sxxii GENEKA. 



B. Corolla inferior, of 1 stamiiiiferous petal. 



i. Follicles 2. Apocyne^. 



542. APOCYNUM. Cor. campanulate. Fil. 5, alternate with as many scale-like glands^ 

 and with the segments of the corolla, p. 245. 



543. CYWANCHUM. Cor. rotate. Crown of Nect. cylindrical, 5-tipped. Stigma' 

 apiculate. p. 245. 



544. PEKIPLOCA. Cor. rotate: segments somewhat twisted, with 5 intermediate- 

 scales, each ending in a long curved point. Staminal Tube of 5, free, externally bearded FiL. 

 p. 246. 



545. GOMPHOCARPUS. Cor. rotate, spreading. Crown of Nect. of 5 urceolate' 

 tubes. Follicles ventricose, covered with soft spines, p. 246. 



546. ASCLEPIAS. Cor. rotate, reflexed. Crown of the Nect. of 5 hood-like L. Stigma 

 pointless, p. 246. 



547. STAPELIA. Cor. rotate, fleshy. Nect. a double star, 5-cleft, covering the organs;. 

 Follicles subcylindrical. A fleshy plant, with fetid Fl. The angular leafless Stem beset with 

 acuminate tubercles, p. 246. 



ii. Fruit a capsule. 



552. LOMATOaOTflUM. Caps. 1-celled. Placentas attached to margin of valves. 

 Style 0. Cor. rotate, without nectaiiferous pores. GENTiANEiE. p. 246. 



551. SWERTIA, Caps. 1-celled, many-seeded. Cor. rotate; 2 nectariferous pores at 

 base of each segment. Habit of Gentiana. Gentiane^. p. 246. 



553. GETfTIANA. Caps. 1-celled, many-seeded. Cor. tubular, without pores. Seeds- 

 parietal. Styles often combined. Plant erect. L. opposite. Gentiane.e. p. 246. 



559. CKESSA. Caps. 2-valved, 1-4-seeded. Cor. salver-shaped, 5-parted. Branched. 

 L. simple, alter7iate, quite entire. Convoltulace^. p. 251. 



560. CTJSCUTA. Caps. 2-celled, 4-seeded, bursting transversely. Cor. campanulate,. 

 wdth internal scales. Parasitical leafless Herbs, with a twining- stem and no cotyledons, Gon- 

 VOLVULACE^. p. 251. 



Velezia occasionally. 



C. Cor. inferior. Pet. 5. Paeonyceie^, 



250. HERNIAKIA. Caps, membranous, not opening, 1-seeded, invested with calyx. 

 Pet. 5, very narrow, like abortive Fil. Small plants, with opposite L., and clusters of inconspicu- 

 ous Fl. p. 130. 



D. Fl. of 5 petals, superior. Seeds 2. Umbellate. 

 [In the following arrangement of the Tribes, I have nearly followed De Candblle. Perhaps 

 it might be improved, as a natural arrangement, by rendering it less systematical. Crithmum 

 and Cachrys have corky seeds ; and to these, perhaps, might be joined (Enanthe. This latter 

 genus and jFthusa have a white mass on each side of the ripe seed, filling up the surface of the, 

 fruit, so as to leave no depression between the seeds. Conium, which has curved seeds, would, 

 perhaps, in a more natural arrangement, be joined to the Amminece. The difference between 

 these and the Seselinece is sometimes obscure ; and the stddent must be careful not to depend 

 upon unripe seeds, since in many genera, where, when young, they form a fruit nearly circular on^ 

 the section, they afterwards become angular and contracted at their junction ; each seed in the 

 section being nearly pentagonal.] 



Sect. I. Kernel straight, or nearly so. 

 a. Umbel imperfect or simple. 



1. Eryngie.*. Fl. in ahead. Gen. 271. 



2. Sanicule.®. Umbel simple or imperfect. Fr. subovoid. Gen. 272-275. 



