N. ORD.—DROSERACE&, 29 
GENUS.—DROSERA,* LINN. 
SEX. SYST.—PENTANDRIA PENTAGYNIA. 
DROSERA. 
SUNDEW. 
SYN.—DROSERA ROTUNDIFOLIA, L.; RORELLA ROTUNDIFOLIA, AND 
ROS SOLIS FOL. ROTUND. RAIL. 
COM. NAMES.— ROUND-LEAVED SUNDEW, RED-ROT, MOOR GRASS, 
YOUTH ROOT; (FR. DROSERE A FEUILLES RONDES, ROSEE DU 
SOLEIL; (GER.) RUNDBLATTRIGER SONNENTHAU. 
A TINCTURE OF THE WHOLE FRESH PLANT, DROSERA ROTUNDIFOLIA, L. 
Description.—This low, stemless, perennial herb is characterized as follows: 
Leaves orbicular, tufted, the upper surface covered with red, glandular, setose 
hairs, each bearing a pellucid globule of glutinous fluid at its apex; fetioles long, 
hairy, and spreading ; stipules replaced by a fringy tuft of hairs. Scapes naked, 1 to 
3 from each root; inflorescence a terminal, unilateral, at first circinate then nodding 
raceme which becomes gradually erect as the buds expand and fruits ripen; thus 
each flower as it opens appears terminal. Yowers 5 to 10, white, diurnal, opening 
only in sunshine, the parts sometimes in sixes. Petals oblong, styles generally 3, 
deeply forked; stigmas 6, situated upon the inner face of the club shaped apex of 
each fork. od globular, 3-valved; seeds numerous, fusiform, arranged in 2 to 5 
rows along the placentiferous median line of each valve, ‘esta loose, arilliform 
and chaffy. 
Droseracez.—The members of this small family of bog plants are known 
mainly by their being mostly clothed with gland-bearing hairs. Leaves clustered 
at the base of the scape, or alternate, petiolate, circinate in the bud. /Yowers 
hypogynous ; calyx composed of 5 equal and persistent sepals; corolla of 5 equal 
and regular, marcescent petals, convolute in the bud. Stamens equaling in num- 
ber the petals and alternate with them; am¢hers innate, extrorse. Styles 3 to § gen- 
erally distinct, undivided, bifurcated or two-lobed, at the apex. Fruita 1-celled 
3 to 5-valved, loculicidal capsule ; p/acenta thick at the base of the pod, or merely a 
line on each valve; seeds numerous,’ anatropous ; a/bumen sarcous or cartilagi- 
nous ; emdryo basal, minute. : es 
The species under consideration is the only one used in medicine. The North 
Carolinian fly-trap (Dionea muscipula, Ellis) has furnished material for the study 
of carnivority in plants; the sundew has also been experimented upon in this 
* Apocep6s, droseros, dewy; in allusion to the appearance of the leaves. 
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