UMBELLIFEBM. 



89 



between this shallow concavity in the internal face of the seed and a 

 very deep fuiTOW around which the margins of the seed may even be 

 largely involute (fig. 69). There is also every possible degree in the 

 size of the hairs on the primary and secondary ridges. They are, for 

 example, quite erect, 



rigid and sharp in C, Laucm {Caiicalis) Uoyeni.^ 



latifolia, type of agenus 

 Turgenia,^ whilst in G. 

 daucoides, those of the 

 secondary nervures are 

 more developed. Each 

 ridge may bear one or 

 two series, more rarely 

 three. Under the se- 

 condary, vittee of little 

 thickness, are always 

 found in Liscea,^ the 



hairs of which vary much in size, as well on the primary as on the 

 secondary ridges,^ and vittse very thin or even almost nil in Turgeni- 

 opsis,^ the fruit of which is otherwise nearly that of Caucalis.^ 



On the other hand, in Orlaija,^ which recent authors have rightly 

 referred as a section to Daums, the fruit and seed are mach more 

 compressed from front to back in nearly all the species, and the 

 commissural face of the seed is flat or even slightly convex. The 

 hairs of the secondary ridges are generally 2 -seriate, but they may also 

 be in a single series. From these examples it is evident that there 



Fig. 69. Trans, sect, of fruit (f ). 



1 HoFFM. Umbell. 59. — Koch, Umbell. 80, 

 f. 16.— DC. Prodr. iv. 217.— Endl. Gen. n. 

 4502. 



2 Conium Royoii L. Spec. 340. — Caucalis 

 daucoides L. Majitiss. 351. — Daucus leptophyllus 

 Scop. Fl. Carniol. i. 190. 



3 BoiSR. Ann. Sc. Nat. ser. 3, ii. 54 ; Fl. Or. 

 ii. 1087.— Endl. Gen. n. 45022. 



* Here as in the true Daucus the points have 

 a greater tendency to disappear at the internal 

 than at the external margin of the fruit. 



6 Boiss. Jnn. Sc. Nat. ser. 3, ii. 53 ; Fl. Or. 

 ii. 1080, — Glochidiotheca Fexzl, Russ. Reis. i. 

 p. ii. 970.— Endl. Gen. n. 4502^. 



^ The ridges are also effaced in Torilis tricho- 

 sperma Sprexg. ( Umbell. 142) of which Boissier 



has just made the genus Cheeto^ciadiuni {Fl. Or. 

 ii. 1078) and which, having the mericarps 

 covered with setiform hairs, seems to connect 

 the genus with Psammogeton. Ammodaucus 

 (Cobs, et Dur. Kralik exs. Alger.) is in other 

 respects a Daucus with long and ciliate hairs, 

 by these characters intermediate between other 

 species of Daucus and Chcetosciadium. Its seeds 

 are flat or slightly concave within, and the 

 same is the case with those of Durieua (Boiss. 

 et Reut. Diagn. PI. Nov. Hisp. 14), which has 

 the flower of Daucus, except the petals, de- 

 scribed as " small not radiating ; " which all 

 the more here constitute a sectional character. 

 ' HoFFM. Umbell. 58.— Koch, Umbell. 78, fig. 

 12, 13.— DC.P/-oc?7-.iv. 269.— Endl. G^<»«. n. 4496. 



