XXvi SYNOPSIS OF GENERA. 



* * Cotyledons incumbent. 



Subularia. Pouch entire, transversely compressed ; valves tumid. Seeds 

 numerous. Cotyledons linear, p. 30. 



Isatis. Pouch entire, deciduous, bordered, transversely compressed, of 

 2 valves, and 1 cell. Seed solitary, p. 27. 



Camelina. Pouch entire j valves tumid. Seeds numerous, not bordered. 

 Filam. all simple, p. 25. 



Lepidium. Pouch cloven, elliptical, of 2 cells, and two keeled valves. 

 Seeds solitary in each cell. p. 26. 



Order II. Siliquosa. Fruit a long many-seeded pod. 

 * Cotyledons flat, accumbent. 



Cheiranthus. Pod rather compressed, straight. Stigma either of 2 

 spreading lobes, or capitate. Cal. closed ; 2 of the leaves prominent at the 

 base. p. 17- 



Matthiola. Pod nearly cylindrical, straight. Stigma of 2 converging 

 lobes, either thickened or protuberant at the back. Cal. closed ; 2 of the 

 leaves prominent at the base. p. 17. 



Nasturtium. Pod nearly cylindrical, oblique ; valves concave, without 

 keels. Stigma obtuse, notched. Cal. spreading, equal at the base. p. 17- 



Barbarea. Pod quadrangular, two-edged. Seeds in a single row. Cal. 

 erect. Glands at the inside of the shorter filaments, p. 18. 



Arabis. Pod linear ; valves flat. Seeds in a single row. p. 19. 



Cardamine. Pod linear ; valves flat, without ribs, bursting elastically 

 from the base. Seeds on capillary stalks, p. 20. 



* * Cotyledons flat, incumbent. 



Sisymbrium. Pod nearly cylindrical. Stigma capitate, notched, p. 23. 



Hesperis. Pod inaccurately quadrangular. Stigma nearly sessile, of 2 

 converging lobes. Cal. closed, with 2 protuberances at the base. Seeds not 

 bordered, p. 23. 



Erysimum. Pod quadrangular. Stigma capitate, notched, p. 24. 



* * * Cotyledons folded, incumbent. 



Brassica. Pod nearly cylindrical, beaked, with 2 valves. Seeds nearly 

 globular. Cal. closed, p. 28. 



SiNAns. Pod nearly cylindrical, somewhat beaked, with 2 valves. Seeds 

 nearly globular. Cal. spreading, p. 29. 



Rafhanus. Pod tumid, imperfectly jointed, without valves. Seeds 

 globular, p. 30. 



Class XVI. Monadelphia. Filaments combined ; in one set. 



Order I. Pentandria. Stamens 5. 



Erodium. Style 1. Fruit beaked, of 5 aggregate capsules, each tipped 

 with a spiral awn, bearded on the inside. Geraniaceas, p. 57. 



(See Linum in CI. V. Ord. I Geran. pusillwn in Ord. Decandria.) 



Oxalis in CI. X. 



