DROSERACE^E. I. DROSERA. 



313 



neath ; capsules acuminated, smoothish. Ij . S. Native of 

 Cayenne in woods. Alsodea Piparea, Sprang, syst. 1. p. 807. 



Toothed-leaved Piparea. Shrub 5 feet. 



2 P. MULTIFLO'RA (Gaert. fil. carp. 3. p. 231. t. 224. f. 1.) 

 flowers numerous ; leaves oblong, acuminated, smooth beneath ; 

 capsule rather obtuse, velvety. Tj . S. Native of Cayenne. 



Many-flowered Piparea. Shrub 5 feet. 



Cult. For propagation and cultivation see Ceranthera, p. 342. 



ORDER XXII. DROSERA'CE^l (plants agreeing with Dro- 

 sera in many important characters). D. C. Theor. 214. prod. 

 1. p. 317. Droserese, Sal. parad. no. 95. 



Calyx of 5 permanent equal sepals (f. 68. c.) imbricate in 

 the bud. Petals 5, hypogynous, distinct (f. 67. b. f. 68. a.) or 

 constituting a gomopetalous corolla, as in Romanzbwia, alternating 

 with the sepals, usually marcescent. Stamens free, permanent, 

 sometimes equal in number to the petals (f. 67.)> when this is 

 the case they alternate with them, sometimes double, triple, or 

 quadruple that number (f. 68.). Anthers 2-celled, birimose. 

 Ovary 1, sessile (f. 67. e. f. 68. c.). Styles solitary (f. 68.) 3 (f. 

 67. 6.) 5, sometimes joined at the base, sometimes distinct, divided 

 at the apex (f. 67. &.)> rarely simple. Capsule 1-3-celled, 3 (f. 67. 

 g.) 5 (f. 68. c.) valved ; valves bent inwards more or less at the 

 edges, and opening from the top, sometimes with a seminiferous 

 nerve in the middle of each valve, sometimes only bearing the 

 seeds at the base of the valves. Seeds disposed in two rows 

 along the middle nerve, or crowded at the bottom of the capsule ; 

 they are ovate, shining, naked, or wrapped in a thin follicular 

 arillus. Albumen cartilaginous or fleshy. Embryo straight, 

 slender, with thickish cotyledons, and an obtuse radicle which is 

 turned towards the hilum. This order contains but a small 

 group of plants, inhabitants of bogs, marshes, or inundated 

 grounds ; they are remarkable for the abundance of glandular hairs 

 with which all parts of the herbs are usually clothed ; sometimes, 

 though rarely, the plants are extremely smooth, as in Parndssia. 

 They are all perennial evergreen herbs, only 2 of which are in any 

 way frutescent. The leaves are alternate, the young ones are 

 always rolled up in a circinnate manner, so remarkable in ferns. 

 The petioles are usually furnished with stipular hairs at the base. 

 The young peduncles are usually rolled up in a circinnate man- 

 ner. The flowers are blue, purple, yellow, white, or tinged with 

 red. The medicinal properties of the plants appear to be trifling ; 

 the leaves of all have the power of curdling milk. The order 

 differs from Violariece in the styles being seldom solitary, in the 

 leaves being rolled up in a circinnate manner, before expan- 

 sion not involute. It differs from Polygaleae in the flowers being 

 regular, not irregular, in the capsules being many-seeded, not 

 1-2-seeded, as well as in the leaves being stipulate, not exsti- 

 pulate It differs from all the neighbouring orders in the re- 

 markable habit of plants of which Drosera, Dionata, and Par- 

 ndssia give a very good idea. It is almost impossible to intro- 

 duce seeds in a living state. 



Synopsis of the genera. 



I DRO'SERA. Sepals and petals 5 (f. 67. c.) without appendages. 

 Stamens 5. Styles 3 (f. 67. 6.) 5,2 or many-parted. Bog plants, 

 ornamented with red irritable glandular hairs. 



2 ALDROVA'NBA. Sepals and petals 5, without appendages. 

 Stamens 5. Styles 5, short, filiform. Stigmas' obtuse. A 

 floating water plant, with whorled leaves, having a bladdery com- 

 plicated limb. 



3 ROMANZO'WIA. Sepals 5, connected at the base. Petals 5, 

 joined into a 5-cleft deciduous corolla. Stamens 5, inserted at 

 the bottom of the tube. A plant with kidney-shaped toothed 

 leaves. 



4 BY'BLIS. Sepals and petals 5, without appendages. Sta- 

 mens 5. Style 1, filiform. Stigma 2-lobed. A bog plant with 

 linear leaves ornamented with glandular hairs. 



5 RORI'DULA. Sepals and petals 5, without appendages. Sta- 

 mens 5. Style 1. Stigma 3-lobed. A small bog shrub, with 

 linear leaves, ciliated with glandular hairs. 



6 DROSOPHY'LLUM. Sepals and petals 5, with the claws ap- 

 proximate. Stamens 10. Styles 5, filiform. A small shrub 

 with linear leaves, beset with stipitate glands. 



7 DION*' A. Sepals and petals 5 (f. 6 8. a.). Stamens 10-20. 

 Style 1 (f. 68.). Stigma orbicular (f. 68.). A smooth bog 

 plant, with 2-lobed irritable leaves, which are ciliated on the 

 margins. 



8 PARNA'SSIA. Sepals and petals 5. Scales or abortive sta- 

 mens 5, these end in glandular bristles. Stigmas 4, sessile. 

 Smooth bog herbs with roundish leaves. 



I. DRO'SERA (from Spoaepos, droseros, dewy ; because the 

 plants appear as if covered with dew, in consequence of being 

 beset with glandular hairs). Lin. gen. 391. Lam. ill. t. 220. 

 D. C. prod. 1. p. 317. 



LIN. SYST. Penttindria, Tri-Pentagynia. Sepals and petals 

 5 (f. 67. c), not appendiculated. Stamens 5. Styles 3 f. 67. 6.) 

 6-8, 2 or many-parted. Herbs inhabiting boggy sphagnose places. 

 Leaves ornamented with reddish irritable glandular hairs, dis- 

 charging from their end a drop of viscid acrid fluid. These 

 hairs have been thought irritable, so as to contract when touched, 

 imprisoning insects somewhat in the manner of Dioncea Mus- 

 cipula. 



SECT. I. RORE'LLA (from ros roris, dew, see Genus). D. C. 

 prod. 1. p. 317. Ros-s61is, Tourn. inst. t. 127. Styles sim- 

 ple, or 2-3-parted, with the lobes entire and somewhat capitate 

 at the apex. 



1. Acaules, Stemless. Leaves radical, usually rosulate. 

 Scapes naked. 



1 D. ACAU'LIS (Thunb. prod. 57.) leaves oblong, obtuse, 

 narrowed at the base; scape very short, 1 -flowered. I/. G. 

 Native of the Cape of Good Hope. Flowers white. ? 



Stemless Sun-dew. Fl. Jul. Aug. Clt. 1821. PL | foot. 



2 D. UNIFLO'RA (Willd. enum. 340.) leaves roundish, on 

 short footstalks ; scape short, 1 -flowered. If. . F. Native of 

 the Straits of Magellan. Flowers white or red. 



One-flowered Sun-dew. Fl. Jul. Aug. PL -| foot. 



3 D. PYGM^E'A (D. C. prod. 1. p. 317.) leaves roundish, pel- 

 tate, on long footstalks ; stipulas scarious ; scape 1 -flowered. 

 O- G. Native of New Holland on an island in the entrance to 

 Jervis's Bay. D. pusflla, R. Br. ined. but not of Humboldt. 



Pygmy Sun-dew. PL 1 inch. 



4 D. PAUCIFLO'RA (Banks, herb, and D. C. prod. 1. p. 317.) 

 leaves obovate-oblong, tapering at the base ; scape beset with 

 glandular hairs, 1-2-flowered ; petals thrice as large as the 



