DROSEFU. XVIII. DROSERACE^E. 179 



1 2f high, simple, and, with the leaves, somewhat hairy. Leaves 46' by 

 1 j 2J', lanceolate, acuminate, subentire, tapering to short petioles. Peduncles 

 very short, 1 5-flowered, axillary. Flowers small, greenish white. Calyx 

 about as long as the corolla. Lower petal twice larger than the others. Cap- 

 sule nearly I' in length. Apr. May. 



ORDER XVIII. DEOSERACE^E. SUNDEWS. 



Plants herbaceous, delicate, often covered with glands. 



Lvs. alternate, with stipulary fringes, circinate in vernation. _ 



Fed. when young, circinate. Sep. 5, persistent, equal, imbricate in aestivation. 



Cor. Petals 5, hypogynous, marescent. 



Sta. distinct, marescent usually equal in number to the petals. 



Ova. single. Sty. 35, either wholly distinct or slightly united, bind or branched. 



Fr. a capsule, i 3-celled, usually many-seeded. Sds. sometimes ariled. 



Genera 7, species 90, scattered over the whole globe, wherever marshes are found. Their leaves are 

 usually furnished with glandular hairs, and are entire, alternate or crowded. Attached to this order is 

 the genus Parnassia, regarded by some as forming a separate order. It is variously located by different 

 botanists. We follow Torrey and Gray, after De Candolle, in placing it here. Some peculiarity exists 

 in the arrangement and structure of the stamens in this genus, which will be mentioned farther on. 



No remarkable properties have been discovered belonging to plants of this order. 

 Conspectus of tli/e Genera. 



( 5 in number. Styles 35 Drosera. I 



$ hypogynous, all perfect and (. 1015 in number. Style 1 Dioneza. 2 



Stamens { perigynous, inner row 5 perfect ones, outer row 5 groups of imperfect ones. . Parnassia. 3 



1. DROSfiRA. 



Gr, fyoaos, dew; from the dew-like secretion. 



Sepals 5, united at base, persistent ; petals 5 ; stamens 5, with ad- 

 nate anthers ; styles 3 5, each 2-parted ; capsule 3 5-valved, 1- 

 celled, many-seeded. Small aquatic herbs. 



1. D. ROTUNDIFOLIA. Round-leaved Sundew. 



Lvs. radical, nearly round, depressed ; petioles hairy ; scapes erect, bear- 

 ing a simple raceme. ( i|_ This curious little plant is not uncommon in bogs 

 and muddy shores of ponds and rivers. It is at once distinguished by the red- 

 dish glandular hairs with which the leaves are beset, and which are usually 

 tipped with a small drop of a clammy fluid, appearing like dew glistening in 

 the sun. Leaves small, lying flat on the ground, narrowed into the elongated 

 petiole. Scape 5 8' high, at first coiled inward. Flowers arranged on one 

 side, very small, white. Aug. 



2. LONGIFOLIA. Long-leaved Sundew. 



Lvs. radical, spatulate and obovate, tapering at base into a long, smooth 

 petiole ; scape bearing a simple raceme. Tj. A more slender and delicate spe- 

 cies, in similar situations with the last. Leaves slender, ascending, cuneiform, 

 oblong, crenate, beset with numerous hairs tipped with dew-like drops, length 

 including the petiole 1 3'. Scape ascending at base, bearing a cluster of 

 small, yellowish-white flowers, and arising 3 8'. Jn. Aug. 



3. D. FILIFORMIS. Thread-leaved Sundew. 



Lvs. filiform, very long ; scape nearly simple, longer than the leaves, 

 many-flowered ; pet. obovate, erosely denticulate, longer than the glandular 

 calyx ; sty. 2-parted to the base. 7J. Grows in wet sandy places, much larger 

 than the preceding species. The leaves are destitute of a lamina, are suberect, 

 nearly as long as the scape, beset with glandular hairs except near the base. 

 Scape about a foot high, with large, purple flowers. Aug. Sept. 



4. D. LINEARIS. Goldie. Linear-leaved Sundew. 



Lvs. linear, obtuse ; petioles elongated, naked, erect ; scapes few-flowered, 

 about the length of the leaves ; col. glabrous, much shorter than the oval cap- 

 sule ; sds. oval, shining, smooth. (I) Borders of lakes, Can., Mich, to the Rocky 

 Mts. Hooker. T. fy G. Scape 3 6' high, with about 3 small flowers. Leaves 

 about 2" wide, clothed with glandular hairs, which are wanting on the petiole. 

 Jl. Aug. 



16 



