CRUCIFERJE. (MUSTARD FAMILY.) 29 



* Pod terete, or slightly flattened ; the valves nerveless. 



1 N A.STURTIUM. Pod linear, oblong, or even globular, turgid. Seeds irregularly in tw* 

 rows in each cell, small. 



2. IODANTHUS. Pod linear, elongated. Seeds in a single row in each cell. 



* Pod flat ; the valves nerveless. Seeds hi one row hi each cell. 



3. LEAVENWORTHIA. Pod oblong. Seeds winged. Embryo straight ! Leaves all radical. 



4. DENTARIA. Pod lanceolate. Seeds wingless, on broad seed-stalks. Stem few-leaved. 



6. CARDAMINE. Pod linear or linear-lanceolate. Seeds wingless, on slender seed-stalk*. 



Stems leafy below. 

 * * * Pod flattened or 4-angled, linear ; the valves one-nerved hi the middle, or veiny. 



6. ARABIS. Pods flat or flattish. Seeds in one row in each cell. Flowers white or purple. 



7. TURRITIS. Pods and flowers as in Arabis, but the seeds occupying two rows hi eaeh celL 



8. BARBAREA.. Pod somewhat 4-sided. Seeds hi one row in each cell. Flowers yellow- 



TEIBE H. SISYMBRIE JB. Pod elongated. Seeds thickish. Cotyledons incumbent, 

 narrow, plane. 



9. ERYSIMUM. Pod sharply 4-angled, linear. Flowers yellow. 



10. SISYMBRIUM. Pods terete, or obtusely 4 - 6-angled, or flattish. Flowers white or yellow. 



TRIBE III. BRASSICEJE. Pod elongated. Seeds globular. Cotyledons incumbent 

 and conduplicate, folded round the radicle. 



11. SINAPIS. Pod terete ; the valves 3 -5-nerved. Calyx spreading. 



II. SILICULOS^E. Pod short, a silicle or pouch, opening by valves. 



TRIBE IT. ALYSSINEJE. Pod oval or oblong, flattened parallel to the broad parti- 

 tion, if at all. Cotyledons accumbent, plane. 



12. DRABA. Pod flat, many-seeded : valves 1 - 3-nerved. 



13. VESICARIA. Pod globular, inflated, 4 - several-seeded : valves nerveless. 

 1. NASTURTIUM. Pod turgid, many-seeded : valves nerveless. 



TRIBE V. C AMELINE^. Pod ovoid or oblong, flattened parallel to the broad parti- 

 tion. Cotyledons incumbent, plane. 



14. CAMELINA. Pod obovoid, turgid : valves 1-nerved. Style slender. 



TRIBE VI. iLEPIDIXEJE. Pod short, the boat-shaped valves flattened contrary to 

 the narrow partition. Cotyledons incumbent (accumbent in one instance), plane. 



15. LEPIDIUM. Pod two-seeded. 



16. CAPSELLA. Pod many-seeded, inversely heart-shaped-triangular. 



TRIBE Til. SUBUL ARIEJE. Pod oval, turgid, somewhat flattened contrary to the 

 broad partition. Cotyledons long and narrow, transversely folded on themselves and 

 incumbent. 



17. SUBULARIA. Pod several-seeded : the valves convex-boat-shaped. 



TRIBE "vTU. SENEBIERE.aE. Pod compressed contrary to the very narrow parti- 

 tion ; the cells separating from the partition at maturity as two closed one-seeded nut- 

 lets. Cotyledons as hi Tribe 7. 



18. SENEBIERA. Nutlets or closed cells roundish, reticulated. 



HI. LOMENTACEJE. Pod articulated, i. e. separating across into two 

 or more closed joints. 



TRIBE IX. C AKILIIVE JE. Cotyledons plane and accumbent, as hi Tribe 1. 



19. CAKILE. Pod short, 2-jointed : the joints 1-celled and 1-seeded. 



TRIBE X. RAPHANK IE. Cotyledons conduplicate and incumbent, as hi Tribe & 



20. EAPHANTJS. Pod elongated several-seeded, transversely intercepted. 



