DROSERACEX. IV. Bysus. V. Rormura. VI. 
base. Petals 5, united into a 5-cleft deciduous corolla. Stamens 
5, inserted in the bottom of the tube of the corolla. Capsules 
2-valved, 2-celled, many-seeded. Perhaps this genus more 
properly belongs to Sazifragce. 
1 R. Unarascute’nsis (Cham. 1 c.) 
moist valleys in the island of Unalaschka. Herb with the habit 
of Saxifraga or Adéxa. Leaves stalked, roundish, reniform, 
deeply toothed. Flowers whitish, without bracteas, in terminal, 
few-flowered racemes. 
Unilaschka Romanzowia. PI. + foot. 
Cult. This plant will thrive best in a peat soil in a moist 
situation ; if planted in pots they should stand in pans of water. 
It may be increased by dividing at the root or by seed.+ 
IV. BY’BLIS (Byblis in mythology, the daughter of Miletus, 
who was changed into a fountain; in allusion. to the habitation 
of the plant in bogs). Sal. parad. t. 95. D.C. prod. 1. p. 319. 
Lin. syst. Pentdndria, Monogynia. Sepals and petals 5, 
not appendiculate. Stamens 5. Anthers bursting by 2 pores 
at the apex. Style 1, filiform. Stigma 2-lobed. Capsule 2- 
valved, 2-celled, many-seeded. . 
1 B. uinirto‘’ra (Salisb. 1. c.). %. S. B. Native of New 
Holland on bogs. A little simple herb with linear leaves beset 
with glandular hairs as in Drésera. Flowers blue. 
Flax-flowered Byblis. Fl. May, July. Clt. 1803. Pl. 4 ft. 
Cult. This plant should be treated in the same manner as 
that recommended for the genus Drésera. It should be kept in 
the stove. It can only be increased by seeds, which should be 
allowed to sow themselves. Plants should be introduced, as 
seeds will not vegetate after a voyage. . 
V. RORYDULA (a diminutive of ros roris, dew ; because of 
the leaves being beset with glandular hairs, which appear like 
dew). Lin. syst. veg. 244. D.C. prod. 1. p. 320. 
Lin. sysr. Pentdndria, Monogynia. Sepals and petals 5, 
not appendiculated. Stamens 5; anthers bursting by 2 pores 
at the apex, and each drawn out at the base into a callous ap- 
pendage. Style 1. Stigma 3-lobed. Capsules 3-celled, 3- 
valved. Seeds generally solitary in each cell. 
1 R. venra‘ra (Lin. l c.) h. G. Native of the Cape of 
Good Hope. Lam. ill. t. 141. Leaves linear, crowded, fringed, 
with the margins beset with glandular hairs. Bracteas leafy. 
Flowers white or blueish, in terminal racemes. 
Var. B, muscicàpa (Geert. fr. 1. t. 62.) growing along with 
var. a. Petals narrower, white. 
Toothed-leaved Roridula. Shrub 1 to 3 feet. 
Cult. Cultivation and treatment the same as for the green- 
house species of Drósera. 
VI. DROSOPHY'LLUM (from òpococ, drosos, dew, pvAXor, 
Phyllon, a leaf; in allusion to the leaves being beset with stipi- 
tate glands, appearing like dew). Link. in Schrad. journ. 1806. 
1. p. 53. D.C. prod. 1. p. 320. 
IN. syst. Decándria, Pentagynia. Sepals and petals 5, 
approximate, unguiculate. Stamens 10. Styles 5, filiform. 
apsules 5-valved, 1-celled, with the valves bent inwards to the 
middle, so as almost to make the capsule 5-celled. 
hill D. Lusira’nicum (Link. 1. c.). 4%. h. F. Native on sandy 
t s in Portugal ; stem shrubby ; leaves linear, entire, beset with 
coloured glands ; panicle corymbose ; flowers large, sulphur- 
nica Ts - St. Hil. mem. mus. 2. t. 4. f. 13. Drdsera Lusita- 
1 m. spec. 403. -Spérgula droseroides, Brot. fl. lus. 2. 
of 5.—Mor. hist. 3. p. 620. f. 15. t. 4. f. 4.—Pluk. alm. t. 
T.f. 2. 
r ortugal Drosophyllum. Fl. Ju. Aug. Subshrub 3 foot. 
: ult. This singular plant is called in Portugal Herva Pin- 
ra orvalhada. It has not as yet been introduced, there- 
u.F. B. Native of 
Drosorpuyttum. VII. Dionza. VIII. Parnassra. 347 
fore the mode of treatment it may require in our gardens is un- 
known. But from the nature of the soil in which it naturally 
grows, sand, if ever it be introduced we would recommend its 
being grown in pots filled with sand, so. that it might be shel- 
tered during winter. The plant may be probably increased by 
cuttings or seed. _ 
VII. DION £‘A (one of the names of Venus). Ellis, nov. 
act. ups. l. p. 98. t.8. Lin. mant. 151. D.C. prod. 1. p. $20. 
_ Lin. syst. Decdndria or Polydndria, Monogynia. Sepals — 
and petals 5. Stamens 10-20; anthers bursting laterally. 
Style 1. Stigma fringed. Capsules 5-valved, 1-celled. Seeds 
numerous, half buried in the cellular substance at the base of the 
capsule. 
1 D. muscr’pura (Lin. mant. 
238.). Y&%.S.B. Native of North 
America in swamps of North Ca- 
rolina around Wilmington. Vent. 
malm. t. 29. Ker. bot. reg. t. 785. 
Sims, bot. mag. 785. Delaum. herb. 
amat. 349. Herbsmooth. Leaves ra- 
dical, on long footstalks, which are 
dilated at the top into a 2-lobed ir- 
ritable'limb, which is beset with one 
row of long hairs on the margin, 
which fold together when touched 
in the manner of the teeth ofa trap. 
Flowers white, in terminal corymbs. 
This is a singular plant in respect 
of its leaves, which areʻof an ano- 
malous form, and have a singular 
motion by which they catch insects, whence the specific name 
muscipula, a fly-trap. The root is scaly, almost like a bulb, and 
not prolific in fibres. The leaves have the petiole winged as in 
the orange ; the extreme part or proper leaf is the part that 
operates as atrap. As soon as the insect enters, the lobes of 
the leaf fold together, and remain so as long as the insect con- 
tinues to struggle, but as soon as it ceases and is quiet the leaf 
opens and permits it to escape. A straw or pin introduced 
between the lobes of the leaf will have the same effect. Mr. 
Ellis thinks it probable that a sweet liquor discharged by the 
red glands on the inner surface tempts insects to their destruc- 
tion. ‘ On the side of each lobe of the leaf stand about three 
erect, highly irritable bristles, which, when touched, cause the 
two lobes to fold together like a rat-trap, imprisoning insects ; 
no doubt that their bodies may administer an air wholesome to 
the plant, which theory and recent observations on Sarracenia, 
Drésera, and Nepénthes confirm.” Smith, introd. bot. 
Venus’s Fly-irap. Fl. July, Aug. Clt. 1768. PI. 4 tod ft. 
Cult. This plant thrives best in small pots in peat earth, and 
some dwarf species of moss placed underneath in the pot, the pots 
should then be placed in a pan of water and set in a cool place 
near the glass in the stove. Seeds are sometimes produced, by 
which they may be increased as well as by dividing the plants at 
the root. Mr. Shepherd of Liverpool finds that the leaves will 
root, if placed on damp moss, and emit young plants from their 
edges. 
VIII. PARNA’SSIA (from Mount Parnassus, the abode of | 
grace and beauty, where, on account of the elegance of their form, 
these plants are feigned to have first sprung up). Tourn. inst. 
t. 127. Lin. gen. 384. D. C. prod. 1. p. 320 
Lin. syst. Pentandria, Tetragýnia. Sepals 5. Petals 5. 
Scales 5 (perhaps abortive stamens) opposite the claws of the 
petals, ending in tufts of bristles which are glandular at the 
apex. Stamens 5; anthers behind. Stigmas 4, sessile. Cap- 
sules 4-valved, 1-celled; valves with a narrow dissepiment in ` 
Yy2 l ; 
FIG. 68. 
