COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 21 
director of the Kew Gardens. The place and year of publication of 
each are given below: 
Angelica roseana, Contr. Nat. Herb. 5: pl. 24. 1899. 
Drudeophytum glaucum, Contr. Nat. Herb, 3: pl. 14,1895. 
Eryngium sparganophyllum, Hook. Ic. pl. 2508. 1897. Also Proc. Wash. 
Acad. 1: fig. 4. 1900. 
Hesperogenia stricklandi, Contr. Nat. Herb. 5: pl. 27. 1899. 
Leibergia orogenioides, Contr. Nat. Herb. 3: pl. 27. 1896. 
Ligusticum leibergi, Contr. Nat. Herb. 3: pl. 12. 1895. 
Ligusticum eastwoodae, Contr. Nat. Herb. 8: pl. 18. 1899. 
Lilaeopsis carolinensis, Bot. Gaz. 24: 49. fig. 4. 1897, 
Lilaeopsis lineata, Bot. Gaz. 24: 47. fig. 1. 1897. 
Lilaeopsis occidentalis, Bot. Gaz. 24: 48. fig. 2. 1897. 
Lilaeopsis schaffneriana, Bot. Gaz. 24: 48, fig. 3. 1897. 
ARTIFICIAL KEY TO THE GENERA OF NORTH AMERICAN 
UMBELLIFERAE. 
Only the most prominent features of each genus are included and 
exceptional species may be omitted. The native genera are printed in 
bold-face type; the introduced genera in ¢talics. The appended num- 
bers refer to the pages upon which the genera are fully described. 
Flowers in dense heads ...........---.------------- eee eee eee eee Eryngium, 42. 
Flowers not in heads, evidently umbellate. 
Fruit conspicuously bristly. 
Fruit covered with spines or hooked bristles. 
Fruit with strong spines .........--.--------------------+------- Torilis, 251. 
Fruit with hooked bristles. 
Leaves palmately divided, with broad segments .....-..------ Sanicula, 32. 
Leaves ternately dissected, with filiform segments ....--.- Spermolepis, 87. 
Fruit with bristles only on the ribs. 
Bristles barbed at tip; stylopodium obsolete -.........--------- Daucus, 249. 
Bristles not barbed; stylopodium conical......---------------- Caucalis, 69. 
Fruit not bristly (except Washingtonia and Cuminum). 
OIL TUBES OBSOLETE OR OBSCURE. 
Fruit strongly flattened laterally. 
Fruit with secondary ribs and reticulations; involucre conspicuous. 
Centella, 29. 
Fruit without secondary ribs or reticulations; involucre wanting. 
Hydrocotyle, 25. 
Fruit not strongly flattened. 
Seed face concave. 
Stylopodium conical. 
Fruit usually bristly ..........-...--------------- Washingtonia, 60. 
Fruit smooth. 
Fruit linear oblong. 
Fruit without ribs .............-......------------/ Anthriscus, 251. 
Fruit ribbed ..............--.----------+------------- Scandix, 251. 
Fruit of nearly distinct globose carpels.....------------- Bifora, 70. 
Stylopodium flat or wanting. 
Leaves simple and perfoliate .......----------------- Bupleurum, &4. 
Leaves large and decompound._.......------------------ Conium, 252. 
Seed face plane. 
Leaves simple and lobed; southwestern .....------------- Bowlesia, 30. 
Leaves biternate; introduced at the east.......---------+ Aegopodium, 254. 
