1 40 DROSERA CEJE. [D uos i : i : A . 



Bigs and moist heaths, from Inverness southwards ; local in Scotland ; W. 

 of Ireland chiefly; fl. July- Aug. Stem short, leafy. Leaves gradually 

 contracted into the petiole, together 1-2 in. Scapes 2-4 in., curved at the 

 base. Flowers much as in 1). rotuiuli folia, usually 5-8-merous. ('"//>"/ 

 pyriform, equalling the sepals. Seeds ovoid. DISTRIB. Europe (Arctic), 

 W. Asia, E. America from Canada to Brazil. 

 3. D. ang'lica, Hudson; leaves suberect linear-spathulate, petioles 



glabrous, testa loosely reticulate. D. longifolia, L. in part. 



Wet moors, ascending to 1,700 ft. in the Highlands ; rare in S. England and in 

 Ireland ; fl. July-Aug. Very similar to D. intermedia, but larger. Leaves 

 in. broad ; petioles 2-4 in. Scapes 4-8 in. Flowers \ in. diam., 5-8- 

 inerous. Capsule, obovoid, longer than the sepals. DISTRIB. Europe, 

 Siberia to Kamtschatka, E. and W. America. D. otova'ta, Mert. and, Koch, 

 with broader leaves, styles often notched, capsule half as long as the sepals, 

 seeds imperfect, is probably a hybrid between this and D. rotundtfoUa. 

 Scotch moors. 



ORDER XXXI. HALORA'GEJE. 



Herbs or shrubs, often marsh or aquatic, with much-reduced or imper- 

 fect perianths. Leaves opposite alternate or whorled, exslipnlate. Flowers 

 often minute and 1 -sexual. Calyx superior; lobes 2, 4, or 0, valvate or 

 slightly imbricate in bud. Stamens 1-8, epigynous in the 2-scxual 

 flowers, filaments usually short ; anthers (except in Callitriche) long, 

 4-angled, basitixed and bursting laterally. Disk small or 0. Ovary inferior, 

 mostly of 2-4 connate (rarely of 1) carpels; styles or stigmas as many 

 as the carpels, except in Callitriche ; ovules 1 in each cell, pendulous, ana- 

 tropous. Fruit 2-4-celled, dry and indehiscent, or of 1-4 small l-smlcM 

 drupes. Seed pendulous, testa membranous, albumen fleshy ; embryo 

 rylimlric, axile, or minute in the base of the albumen. DISTRIB. Widely 

 dispersed ; genera 9 ; species 80. AFFINITIES. Usually placed near 

 Onagrariece, but differing in the valvate petals, solitary pendulous 

 ovule, separate styles, fleshy albumen, and embryo, and 1 think much 

 nearer Saxifragcce and Rhizophorcce. PROPERTIES unimportant. 



Leaves all whorled, entire. Stamen and style 1 1 . Hippuris. 



Leaves all or lower whorled, much cut. Stamsns 4 or 8.... 2. Myriophyllum. 



Leaves all opposite, quite entire. Stamen 1 3. Callitriche. 



1. HIPPU RIS, L. MARE'S-TAIL. 



Glabrous, aquatic herbs. Stems stout, erect, simple, leafy. Leaves 

 whorled, narrow, quite entire. Flowers minute, solitary, axillary, some- 

 times 1-scxual. Calyx-tube subglobose, limb entire. Petals 0. SV<o//o/ 

 1 ; anther basifixed. Ovary 1-celled, style 1, subulate, stigmatise 

 throughout its length. Drupe ovoid, stone crustaceous. Seed oblong, 

 albumen scanty. DISTRIB. Arctic and temp. N. hemisphere, Chili and 

 Fuegia ; species 1 or 2. ETYM. frnros and ovpit, horse-tail. 



1. H. vnlga'ris, L. ; leaves 6-10 in a whorl linear acute. 

 Margins of lakes, ponds, &c.; local ; fl. June-July. RooMocl submerged, 

 stout, creeping. Stem* 6-24 in., terete, very many-jointed, as thick as a 



