DROSERACEJL IV. BYBLIS. V. RORIDULA. VI. DROSOPHYLLUM. VII. DION^A. VIII. PARNASSIA. 



347 



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 Saxifrages. 



1 R. UNALASCHIE'NSIS (Cham. 1. c.). %. F. B. Native of 

 moist valleys in the island of Unalaschka. Herb with the habit 

 of Saxlfraga or Adoxa. Leaves stalked, roundish, reniform, 

 deeply toothed. Flowers whitish, without bracteas, in terminal, 

 few-flowered racemes. 



UnUaschka Romanzowia. PL \ 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.f 



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. LINIFLO'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 Drosera. Flowers blue. 



Flax-flowered Byblis. Fl. May, July. Clt. 1803. PI. \ ft. 



Cult. This plant should be treated in the same manner as 

 that recommended for the genus Drosera. 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. RORI'DULA (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. SYST. 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. DENTA'TA (Lin. 1. c.). ^ . 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. ft, muscicapa (Gaert. 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 Drosera. 



VI. DROSOPHY'LLUM (from fyo<roc, drosos, dew, ^wXXov, 

 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. B.C. prod. 1. p. 320. 



LIN. SYST. Decandria, Pentagynia. Sepals and petals 5, 

 approximate, unguiculate. Stamens 10. Styles 5, filiform. 

 Capsules 5-valved, 1 -celled, with the valves bent inwards to the 

 middle, so as almost to make the capsule 5-celled. 



1 D. LUSITA'NICUM (Link. 1. c.). %. 17 . F. Native on sandy 

 hills in Portugal ; stem shrubby ; leaves linear, entire, beset with 

 stipitate glands ; panicle corymbose ; flowers large, sulphur- 

 coloured. St. Hil. mem. mus. 2. t. 4. f. 13. Drosera Lusita- 

 nica, Lin. spec. 403. Spergula droseroides, Brot. fl. lus. 2. 

 p. 215. Mor. hist. 3. p. 620. f. 15. t. 4. f. 4. Pluk. aim. t. 

 117. f. 2. 



Portugal Drosophyllum. Fl. Ju. Aug. Subshrub 4 foot. 



Cult. This singular plant is called in Portugal Herva Pin- 

 heira orvalhada. It has not as yet been introduced, there- 



FIG. 68. 



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. DIONJTA (one of the names of Venus). Ellis, nov. 

 act. ups. 1. p. 98. t. 8. Lin. mant. 151. D. C. prod. 1. p. 320. 



LIN. SYST. Decandria 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. MUSCI'PULA (Lin. rnant. 

 238.). T/.S. B. Native of North 

 America in swamps of North Ca- 

 rolina around Wilmington. Vent, 

 malm. t. 29. Ker. hot. reg. t. 785. 

 Sims, bot. mag. 785. Delaum. herb, 

 amat. 349. Herb smooth. 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 of a trap. 

 Flowers white, in terminal corymbs. 

 This is a singular plant in respect 

 of its leaves, which are of 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 a trap. 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, 

 Drosera, and Nepenthes confirm." Smith, introd. bot. 



Venus's Fly-trap. Fl. July, Aug. Clt. 1768. PI. to ! 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. Pentdndria, Tetragynia. 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 

 Yy 2 



