 and floating leaves generally oval and stalked, 2-ribbed ; lower ones 

 single-ribbed, linear; rarely all linear. Our var, a, is said to have 

 the sfj/les constantly erect, var /3. to have them reflexed when in fruit; 

 but in the former we find them to be usually as much reflexed as in 

 the other. 



2. C. pedunciddta DC. (pedunculated W.) ; fructiferous pe- 

 duncles without bracteas at the base, fruit regularly tetragonal, 

 each lobe bluntly keeled at the back. C. autumnalis Hook, in 

 E. B. S. t. 2606. (excL the si/n.). 



Ditches in Jersey, Sussex, Shropshire, Wales, &c. 

 Fruit sometimes ahnost sessile. 



3. C autumnalis L. (autumnal W.) ; fructiferous peduncles 

 very short without bracteas at the base, fruit irregularly tetra- 

 gonal, each lobe broadly and acutely winged at the back. 



E. B. S. t. 2732. C. aquatica y. E. B. t. 722 (the small 

 figure). 



Ditches and lakes. Near London. Anglesea. Loch of Clunj% 

 Perthsbire ; Lochs near Forfar : Loch of Drum, Kincardineshire ; 

 Scotland. ©. 6—10. 



©. 6—9. 



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Ord. LXXIX. CERATOPHYLLACEiE Gray. 



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Flowers imperfect, monoecious. Perianth {involucre?) single, 

 *'*^^' 10— 12-cleft. — Sarrejz /. Anthers 12— 20, sessile, 2- 

 celled, 2— 3-cuspidate. — Fertile fl. Ovary superior, solitary, 



