90 



NATURAL HISTORY OF PLANTS. 



are important characters in this family to which an absolute value 

 for classification cannot be assigned, and that of the preceding types, 

 only a certain number of sections * of the genus Daucus can be 

 made. Thus constituted, it comprises scarcely forty species,^ all 

 herbaceous, annual or dicarpous, glabrous or clothed with soft or 

 rigid hairs, straight or hooked, with decompound-pinnate leaves, 

 inflorescence sometimes without involucels and even involucre, and 

 inhabiting all the temperate regions of the five parts of the world. 



Ammiopsis ^ daucoides, an annual of Morocco, has all the characters 

 of vegetation and floration of Daucus and belongs to the same 

 genus, although the primary and secondary ridges of the fruit are 

 visible, but little prominent, especially the former, and the latter 

 have, instead of hairs, a great number of granular protuberances. 

 The vittse are visible or little developed. 



Close beside Daucus is ranged Psammogeton triternatum, an annual 

 of Persia and eastern India, which, with the same general organiza- 

 tion and a seed little concave or flat on the ventral surface, has a 

 fruit whose ridges, both primary and secondary, bear a vertical series 

 of long hairs with capitate extremity. Near this genus has been 

 rightly placed Exoacantha heterophylla, a Syrian plant whose flower 

 and fruit are those of Ammiopsis, with primary and secondary ridges 

 little developed, but visible, with granulations much less distinct ; ' 

 but the bracts of the involucre and involucels thicken into rigid 

 spines, giving the plant the appearance of certain Thistles. 



Guminum (fig. 70, 71) is a glabrous annual, the organization of 

 which is nearly that of Daucus, with the bracts of the involucre and 



1. Budaucus. 



2. Ammodaueus (Coss. et Dur,). 



3. Burieua (Boiss. et Rect.). 

 4 ? Chietosciaiium (Boiss.). 

 6. Or^aya (Hofpm.). 



Daucus. ) 6. Usma (Boiss.). 

 Sect. 11. 7. Turgeniopsis (Boiss.). 



8. Torilis (Adans.). 



9. Turgenia (Hofpm.). 



10. Caucalis (L.). 



11. Ammiopsis (Boiss.).. 



» Desp. Fl. Atlant. t. 59-65.— Eeichb. le. Fl . 

 Germ. t. 1999-2011.— Sibth. Fl. Groec. t. 269- 

 272.— Steinh. Ann.Sc. Nat. ser. 2, ix. 203, t. 8. 

 — Boiss. Voti. Esp. t. 68 ; Diagn. Or. ser. 2, ii. 



95, 98; vi. 89 [Catualis); Fl. Or. ii. 1070 (Or- 

 lat/a), 1071-1078, 1080-1088.— Moris, Fl. Sard. 

 t. 77 *M.— Harv. et SoND. Fl. Cap. ii. 563, 564 

 {Torilis).— Bbntu. Fl. Austral, iii. 376.— Hook. 

 p. Handb. iV. Zeal. Fl. 98.— C. Gat, Fl. Chil. iii. 

 134.— A. Gray, Man. ed. 5, 191.— Chapm. Fl. 

 S. Unit. St. 161.^Gren. et Gode. Fl. de Fr. i. 

 664.— Walp. Eep. u. 419, 420 {Caucalis), 421 

 {Turgenia, Torilis, Durieua) ; v. 899, 900 {Bu- 

 rieua), 901 (Turgenia), 701 {Turgeniopsis, Lisisa), 

 903 {Torilis) ; Ann. i. 364 ; ii. 716, 717 {Torilis); 

 T. 77, 78 {Caucalis). 



3 Boiss. Diagn. Or. ser. 2, ii. 96. — B. H. Gen. 

 n. 142. — H. Bn. Adansonia, xii. 163. 



