6-28 



OROBANCHEjE. I. OEOBANCHE. 



Radicle superior, remote from the umbilicus. Usually para- 

 sitical, leafless, rather fleshy, rufescent, scaly herbs. Flowers 

 terminal, solitary, spicate, or racemose. 



This is a very natural family, well distinguished from the pre- 

 ceding by their permanent corolla, unilocular ovarium, centri- 

 fugal embryo, and peculiar economy, in being for the most part 

 parasitical herbs, destitute of proper leaves, and of the green 

 colour common to other plants. The seeds are attached to the 

 narrow, depressed placentae, formed by the united edges of the 

 valves. The embryo is placed in the ventral side of the seed, 

 and at the opposite extremity from the hilum, resembling a 

 minute, nearly globular homogeneous mass, and is, therefore, 

 probably devoid of true cotyledons. In all these respects the 

 genera Obolaria and Tozzia seem to agree, but differ in having 

 proper leaves, and in being terrestrial. 



Synopsis of the genera. 



TRIBE I. 

 OROBANCHIE'^:. Parasitical, leafless herbs. 



1 OROBA'NCHE. Calyx bractless, somewhat 1-2-parted. 



2 PHELIP^A. Calyx tubular, bibracteate, 4-5-toothed, or 4- 

 5-cleft. 



3 ANOPLON. Calyx bractless, 5-cleft, sub-bilabiate. 



4 BOSCHNIA'KIA. All as in Orobdnche, but the calyx is trun- 

 cate, and unequally 5-toothed ; the capsule opens laterally, the 

 stigma sub-bilabiate, and terminated by a stigmatose margin. 



5 CANOPHOLIS. Calyx ventricose, 5-parted, bibracteate. 

 Corolla incurved : upper lip entire : lower one bifid. 



6 EPIPHE'GUS. Calyx short, 5-toothed, bractless. 



7 LATHR V A. Calyx bibracteate, campanulate, 4-cleft. 



8 HYOBA'NCHE. Calyx tubular, 7-cleft, unequal, bibracteate. 



9 ALE'CTRA. Calyx bilabiate, bractless ? upper lip 2-cleft ; 

 lower one triful. 



10 ^EGINE'TIA. Calyx spathaceous. Capsule many-celled. 



11 AMBLA'TUM. Calyx campanulate, 4-cleft. Both lips of 

 corolla entire. 



TRIBE II. 

 OBOIARIE V . Terrestrial, leafy plants. 



12 OBOLA'RIA. Calyx 5-cleft, bibracteate. Corolla cam- 

 panulate. 



13 TOZZIA. Caylx 5-toothed, bractless. ? Corolla ringent, 

 tubular. Capsule 1 -seeded by abortion. ? 



Tribe I. 



OROBANCHIE v .5i (this tribe contains plants agreeing with 

 the genus Orobdnche.) Parasitical, leafless, fleshy, scaly plants. 



1 OROBA'NCHE (of Pliny, Opo/3av X '? of Theophrastus and 

 Dioscorides ; from opo/3oe, orobos, a vetch ; and a-y-^ia, ancho, to 

 strangle ; because it is supposed to strangle and kill the plants 

 on which it grows.) Tourn. inst. p. 176. t. 81. Lin. gen. no. 

 779. Schreb. gen. no. 1045. Juss. gen. p. 101. ed. Usteri, p. 

 113. Gaertn. fruct. 3. p. 42. t. 185. f. 4. Lam. ill. t. 551. 

 Wallr. orob. sect. 1. Osproleon. Led. fl. alt. 2. p. 450. Aphyl- 

 lon, Michel, gen. t. 25. 



LIN. SYST. Didynamia, Angiospermia. Calyx bractless, 1-2- 

 parted ; sepals distinct, or combined on one side at the base. 



Corolla tubular, ringent : upper lip 2-lobed : lower one trifid. 

 Stamens 4, didynamous. Stigma capitate, emarginately 2-lobed. 

 Ovarium glandular at the base. Capsule 1 -celled, 2-vaIved ; 

 valves dehiscing laterally, but joined at the base and apex. Pla- 

 centas parietal, 2 in each valve. Parasitical, fleshy, usually 

 simple, rarely branched, scaly, erect herbs. Flowers sessile, 

 erect, solitary, in the axils of the floral scales. There is a fleshy 

 gland that girds the ovarium. Filaments usually hairy, flat at 

 the base. Anthers glabrous ; cells mucronate at the base. 



SECT. I. Sepals free, or combined in front at the lower part, 

 open behind. 



1. Upper lip of corolla emarginale, or refuse, never bifid. 

 * Corolla dilated, sub-campanulate, never narrow, or cylindrical. 



1 O. CARYOPHYLLA'CEA (Smith, in Lin. trans. 4. p. 169. Led. 

 fl. alt. 2. p. 452.) hairy, or pubescent ; floral scales lanceolate, 

 equal in length to the flowers ; sepals bifid : lobes linear- lanceo- 

 late, equal ; corolla sub-campanulate, straightish : lower lip a 

 little shorter than the upper : lobes equal, obtuse, denticulately 

 curled ; filaments hairy at the base, glandular, as well as the 

 style at the apex; stigma emarginate. If.. H. Native of 

 Siberia ; Italy ; and about Lauterine in the Palatinate; also on the 

 Himalaya at Pungee. Wallr. orob. p. 36. Bieb. taur. 2. p. 81. 



0. major, Poll. pal. no. 600. Vill. dauph. 2. p. 407. Falck, 

 topog. beytr. 2. p. 212. Pall. ind. taur. Hablit/, taur. p. 154. 

 Desf. fl. atl. 2. p. 58. Orobanche major caryophyllum redo- 

 lens, Bauh. pinn. p. 87. Tourn. inst. 176. t. 81. Riv. mon. irr. 



1. t. 89. Gmel. sib. 3. p. 214. no. 28, exclusive of all the 

 synonymes. Plant yellowish, or rufescent, as well as the corollas, 

 which are tipped with purple. Upper lip of corolla large, emar- 

 ginate. Stigma brown, or purplish. The plant has a strong 

 smell of cloves when fresh, hence the specific name. The bulb 

 is said to be scaly. 



Clove-scented Broom-Rape. PI. 1 to 1 J foot. 



2 O. CRUE'NTA (Bertol. amcen. ital. p. 89.) pubescent ; scales 

 lanceolate, acuminated ; spikes loose at bottom and dense at 

 top ; floral scales shorter than the flowers ; upper lip of corolla 

 emarginate ; segments of the lower lip fimbriately curled ; inner 

 sides of filaments very hairy, as well as the top of ovarium 

 and style ; stigma yellow. I/. H. Native of Italy. O. caryo- 

 phyllata, Viv. ann. bot. 1. p. 175. Plant, as well as flowers, 

 reddish. 



Blood-ted Broom-Rape. PI. 1 to 1^ foot. 



3 O. MA'JOR (Lin. spec. 882, exclusive of the syn. but not of 

 D. C.) hairy ; bulb middle sized, scaly ; scales lanceolate, not 

 adpressed ; sepals bifid ; corolla inflated, a little curved : upper 

 lip blunt, entire ; lobes of lower lip equal, acute, denticulated ; 

 filaments glabrous at bottom, and hairy at top ; style hairy, 

 pubescent at top, yellow ; stigma 2-lobed. If. H. Native of 

 Europe, growing on furze or broom ; plentiful in some parts 

 of Britain. Sutton, in Lin. trans. 4. p. 175. Curt. lond. 4. t. 

 44. Smith, engl. bot. 421. O. barbata, Brot. fl. lus. 1. p. 183. 

 O. Ulicis Europae'i, Vauch. Petiv. brit. t. 69. f. 10. Plant 

 dusky yellow, or tinged with purple. Corollas of a brownish 

 rust-colour, tinged with purple, yellowish, or purple. 



Larger, or Common Broom-Rape. Fl. June, July. Britain. 

 PI. i to 1 \ foot. 



4 O. RI'GENS (Lois. fl. gall. p. 384.) scape glabrous ; scales 

 lanceolate, stiff, downy, imbricated ; flowers loosely spicate ; 

 style and stamens glabrous ; lobes of lower lip of corolla 

 acutish ; stigma bifid ; lobes distant. If. . H. Native of Cor- 

 sica ; and of Germany. Lois. D. C. fl. fr. 5. p. 392. 



Stiff-scaled Broom-Rape. PI. J foot. ? 



5 O. EPITHYMUM (D. C. fl. fr. 3. p. 490.) scape nearly 



