26 



flattened laterally, with prominent equal filiform ribs (the inter- 

 mediates somewhat distant from the laterals), and a thin pericarp 

 with a verv small ill-defined group of strengthening cells beneath 

 each rib. Oil-tubes conspicuous, 8 to 6 in the intervals, 4 to 10 on 

 the commissural side (sometimes almost continuous). Seed terete; 

 the face strongly involute, enclosing a central cavity. 



48. Museniopsis. Calyx-teeth obsolete. Fruit oblong, 

 glabrous. Carpel somewhat fiattened laterally, with equal filiform 

 ribs (the intermediates somewhat distant froin the laterals), and a 

 thin pericarp with ill-defined stiengthening cells beneath the ribs. 

 Oil-tubes 3 to 4 in the intervals, 4 on the commissuial side. Seed 

 terete; the face with a deep and narrow sulcu;;. 



(b). Oil-tubes none. 



44! Conium. Calyx-teeth obsolete. Fruit ovate, glabrous. 

 Carpel with prominent wavy ribs, each with a large bundle of 

 strengthening cells. Oil-tubes none, but a layer of secreting cells 

 next the seed. Seed face deeply and narrowly concave. 



(3). Fruit with plane seed-face, depressed stylopodium, and numei- 

 ous oil-tubes. 



89. Bupleurum may be looked for here. 



45. Sium. Calyx-teeth minute. Fruit .o\ate to oblong, 

 glabrous. Carpel with prominent corky nearly equal ribs, each 

 with a promineat group of strengthening cells at tip. Styles 

 short. Oil-tubes 1 to 8 in the intervals (never solitary in all the 

 intervals), 2 to 6 on the commissural side. Seed sub-angular. 



(4). Fruit witti plane seed-face, depressed stylopodium (or none), ^nd 

 solitary oil-tubes in all the intervals. 



(a). Kibs broad and corky, without strengthening cells oi nearly so. 



46. Apium. Calyx-teeth obsolete. Fruit ovate or broader 

 than long, glabrous. Carpel with prominent obtuse nearly equal 

 ribs, and no strengthening cells. Stylopodium wanting or de- 

 pressed. Oil-tubes 2 on the coinmissural side. Seed section 

 round. 



47. Harbouria. Calyx-teeth evident. Fruit ovate, with 

 narrow commissure (carpels appearing nearly distinct), tubercu- 

 late-roughened. Carpel (round in section) with ccjual broad 



