172 . THE SUNDEW FAMILY. [Drosera. 



1. D. rotundifolia, Linn. (fig. 392). Common S. Rootstock short 

 and slender, the leaves on long stalks, nearly orbicular, 3 to near 6 lines 

 in diameter, covered on the upper surface with long, red, viscid hairs, 

 each bearing a small gland at the top. Flower-stems slender, erect, 

 and glabrous, 2 or 3 to 5 or 6 inches high, the upper portion, consisting 

 of a simple or once-forked unilateral raceme, rolled back when young, 

 but straightened as the flowers expand. Pedicels nearly a line long, 

 without bracts. Calyx near 2 lines. Petals white, rather long, ex- 

 panding in sunshine. Seeds spindle-shaped, pointed at both ends, the 

 loose testa several times longer-than the small, ovoid albumen. 



In bogs, and wet, heathy ground, throughout central and northern 

 Europe and Russian Asia ; from northern Spain to the Arctic regions. 

 Abundant in all parts of Britain where there are considerable bogs. Fl. 

 summer and early autumn. 



2. D. longifolia, Linn. (fig. 393). OUongS. Distinguished from D. 

 rotundifolia by the leaves much more erect, not half so broad as long, 

 and gradually tapering into the footstalk ; the flowering stem is also 

 usually shorter, and not so slender ; the styles less deeply divided, and 

 the seeds are ovoid or oblong ; the testa either close to the albumen, and 

 taking its form, or very slightly prolonged at each end. D. intermedia, 

 Hayne. 



In bogs, with D. rotundifolia, but much less generally distributed both 

 on the continent of Europe and in Britain. Fl. summer and early 

 autumn. 



3. D. anglica, Huds. (fig. 394). English S. Very like D. longifolia, 

 but the leaves are still longer and narrower, often an inch long, without 

 the stalk, the flowers and capsule larger, and the testa of the seed is loose 

 and elongated, as in D. rotundifolia, but more" obtuse at the ends. 



In bogs, apparently spread over the same geographical range as the 

 two other species, but rarer. It is often confounded with D. longifolia. 

 In Britain, more frequent in Scotland and Ireland than in England. 

 FL summer and early autumn. 



XXXIV. HALORAGE^. THE MARESTAIL FAMILY. 



Aquatic herbs, or, in some exotic genera, terrestrial herbs or 

 undershrubs. Flowers very small, often unisexual, or incom- 

 plete, axillary or in terminal racemes or panicles. Calyx-tube 

 adnate to the ovary, the limb of 4 or 2 lobes or quite incon- 

 spicuous. Petals 4, 2 or none. Stamens 8 or fewer. Ovary 

 inferior, 2- or 4-celled, with 1 pendulous ovule in each cell, or 

 rarely reduced to a single cell and ovule. Styles distinct, as 

 many as cells of the ovary, in the British genera reduced to 

 sessile stigmas. Fruit small, indehiscent; or divisible into 

 1-seeded nuts. Seeds without albumen. 



This Order is dispersed over nearly the whole globe. It was included 

 in the first edition of this work in Onagracece, as a very reduced type. It 

 differs, however, essentially in the perfectly distinct styles, and othef 

 gharacters, and is much nearer allied to the Saxifrage family. 



