408 186. U M HE LLI FERAE 



47. Mericarps without dorsal ribs. Oil-channels only in the marginal ribs. 

 Petals white. — Species i. South Africa. [Pappea Send. & Harv.) 



Choritaenia Benth. & Hook. 



Mericarps with filiform dorsal ribs. Oil-channels also or\ the back of the 



mericarps 48 



4S. Thickened margin of the mericarps gibbous. Oil-channels very thin. 

 Calyx toothed. Petals white, 2-cleft. — Species 2. North Africa. 



They yield vegetables and medicaments Tordylium L. 



Thickened margin of the mericarps slightly uneven. Oil-channels dis- 

 tinctly developed 49 



49. ^Marginal wings of the mericarps traversed lengthwise by a broad oil- 



channel. Petals yelk)w, turned or rolled inwards at the top. — Species 7. 



East and North Africa , Malabaila Hoffm. 



Marginal wings of the mericarps not traversed by an oil-channel. Petals 

 white, hairy. — Species i. North-east Africa (Egypt). (Under Herac- 

 leitm L.) Zozimia Hoffm. 



50. Oil-channels not extending to the base of the mericarps, usually ending 



at the middle in a club-shaped swelHng, solitary in the furrows. Dorsal 

 ribs slightly prominent. Marginal wings membranous. Calyx toothed. 

 Petals deeply emarginate, usually white. Involucels of many bractlets. 

 — Species 2. North Africa and Abyssinia. They yield edible roots, 



fodder, and medicaments Heracleum L. 



Oil-channels, at least some of them, extending to the base of the fruit. 

 Calyx rarely toothed. Petals slightly or not emarginate, yellow greenish 

 or reddish 51 



51. Leaves once pinnatisect. Flowers mostly hermaphrodite, only those 



of the uppermost lateral umbels male. Petals broad, much rolled in. 

 Marginal wings of the mericarps membranous. Oil-channels solitary in 

 the furrows, rarely in pairs. — Species 2. One growing wild in South 

 Africa, the other cultivated in North .Africa. Root edible. " Parsnip." 



(Under Peiicedanuni L.) Pastinaca L. 



Leaves repeatedly pinnatisect. Flowers polygamous, those of the lateral 

 umbels male. Petals narrow, shortly bent inwards. Disc broad. 

 Marginal wings of the mericarps thickish or indistinct. — Species 10. 

 North and East Africa. Several species yield a gum-resin (African 

 ammoniacum) used industrially and medicinally, others serve as veget- 

 ables or as ornamental plants Ferula L. 



52. (45.) Dorsal ribs of the mericarps very prominent. Marginal ribs more or 



less thickened. Oil-channels solitary in each rib and solitary or wanting 

 in the furrows. Umbels opposite to the leaves, of few rays. Petals 

 white. — Species 4. North and South Africa. Some have edible roots. 

 [Knihera Hoffm., including Sclerosciadium Koch). Capnophyllum Gaertn. 

 Dorsal ribs of the mericarps slightly prominent, more or less filiform. . 53 



