flattened laterally, with prominent equal filiform ribs (the inter- 
mediates somewhat distant from the laterals), and a thin pericarp 
with a very small ill-defined group of strengthening cells beneath 
each rib. Oil-tubes conspicuous, 3 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. 
, 43. Museniopsis. Calyx-teeth obsolete. Fruit oblong, 
glabrous. Carpel somewhat flattened laterally, with equal filiform 
ribs (the intermediates somewhat distant from the laterals), and a 
thin pericarp with ill-defined strengthening cells beneath the ribs. 
Oil-tubes 3 to 4 in the intervals, 4 on the commissural side. Seed 
terete; the face with a deep and narrow sulcus. 
(b). Oil- tubes none. 
\ 
44. Conium. Calyx-teeth obsolete. Fruit ovate, glabi'ous. 
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 numer- 
ous oil-tubes. 
39. Bupleurum may be looked for here. 
45. Siutn. Calyx-teeth minute. Fruit ovate to oblong, 
glabrous. Carpel with prominent coi'ky nearly equal ribs, each' 
with a prominent group of strengthening cells at tip. Styles 
short. Oil-tubes 1 to 3 in the intervals (never solitary in all the 
intervals), 2 to 6 on the commissural side. Seed sub-angular. 
(4) . Fruit with plane seed-face, depressed stylopodium (or none), and 
solitary oil-tubes in all the intervals. 
(a). Eibs broad and corky, without strengthening cells or 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 commissural 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 ecpial broad 
